diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index c0b8c1a293..de7d8306fd 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -8,10 +8,14 @@ Please mark all change in change log and use the ticket from JIRA.
 
 ## Improvement
 - MS-552 - Add and change the easylogging library
+- MS-553 - Refine cache code
+- MS-557 - Merge Log.h
+- MS-556 - Add Job Definition in Scheduler
 
 ## New Feature
 
 ## Task
+- MS-554 - Change license to Apache 2.0
 
 # Milvus 0.4.0 (2019-09-12)
 
diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 21c79ac07d..69aaa9f07d 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -1,9 +1,23 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 cmake_minimum_required(VERSION 3.14)
 message(STATUS "Building using CMake version: ${CMAKE_VERSION}")
 
diff --git a/cpp/src/CMakeLists.txt b/cpp/src/CMakeLists.txt
index 3dc838c19e..c8cba4d9aa 100644
--- a/cpp/src/CMakeLists.txt
+++ b/cpp/src/CMakeLists.txt
@@ -1,9 +1,23 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 add_subdirectory(core)
 
 set(CORE_INCLUDE_DIRS ${CORE_INCLUDE_DIRS} PARENT_SCOPE)
@@ -25,12 +39,14 @@ aux_source_directory(wrapper/knowhere knowhere_files)
 
 aux_source_directory(scheduler/action scheduler_action_files)
 aux_source_directory(scheduler/event scheduler_event_files)
+aux_source_directory(scheduler/job scheduler_job_files)
 aux_source_directory(scheduler/resource scheduler_resource_files)
 aux_source_directory(scheduler/task scheduler_task_files)
 aux_source_directory(scheduler scheduler_root_files)
 set(scheduler_srcs
         ${scheduler_action_files}
         ${scheduler_event_files}
+        ${scheduler_job_files}
         ${scheduler_resource_files}
         ${scheduler_task_files}
         ${scheduler_root_files}
diff --git a/cpp/src/cache/Cache.cpp b/cpp/src/cache/Cache.cpp
deleted file mode 100644
index 336bf4e82c..0000000000
--- a/cpp/src/cache/Cache.cpp
+++ /dev/null
@@ -1,212 +0,0 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
-
-#include "Cache.h"
-#include "utils/Log.h"
-
-#include <set>
-
-namespace zilliz {
-namespace milvus {
-namespace cache {
-
-constexpr double DEFAULT_THRESHHOLD_PERCENT = 0.85;
-
-Cache::Cache(int64_t capacity, uint64_t cache_max_count)
-    : usage_(0),
-      capacity_(capacity),
-      freemem_percent_(DEFAULT_THRESHHOLD_PERCENT),
-      lru_(cache_max_count) {
-//    AGENT_LOG_DEBUG << "Construct Cache with capacity " << std::to_string(mem_capacity)
-}
-
-void Cache::set_capacity(int64_t capacity) {
-    if(capacity > 0) {
-        capacity_ = capacity;
-        free_memory();
-    }
-}
-
-size_t Cache::size() const {
-    std::lock_guard<std::mutex> lock(mutex_);
-    return lru_.size();
-}
-
-bool Cache::exists(const std::string& key) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    return lru_.exists(key);
-}
-
-DataObjPtr Cache::get(const std::string& key) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    if(!lru_.exists(key)){
-        return nullptr;
-    }
-
-    const CacheObjPtr& cache_obj = lru_.get(key);
-    return cache_obj->data_;
-}
-
-void Cache::insert(const std::string& key, const DataObjPtr& data_ptr) {
-    {
-        std::lock_guard<std::mutex> lock(mutex_);
-
-        /* if key already exist, over-write old data */
-        if (lru_.exists(key)) {
-            CacheObjPtr obj_ptr = lru_.get(key);
-
-            usage_ -= obj_ptr->data_->size();
-            obj_ptr->data_ = data_ptr;
-            usage_ += data_ptr->size();
-        } else {
-            CacheObjPtr obj_ptr(new CacheObj(data_ptr));
-            lru_.put(key, obj_ptr);
-            usage_ += data_ptr->size();
-        }
-
-        SERVER_LOG_DEBUG << "Insert " << key << " size:" << data_ptr->size()
-            << " bytes into cache, usage: " << usage_ << " bytes";
-    }
-
-    if (usage_ > capacity_) {
-        SERVER_LOG_DEBUG << "Current usage " << usage_
-                        << " exceeds cache capacity " << capacity_
-                        << ", start free memory";
-        free_memory();
-    }
-}
-
-void Cache::erase(const std::string& key) {
-    std::lock_guard<std::mutex> lock(mutex_);
-    if(!lru_.exists(key)){
-        return;
-    }
-
-    const CacheObjPtr& obj_ptr = lru_.get(key);
-    const DataObjPtr& data_ptr = obj_ptr->data_;
-    usage_ -= data_ptr->size();
-
-    SERVER_LOG_DEBUG << "Erase " << key << " size: " << data_ptr->size();
-
-    lru_.erase(key);
-}
-
-void Cache::clear() {
-    std::lock_guard<std::mutex> lock(mutex_);
-    lru_.clear();
-    usage_ = 0;
-    SERVER_LOG_DEBUG << "Clear cache !";
-}
-
-#if 0 /* caiyd 20190221, need more testing before enable */
-void Cache::flush_to_file(const std::string& key, const CacheObjPtr& obj_ptr) {
-    if (!this->swap_enabled_) return;
-
-    const DataObjPtr data_ptr = obj_ptr->data();
-
-    if (data_ptr == nullptr || data_ptr->size() == 0) return;
-    if (data_ptr->ptr() == nullptr) return;
-
-    std::string name = std::to_string(reinterpret_cast<int64_t>(data_ptr.get()));
-    filesys::CreateDirectory(this->swap_path_);
-
-    /* write cache data to file */
-    obj_ptr->set_file_path(this->swap_path_ + "/" + name);
-    std::shared_ptr<arrow::io::OutputStream> outfile = nullptr;
-    filesys::OpenWritableFile(obj_ptr->file_path(), false, &outfile);
-    filesys::WriteFile(outfile, data_ptr->ptr().get(), data_ptr->size());
-    (void)outfile->Close();
-
-    AGENT_LOG_DEBUG << "Flush cache data: " << key << ", to file: " << obj_ptr->file_path();
-
-    /* free cache memory */
-    data_ptr->ptr().reset();
-    usage_ -= data_ptr->size();
-}
-
-void Cache::restore_from_file(const std::string& key, const CacheObjPtr& obj_ptr) {
-    if (!this->swap_enabled_) return;
-
-    const DataObjPtr data_ptr = obj_ptr->data();
-    if (data_ptr == nullptr || data_ptr->size() == 0) return;
-
-    std::shared_ptr<arrow::io::RandomAccessFile> infile = nullptr;
-    int64_t file_size, bytes_read;
-
-    /* load cache data from file */
-    if (!filesys::FileExist(obj_ptr->file_path())) {
-        THROW_AGENT_UNEXPECTED_ERROR("File not exist: " + obj_ptr->file_path());
-    }
-    filesys::OpenReadableFile(obj_ptr->file_path(), &infile);
-    infile->GetSize(&file_size);
-    if (data_ptr->size() != file_size) {
-        THROW_AGENT_UNEXPECTED_ERROR("File size not match: " + obj_ptr->file_path());
-    }
-    data_ptr->set_ptr(lib::gpu::MakeShared<char>(data_ptr->size(), lib::gpu::MallocHint::kUnifiedGlobal));
-    infile->Read(file_size, &bytes_read, data_ptr->ptr().get());
-    infile->Close();
-
-    AGENT_LOG_DEBUG << "Restore cache data: " << key << ", from file: " << obj_ptr->file_path();
-
-    /* clear file path */
-    obj_ptr->set_file_path("");
-    usage_ += data_ptr->size();
-}
-#endif
-
-/* free memory space when CACHE occupation exceed its capacity */
-void Cache::free_memory() {
-    if (usage_ <= capacity_) return;
-
-    int64_t threshhold = capacity_ * freemem_percent_;
-    int64_t delta_size = usage_ - threshhold;
-    if(delta_size <= 0) {
-        delta_size = 1;//ensure at least one item erased
-    }
-
-    std::set<std::string> key_array;
-    int64_t released_size = 0;
-
-    {
-        std::lock_guard<std::mutex> lock(mutex_);
-
-        auto it = lru_.rbegin();
-        while (it != lru_.rend() && released_size < delta_size) {
-            auto& key = it->first;
-            auto& obj_ptr = it->second;
-            const auto& data_ptr = obj_ptr->data_;
-
-            key_array.emplace(key);
-            released_size += data_ptr->size();
-            ++it;
-        }
-    }
-
-    SERVER_LOG_DEBUG << "to be released memory size: " << released_size;
-
-    for (auto& key : key_array) {
-        erase(key);
-    }
-
-    print();
-}
-
-void Cache::print() {
-    size_t cache_count = 0;
-    {
-        std::lock_guard<std::mutex> lock(mutex_);
-        cache_count = lru_.size();
-    }
-
-    SERVER_LOG_DEBUG << "[Cache item count]: " << cache_count;
-    SERVER_LOG_DEBUG << "[Cache usage]: " << usage_ << " bytes";
-    SERVER_LOG_DEBUG << "[Cache capacity]: " << capacity_ << " bytes";
-}
-
-}   // cache
-}   // milvus
-}   // zilliz
-
diff --git a/cpp/src/cache/Cache.h b/cpp/src/cache/Cache.h
index 4d6f32b9eb..b2a57ebdfb 100644
--- a/cpp/src/cache/Cache.h
+++ b/cpp/src/cache/Cache.h
@@ -1,40 +1,37 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
+#include "LRU.h"
+#include "utils/Log.h"
+
 #include <string>
 #include <mutex>
 #include <atomic>
-
-#include "LRU.h"
-#include "DataObj.h"
+#include <set>
 
 namespace zilliz {
 namespace milvus {
 namespace cache {
 
-const std::string SWAP_DIR = ".CACHE";
-
+template<typename ItemObj>
 class Cache {
-private:
-    class CacheObj {
-    public:
-        CacheObj() = delete;
-
-        CacheObj(const DataObjPtr& data)
-        : data_(data) {
-        }
-
-    public:
-        DataObjPtr data_ = nullptr;
-    };
-
-    using CacheObjPtr = std::shared_ptr<CacheObj>;
-
 public:
     //mem_capacity, units:GB
     Cache(int64_t capacity_gb, uint64_t cache_max_count);
@@ -49,11 +46,13 @@ public:
 
     size_t size() const;
     bool exists(const std::string& key);
-    DataObjPtr get(const std::string& key);
-    void insert(const std::string& key, const DataObjPtr& data);
+    ItemObj get(const std::string& key);
+    void insert(const std::string& key, const ItemObj& item);
     void erase(const std::string& key);
     void print();
     void clear();
+
+private:
     void free_memory();
 
 private:
@@ -61,13 +60,12 @@ private:
     int64_t capacity_;
     double freemem_percent_;
 
-    LRU<std::string, CacheObjPtr> lru_;
+    LRU<std::string, ItemObj> lru_;
     mutable std::mutex mutex_;
 };
 
-using CachePtr = std::shared_ptr<Cache>;
-
 }   // cache
 }   // milvus
 }   // zilliz
 
+#include "cache/Cache.inl"
\ No newline at end of file
diff --git a/cpp/src/cache/Cache.inl b/cpp/src/cache/Cache.inl
new file mode 100644
index 0000000000..3eaffc4556
--- /dev/null
+++ b/cpp/src/cache/Cache.inl
@@ -0,0 +1,185 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
+
+namespace zilliz {
+namespace milvus {
+namespace cache {
+
+constexpr double DEFAULT_THRESHHOLD_PERCENT = 0.85;
+
+template<typename ItemObj>
+Cache<ItemObj>::Cache(int64_t capacity, uint64_t cache_max_count)
+    : usage_(0),
+      capacity_(capacity),
+      freemem_percent_(DEFAULT_THRESHHOLD_PERCENT),
+      lru_(cache_max_count) {
+//    AGENT_LOG_DEBUG << "Construct Cache with capacity " << std::to_string(mem_capacity)
+}
+
+template<typename ItemObj>
+void Cache<ItemObj>::set_capacity(int64_t capacity) {
+    if(capacity > 0) {
+        capacity_ = capacity;
+        free_memory();
+    }
+}
+
+template<typename ItemObj>
+size_t Cache<ItemObj>::size() const {
+    std::lock_guard<std::mutex> lock(mutex_);
+    return lru_.size();
+}
+
+template<typename ItemObj>
+bool Cache<ItemObj>::exists(const std::string& key) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    return lru_.exists(key);
+}
+
+template<typename ItemObj>
+ItemObj Cache<ItemObj>::get(const std::string& key) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    if(!lru_.exists(key)){
+        return nullptr;
+    }
+
+    return lru_.get(key);
+}
+
+template<typename ItemObj>
+void Cache<ItemObj>::insert(const std::string& key, const ItemObj& item) {
+    if(item == nullptr) {
+        return;
+    }
+
+//    if(item->size() > capacity_) {
+//        SERVER_LOG_ERROR << "Item size " << item->size()
+//                        << " is too large to insert into cache, capacity " << capacity_;
+//        return;
+//    }
+
+    //calculate usage
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+
+        //if key already exist, subtract old item size
+        if (lru_.exists(key)) {
+            const ItemObj& old_item = lru_.get(key);
+            usage_ -= old_item->size();
+        }
+
+        //plus new item size
+        usage_ += item->size();
+    }
+
+    //if usage exceed capacity, free some items
+    if (usage_ > capacity_) {
+        SERVER_LOG_DEBUG << "Current usage " << usage_
+                         << " exceeds cache capacity " << capacity_
+                         << ", start free memory";
+        free_memory();
+    }
+
+    //insert new item
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+
+        lru_.put(key, item);
+        SERVER_LOG_DEBUG << "Insert " << key << " size:" << item->size()
+                         << " bytes into cache, usage: " << usage_ << " bytes";
+    }
+}
+
+template<typename ItemObj>
+void Cache<ItemObj>::erase(const std::string& key) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    if(!lru_.exists(key)){
+        return;
+    }
+
+    const ItemObj& old_item = lru_.get(key);
+    usage_ -= old_item->size();
+
+    SERVER_LOG_DEBUG << "Erase " << key << " size: " << old_item->size();
+
+    lru_.erase(key);
+}
+
+template<typename ItemObj>
+void Cache<ItemObj>::clear() {
+    std::lock_guard<std::mutex> lock(mutex_);
+    lru_.clear();
+    usage_ = 0;
+    SERVER_LOG_DEBUG << "Clear cache !";
+}
+
+/* free memory space when CACHE occupation exceed its capacity */
+template<typename ItemObj>
+void Cache<ItemObj>::free_memory() {
+    if (usage_ <= capacity_) return;
+
+    int64_t threshhold = capacity_ * freemem_percent_;
+    int64_t delta_size = usage_ - threshhold;
+    if(delta_size <= 0) {
+        delta_size = 1;//ensure at least one item erased
+    }
+
+    std::set<std::string> key_array;
+    int64_t released_size = 0;
+
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+
+        auto it = lru_.rbegin();
+        while (it != lru_.rend() && released_size < delta_size) {
+            auto& key = it->first;
+            auto& obj_ptr = it->second;
+
+            key_array.emplace(key);
+            released_size += obj_ptr->size();
+            ++it;
+        }
+    }
+
+    SERVER_LOG_DEBUG << "to be released memory size: " << released_size;
+
+    for (auto& key : key_array) {
+        erase(key);
+    }
+
+    print();
+}
+
+template<typename ItemObj>
+void Cache<ItemObj>::print() {
+    size_t cache_count = 0;
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        cache_count = lru_.size();
+    }
+
+    SERVER_LOG_DEBUG << "[Cache item count]: " << cache_count;
+    SERVER_LOG_DEBUG << "[Cache usage]: " << usage_ << " bytes";
+    SERVER_LOG_DEBUG << "[Cache capacity]: " << capacity_ << " bytes";
+}
+
+}   // cache
+}   // milvus
+}   // zilliz
+
diff --git a/cpp/src/cache/CacheMgr.cpp b/cpp/src/cache/CacheMgr.cpp
deleted file mode 100644
index 977c7e1c42..0000000000
--- a/cpp/src/cache/CacheMgr.cpp
+++ /dev/null
@@ -1,135 +0,0 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
-
-#include "utils/Log.h"
-#include "CacheMgr.h"
-#include "metrics/Metrics.h"
-
-namespace zilliz {
-namespace milvus {
-namespace cache {
-
-CacheMgr::CacheMgr() {
-}
-
-CacheMgr::~CacheMgr() {
-
-}
-
-uint64_t CacheMgr::ItemCount() const {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return 0;
-    }
-
-    return (uint64_t)(cache_->size());
-}
-
-bool CacheMgr::ItemExists(const std::string& key) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return false;
-    }
-
-    return cache_->exists(key);
-}
-
-DataObjPtr CacheMgr::GetItem(const std::string& key) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return nullptr;
-    }
-    server::Metrics::GetInstance().CacheAccessTotalIncrement();
-    return cache_->get(key);
-}
-
-engine::VecIndexPtr CacheMgr::GetIndex(const std::string& key) {
-    DataObjPtr obj = GetItem(key);
-    if(obj != nullptr) {
-        return obj->data();
-    }
-
-    return nullptr;
-}
-
-void CacheMgr::InsertItem(const std::string& key, const DataObjPtr& data) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-
-    cache_->insert(key, data);
-    server::Metrics::GetInstance().CacheAccessTotalIncrement();
-}
-
-void CacheMgr::InsertItem(const std::string& key, const engine::VecIndexPtr& index) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-
-    DataObjPtr obj = std::make_shared<DataObj>(index);
-    cache_->insert(key, obj);
-    server::Metrics::GetInstance().CacheAccessTotalIncrement();
-}
-
-void CacheMgr::EraseItem(const std::string& key) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-
-    cache_->erase(key);
-    server::Metrics::GetInstance().CacheAccessTotalIncrement();
-}
-
-void CacheMgr::PrintInfo() {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-
-    cache_->print();
-}
-
-void CacheMgr::ClearCache() {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-
-    cache_->clear();
-}
-
-int64_t CacheMgr::CacheUsage() const {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return 0;
-    }
-
-    return cache_->usage();
-}
-
-int64_t CacheMgr::CacheCapacity() const {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return 0;
-    }
-
-    return cache_->capacity();
-}
-
-void CacheMgr::SetCapacity(int64_t capacity) {
-    if(cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
-    }
-    cache_->set_capacity(capacity);
-}
-
-}
-}
-}
diff --git a/cpp/src/cache/CacheMgr.h b/cpp/src/cache/CacheMgr.h
index b6f1ec8ef1..1dd630e14d 100644
--- a/cpp/src/cache/CacheMgr.h
+++ b/cpp/src/cache/CacheMgr.h
@@ -1,28 +1,41 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
 #include "Cache.h"
+#include "utils/Log.h"
+#include "metrics/Metrics.h"
 
 namespace zilliz {
 namespace milvus {
 namespace cache {
 
+template<typename ItemObj>
 class CacheMgr {
 public:
     virtual uint64_t ItemCount() const;
 
     virtual bool ItemExists(const std::string& key);
 
-    virtual DataObjPtr GetItem(const std::string& key);
-    virtual engine::VecIndexPtr GetIndex(const std::string& key);
+    virtual ItemObj GetItem(const std::string& key);
 
-    virtual void InsertItem(const std::string& key, const DataObjPtr& data);
-    virtual void InsertItem(const std::string& key, const engine::VecIndexPtr& index);
+    virtual void InsertItem(const std::string& key, const ItemObj& data);
 
     virtual void EraseItem(const std::string& key);
 
@@ -39,6 +52,7 @@ protected:
     virtual ~CacheMgr();
 
 protected:
+    using CachePtr = std::shared_ptr<Cache<ItemObj>>;
     CachePtr cache_;
 };
 
@@ -46,3 +60,5 @@ protected:
 }
 }
 }
+
+#include "cache/CacheMgr.inl"
\ No newline at end of file
diff --git a/cpp/src/cache/CacheMgr.inl b/cpp/src/cache/CacheMgr.inl
new file mode 100644
index 0000000000..36c3d94642
--- /dev/null
+++ b/cpp/src/cache/CacheMgr.inl
@@ -0,0 +1,135 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
+namespace zilliz {
+namespace milvus {
+namespace cache {
+
+template<typename ItemObj>
+CacheMgr<ItemObj>::CacheMgr() {
+}
+
+template<typename ItemObj>
+CacheMgr<ItemObj>::~CacheMgr() {
+
+}
+
+template<typename ItemObj>
+uint64_t CacheMgr<ItemObj>::ItemCount() const {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return 0;
+    }
+
+    return (uint64_t)(cache_->size());
+}
+
+template<typename ItemObj>
+bool CacheMgr<ItemObj>::ItemExists(const std::string& key) {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return false;
+    }
+
+    return cache_->exists(key);
+}
+
+template<typename ItemObj>
+ItemObj CacheMgr<ItemObj>::GetItem(const std::string& key) {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return nullptr;
+    }
+    server::Metrics::GetInstance().CacheAccessTotalIncrement();
+    return cache_->get(key);
+}
+
+template<typename ItemObj>
+void CacheMgr<ItemObj>::InsertItem(const std::string& key, const ItemObj& data) {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return;
+    }
+
+    cache_->insert(key, data);
+    server::Metrics::GetInstance().CacheAccessTotalIncrement();
+}
+
+template<typename ItemObj>
+void CacheMgr<ItemObj>::EraseItem(const std::string& key) {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return;
+    }
+
+    cache_->erase(key);
+    server::Metrics::GetInstance().CacheAccessTotalIncrement();
+}
+
+template<typename ItemObj>
+void CacheMgr<ItemObj>::PrintInfo() {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return;
+    }
+
+    cache_->print();
+}
+
+template<typename ItemObj>
+void CacheMgr<ItemObj>::ClearCache() {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return;
+    }
+
+    cache_->clear();
+}
+
+template<typename ItemObj>
+int64_t CacheMgr<ItemObj>::CacheUsage() const {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return 0;
+    }
+
+    return cache_->usage();
+}
+
+template<typename ItemObj>
+int64_t CacheMgr<ItemObj>::CacheCapacity() const {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return 0;
+    }
+
+    return cache_->capacity();
+}
+
+template<typename ItemObj>
+void CacheMgr<ItemObj>::SetCapacity(int64_t capacity) {
+    if(cache_ == nullptr) {
+        SERVER_LOG_ERROR << "Cache doesn't exist";
+        return;
+    }
+    cache_->set_capacity(capacity);
+}
+
+}
+}
+}
diff --git a/cpp/src/cache/CpuCacheMgr.cpp b/cpp/src/cache/CpuCacheMgr.cpp
index 167f91f5e5..e47d768f34 100644
--- a/cpp/src/cache/CpuCacheMgr.cpp
+++ b/cpp/src/cache/CpuCacheMgr.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "CpuCacheMgr.h"
 #include "server/ServerConfig.h"
@@ -20,7 +32,7 @@ CpuCacheMgr::CpuCacheMgr() {
     server::ConfigNode& config = server::ServerConfig::GetInstance().GetConfig(server::CONFIG_CACHE);
     int64_t cap = config.GetInt64Value(server::CONFIG_CPU_CACHE_CAPACITY, 16);
     cap *= unit;
-    cache_ = std::make_shared<Cache>(cap, 1UL<<32);
+    cache_ = std::make_shared<Cache<DataObjPtr>>(cap, 1UL<<32);
 
     double free_percent = config.GetDoubleValue(server::CACHE_FREE_PERCENT, 0.85);
     if(free_percent > 0.0 && free_percent <= 1.0) {
@@ -31,6 +43,20 @@ CpuCacheMgr::CpuCacheMgr() {
     }
 }
 
+CpuCacheMgr* CpuCacheMgr::GetInstance() {
+    static CpuCacheMgr s_mgr;
+    return &s_mgr;
+}
+
+engine::VecIndexPtr CpuCacheMgr::GetIndex(const std::string& key) {
+    DataObjPtr obj = GetItem(key);
+    if(obj != nullptr) {
+        return obj->data();
+    }
+
+    return nullptr;
+}
+
 }
 }
 }
\ No newline at end of file
diff --git a/cpp/src/cache/CpuCacheMgr.h b/cpp/src/cache/CpuCacheMgr.h
index 39e33aef89..5a2cdb599a 100644
--- a/cpp/src/cache/CpuCacheMgr.h
+++ b/cpp/src/cache/CpuCacheMgr.h
@@ -1,27 +1,38 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "CacheMgr.h"
+#include "DataObj.h"
 
 namespace zilliz {
 namespace milvus {
 namespace cache {
 
-class CpuCacheMgr : public CacheMgr {
+class CpuCacheMgr : public CacheMgr<DataObjPtr> {
 private:
     CpuCacheMgr();
 
 public:
     //TODO: use smart pointer instead
-    static CacheMgr* GetInstance() {
-        static CpuCacheMgr s_mgr;
-        return &s_mgr;
-    }
+    static CpuCacheMgr* GetInstance();
 
+    engine::VecIndexPtr GetIndex(const std::string& key);
 };
 
 }
diff --git a/cpp/src/cache/DataObj.h b/cpp/src/cache/DataObj.h
index d9c14f4d1b..8ba59104cd 100644
--- a/cpp/src/cache/DataObj.h
+++ b/cpp/src/cache/DataObj.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/cache/GpuCacheMgr.cpp b/cpp/src/cache/GpuCacheMgr.cpp
index 5c1afa3f5c..bd6f2adfe1 100644
--- a/cpp/src/cache/GpuCacheMgr.cpp
+++ b/cpp/src/cache/GpuCacheMgr.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <sstream>
 #include "utils/Log.h"
@@ -25,7 +37,7 @@ GpuCacheMgr::GpuCacheMgr() {
 
     int64_t cap = config.GetInt64Value(server::CONFIG_GPU_CACHE_CAPACITY, 0);
     cap *= G_BYTE;
-    cache_ = std::make_shared<Cache>(cap, 1UL<<32);
+    cache_ = std::make_shared<Cache<DataObjPtr>>(cap, 1UL<<32);
 
     double free_percent = config.GetDoubleValue(server::GPU_CACHE_FREE_PERCENT, 0.85);
     if (free_percent > 0.0 && free_percent <= 1.0) {
@@ -36,7 +48,7 @@ GpuCacheMgr::GpuCacheMgr() {
     }
 }
 
-CacheMgr* GpuCacheMgr::GetInstance(uint64_t gpu_id) {
+GpuCacheMgr* GpuCacheMgr::GetInstance(uint64_t gpu_id) {
     if (instance_.find(gpu_id) == instance_.end()) {
         std::lock_guard<std::mutex> lock(mutex_);
         if (instance_.find(gpu_id) == instance_.end()) {
@@ -49,14 +61,13 @@ CacheMgr* GpuCacheMgr::GetInstance(uint64_t gpu_id) {
     }
 }
 
-void GpuCacheMgr::InsertItem(const std::string& key, const DataObjPtr& data) {
-    //TODO: copy data to gpu
-    if (cache_ == nullptr) {
-        SERVER_LOG_ERROR << "Cache doesn't exist";
-        return;
+engine::VecIndexPtr GpuCacheMgr::GetIndex(const std::string& key) {
+    DataObjPtr obj = GetItem(key);
+    if(obj != nullptr) {
+        return obj->data();
     }
 
-    cache_->insert(key, data);
+    return nullptr;
 }
 
 }
diff --git a/cpp/src/cache/GpuCacheMgr.h b/cpp/src/cache/GpuCacheMgr.h
index 35756733f0..57539b6981 100644
--- a/cpp/src/cache/GpuCacheMgr.h
+++ b/cpp/src/cache/GpuCacheMgr.h
@@ -1,10 +1,24 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "CacheMgr.h"
+#include "DataObj.h"
+
 #include <unordered_map>
 #include <memory>
 
@@ -15,13 +29,13 @@ namespace cache {
 class GpuCacheMgr;
 using GpuCacheMgrPtr = std::shared_ptr<GpuCacheMgr>;
 
-class GpuCacheMgr : public CacheMgr {
+class GpuCacheMgr : public CacheMgr<DataObjPtr> {
 public:
     GpuCacheMgr();
 
-    static CacheMgr* GetInstance(uint64_t gpu_id);
+    static GpuCacheMgr* GetInstance(uint64_t gpu_id);
 
-    void InsertItem(const std::string& key, const DataObjPtr& data) override;
+    engine::VecIndexPtr GetIndex(const std::string& key);
 
 private:
     static std::mutex mutex_;
diff --git a/cpp/src/cache/LRU.h b/cpp/src/cache/LRU.h
index 5d8e8881c9..f117425d2b 100644
--- a/cpp/src/cache/LRU.h
+++ b/cpp/src/cache/LRU.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/config/ConfigMgr.cpp b/cpp/src/config/ConfigMgr.cpp
index 06819bd6dd..f39679fcdd 100644
--- a/cpp/src/config/ConfigMgr.cpp
+++ b/cpp/src/config/ConfigMgr.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ConfigMgr.h"
 #include "YamlConfigMgr.h"
 
diff --git a/cpp/src/config/ConfigMgr.h b/cpp/src/config/ConfigMgr.h
index e14ea43b36..3e546103b6 100644
--- a/cpp/src/config/ConfigMgr.h
+++ b/cpp/src/config/ConfigMgr.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/config/ConfigNode.cpp b/cpp/src/config/ConfigNode.cpp
index a6b91bf67d..88954c1bdf 100644
--- a/cpp/src/config/ConfigNode.cpp
+++ b/cpp/src/config/ConfigNode.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ConfigNode.h"
 #include "utils/Error.h"
 #include "utils/Log.h"
diff --git a/cpp/src/config/ConfigNode.h b/cpp/src/config/ConfigNode.h
index 6cb3f8f808..606e090d4b 100644
--- a/cpp/src/config/ConfigNode.h
+++ b/cpp/src/config/ConfigNode.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <vector>
diff --git a/cpp/src/config/YamlConfigMgr.cpp b/cpp/src/config/YamlConfigMgr.cpp
index bb395a5003..bddbc32245 100644
--- a/cpp/src/config/YamlConfigMgr.cpp
+++ b/cpp/src/config/YamlConfigMgr.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "YamlConfigMgr.h"
 #include "utils/Log.h"
 
diff --git a/cpp/src/config/YamlConfigMgr.h b/cpp/src/config/YamlConfigMgr.h
index 412694dab1..ef4d02c3ce 100644
--- a/cpp/src/config/YamlConfigMgr.h
+++ b/cpp/src/config/YamlConfigMgr.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "ConfigMgr.h"
diff --git a/cpp/src/core/CMakeLists.txt b/cpp/src/core/CMakeLists.txt
index d406f41ce3..b18af23f1e 100644
--- a/cpp/src/core/CMakeLists.txt
+++ b/cpp/src/core/CMakeLists.txt
@@ -1,9 +1,23 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 cmake_minimum_required(VERSION 3.14)
 message(STATUS "---------------core--------------")
 message(STATUS "Building using CMake version: ${CMAKE_VERSION}")
diff --git a/cpp/src/core/include/knowhere/adapter/faiss_adopt.h b/cpp/src/core/include/knowhere/adapter/faiss_adopt.h
index 26a005122e..bdace40a74 100644
--- a/cpp/src/core/include/knowhere/adapter/faiss_adopt.h
+++ b/cpp/src/core/include/knowhere/adapter/faiss_adopt.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/adapter/structure.h b/cpp/src/core/include/knowhere/adapter/structure.h
index e0478ed38e..9ffac4fdac 100644
--- a/cpp/src/core/include/knowhere/adapter/structure.h
+++ b/cpp/src/core/include/knowhere/adapter/structure.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/common/exception.h b/cpp/src/core/include/knowhere/common/exception.h
index 786c322584..d357f0501e 100644
--- a/cpp/src/core/include/knowhere/common/exception.h
+++ b/cpp/src/core/include/knowhere/common/exception.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/common/timer.h b/cpp/src/core/include/knowhere/common/timer.h
index 680d984d19..8ecd60df99 100644
--- a/cpp/src/core/include/knowhere/common/timer.h
+++ b/cpp/src/core/include/knowhere/common/timer.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/cloner.h b/cpp/src/core/include/knowhere/index/vector_index/cloner.h
index 008954c34a..f546ecc7d9 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/cloner.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/cloner.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/idmap.h b/cpp/src/core/include/knowhere/index/vector_index/idmap.h
index 9582249057..b54a589423 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/idmap.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/idmap.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/ivf.h b/cpp/src/core/include/knowhere/index/vector_index/ivf.h
index 36f292d9e5..e8ac6cae99 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/ivf.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/ivf.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/nsg/neighbor.h b/cpp/src/core/include/knowhere/index/vector_index/nsg/neighbor.h
index 40281d2d6d..9aceb62692 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/nsg/neighbor.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/nsg/neighbor.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg.h b/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg.h
index 5783a8796e..247d78b97b 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg_io.h b/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg_io.h
index 5f20e715c7..e84d2a9851 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg_io.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/nsg/nsg_io.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/include/knowhere/index/vector_index/nsg_index.h b/cpp/src/core/include/knowhere/index/vector_index/nsg_index.h
index 21896fac49..a0829f381c 100644
--- a/cpp/src/core/include/knowhere/index/vector_index/nsg_index.h
+++ b/cpp/src/core/include/knowhere/index/vector_index/nsg_index.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/src/knowhere/adapter/structure.cpp b/cpp/src/core/src/knowhere/adapter/structure.cpp
index c78b1f125d..f30479dd5a 100644
--- a/cpp/src/core/src/knowhere/adapter/structure.cpp
+++ b/cpp/src/core/src/knowhere/adapter/structure.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "knowhere/adapter/structure.h"
 
diff --git a/cpp/src/core/src/knowhere/common/exception.cpp b/cpp/src/core/src/knowhere/common/exception.cpp
index 1697f14910..f46cbfc35a 100644
--- a/cpp/src/core/src/knowhere/common/exception.cpp
+++ b/cpp/src/core/src/knowhere/common/exception.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "knowhere/common/exception.h"
 #include <cstdio>
diff --git a/cpp/src/core/src/knowhere/common/timer.cpp b/cpp/src/core/src/knowhere/common/timer.cpp
index 01e62b2425..08654413ff 100644
--- a/cpp/src/core/src/knowhere/common/timer.cpp
+++ b/cpp/src/core/src/knowhere/common/timer.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <iostream> // TODO(linxj): using Log instead
 
diff --git a/cpp/src/core/src/knowhere/index/vector_index/cloner.cpp b/cpp/src/core/src/knowhere/index/vector_index/cloner.cpp
index 4229bf0a88..f5bcfb896d 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/cloner.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/cloner.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "knowhere/common/exception.h"
 #include "knowhere/index/vector_index/cloner.h"
diff --git a/cpp/src/core/src/knowhere/index/vector_index/gpu_ivf.cpp b/cpp/src/core/src/knowhere/index/vector_index/gpu_ivf.cpp
index fcea597251..590ded16bf 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/gpu_ivf.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/gpu_ivf.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 
 #include <faiss/gpu/GpuIndexFlat.h>
diff --git a/cpp/src/core/src/knowhere/index/vector_index/idmap.cpp b/cpp/src/core/src/knowhere/index/vector_index/idmap.cpp
index e6157b5a1e..142d06b5d8 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/idmap.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/idmap.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <faiss/IndexFlat.h>
 #include <faiss/AutoTune.h>
diff --git a/cpp/src/core/src/knowhere/index/vector_index/ivf.cpp b/cpp/src/core/src/knowhere/index/vector_index/ivf.cpp
index 7d3e9e54fa..acfbb17651 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/ivf.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/ivf.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <faiss/IndexFlat.h>
 #include <faiss/IndexIVF.h>
 #include <faiss/IndexIVFFlat.h>
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg/index_io.h b/cpp/src/core/src/knowhere/index/vector_index/nsg/index_io.h
index 0e32622f15..fd8fc9e7ad 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg/index_io.h
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg/index_io.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg.cpp b/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg.cpp
index 5e8acbf344..d3efc5e38a 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <cstring>
 #include <cstdlib>
 #include <iostream>
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg_io.cpp b/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg_io.cpp
index e9854236bc..283e8cc7e2 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg_io.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg/nsg_io.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <cstring>
 
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.cpp b/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.cpp
index 4be8aece02..96a78bb63f 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <cstring>
 #include <fstream>
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.h b/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.h
index 4d9dbbbda3..82c8a00dc8 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.h
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg/utils.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/src/knowhere/index/vector_index/nsg_index.cpp b/cpp/src/core/src/knowhere/index/vector_index/nsg_index.cpp
index aa56b81382..550efef70d 100644
--- a/cpp/src/core/src/knowhere/index/vector_index/nsg_index.cpp
+++ b/cpp/src/core/src/knowhere/index/vector_index/nsg_index.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "knowhere/index/vector_index/nsg_index.h"
 #include "knowhere/index/vector_index/nsg/nsg.h"
diff --git a/cpp/src/core/test/faiss_ori/gpuresource_test.cpp b/cpp/src/core/test/faiss_ori/gpuresource_test.cpp
index f88ad3e111..0dcc2766cc 100644
--- a/cpp/src/core/test/faiss_ori/gpuresource_test.cpp
+++ b/cpp/src/core/test/faiss_ori/gpuresource_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 
 #include <faiss/gpu/StandardGpuResources.h>
diff --git a/cpp/src/core/test/test_idmap.cpp b/cpp/src/core/test/test_idmap.cpp
index 9a8001be2b..f85210b574 100644
--- a/cpp/src/core/test/test_idmap.cpp
+++ b/cpp/src/core/test/test_idmap.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 
diff --git a/cpp/src/core/test/test_ivf.cpp b/cpp/src/core/test/test_ivf.cpp
index efa7ef17bd..f1ae3f44a6 100644
--- a/cpp/src/core/test/test_ivf.cpp
+++ b/cpp/src/core/test/test_ivf.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 
diff --git a/cpp/src/core/test/test_json.cpp b/cpp/src/core/test/test_json.cpp
index bc4c1666ff..b3c4fd4993 100644
--- a/cpp/src/core/test/test_json.cpp
+++ b/cpp/src/core/test/test_json.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "knowhere/common/config.h"
 
diff --git a/cpp/src/core/test/test_kdt.cpp b/cpp/src/core/test/test_kdt.cpp
index 34eeb9933b..9581cc8ee0 100644
--- a/cpp/src/core/test/test_kdt.cpp
+++ b/cpp/src/core/test/test_kdt.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 
diff --git a/cpp/src/core/test/test_nsg.cpp b/cpp/src/core/test/test_nsg.cpp
index d7e472b13e..f156925027 100644
--- a/cpp/src/core/test/test_nsg.cpp
+++ b/cpp/src/core/test/test_nsg.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <fstream>
 #include <iostream>
diff --git a/cpp/src/core/test/test_nsg/test_nsg.cpp b/cpp/src/core/test/test_nsg/test_nsg.cpp
index 6d378c41a5..b1b1edef46 100644
--- a/cpp/src/core/test/test_nsg/test_nsg.cpp
+++ b/cpp/src/core/test/test_nsg/test_nsg.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 #include <memory>
diff --git a/cpp/src/core/test/utils.cpp b/cpp/src/core/test/utils.cpp
index 5c007aac28..97f4600ca7 100644
--- a/cpp/src/core/test/utils.cpp
+++ b/cpp/src/core/test/utils.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "utils.h"
 
diff --git a/cpp/src/core/test/utils.h b/cpp/src/core/test/utils.h
index ca56fedb2c..b9db01de51 100644
--- a/cpp/src/core/test/utils.h
+++ b/cpp/src/core/test/utils.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/core/todo b/cpp/src/core/todo
deleted file mode 100644
index eeb0a69915..0000000000
--- a/cpp/src/core/todo
+++ /dev/null
@@ -1,2 +0,0 @@
-1. Support L2 and IP
-2. replace with RapidJson
\ No newline at end of file
diff --git a/cpp/src/db/Constants.h b/cpp/src/db/Constants.h
index 479f670563..aa254b0bd6 100644
--- a/cpp/src/db/Constants.h
+++ b/cpp/src/db/Constants.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <stdint.h>
diff --git a/cpp/src/db/DB.h b/cpp/src/db/DB.h
index 4dc4e562c8..1de424ed78 100644
--- a/cpp/src/db/DB.h
+++ b/cpp/src/db/DB.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Options.h"
diff --git a/cpp/src/db/DBFactory.cpp b/cpp/src/db/DBFactory.cpp
index b04067c38a..eb13c309fc 100644
--- a/cpp/src/db/DBFactory.cpp
+++ b/cpp/src/db/DBFactory.cpp
@@ -1,12 +1,24 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "DBFactory.h"
 #include "DBImpl.h"
-#include "Exception.h"
+#include "utils/Exception.h"
 #include "meta/MetaFactory.h"
 #include "meta/SqliteMetaImpl.h"
 #include "meta/MySQLMetaImpl.h"
diff --git a/cpp/src/db/DBFactory.h b/cpp/src/db/DBFactory.h
index a9404ccd1b..7de4396846 100644
--- a/cpp/src/db/DBFactory.h
+++ b/cpp/src/db/DBFactory.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "DB.h"
diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 80b1994778..648038de25 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -1,31 +1,42 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "DBImpl.h"
-#include "src/db/meta/SqliteMetaImpl.h"
-#include "Log.h"
-#include "Utils.h"
+#include "cache/CpuCacheMgr.h"
+#include "cache/GpuCacheMgr.h"
 #include "engine/EngineFactory.h"
 #include "insert/MemMenagerFactory.h"
+#include "meta/SqliteMetaImpl.h"
 #include "meta/MetaFactory.h"
+#include "meta/MetaConsts.h"
 #include "metrics/Metrics.h"
 #include "scheduler/TaskScheduler.h"
-
 #include "scheduler/context/DeleteContext.h"
+#include "scheduler/SchedInst.h"
 #include "utils/TimeRecorder.h"
-#include "meta/MetaConsts.h"
+#include "utils/Log.h"
+#include "Utils.h"
 
 #include <assert.h>
 #include <chrono>
 #include <thread>
 #include <iostream>
 #include <cstring>
-#include <cache/CpuCacheMgr.h>
 #include <boost/filesystem.hpp>
-#include "scheduler/SchedInst.h"
-#include <src/cache/GpuCacheMgr.h>
 
 namespace zilliz {
 namespace milvus {
@@ -409,7 +420,7 @@ Status DBImpl::QueryAsync(const std::string& table_id, const meta::TableFilesSch
                           const meta::DatesT& dates, QueryResults& results) {
     server::CollectQueryMetrics metrics(nq);
 
-    server::TimeRecorder rc("");
+    TimeRecorder rc("");
 
     //step 1: get files to search
     ENGINE_LOG_DEBUG << "Engine query begin, index file count: " << files.size() << " date range count: " << dates.size();
@@ -432,9 +443,9 @@ Status DBImpl::QueryAsync(const std::string& table_id, const meta::TableFilesSch
     double load_cost = context->LoadCost();
     double search_cost = context->SearchCost();
     double reduce_cost = context->ReduceCost();
-    std::string load_info = server::TimeRecorder::GetTimeSpanStr(load_cost);
-    std::string search_info = server::TimeRecorder::GetTimeSpanStr(search_cost);
-    std::string reduce_info = server::TimeRecorder::GetTimeSpanStr(reduce_cost);
+    std::string load_info = TimeRecorder::GetTimeSpanStr(load_cost);
+    std::string search_info = TimeRecorder::GetTimeSpanStr(search_cost);
+    std::string reduce_info = TimeRecorder::GetTimeSpanStr(reduce_cost);
     if(search_cost > 0.0 || reduce_cost > 0.0) {
         double total_cost = load_cost + search_cost + reduce_cost;
         double load_percent = load_cost/total_cost;
diff --git a/cpp/src/db/DBImpl.h b/cpp/src/db/DBImpl.h
index e4bfbd5d34..85803b763f 100644
--- a/cpp/src/db/DBImpl.h
+++ b/cpp/src/db/DBImpl.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "DB.h"
@@ -128,11 +140,11 @@ class DBImpl : public DB {
     MemManagerPtr mem_mgr_;
     std::mutex mem_serialize_mutex_;
 
-    server::ThreadPool compact_thread_pool_;
+    ThreadPool compact_thread_pool_;
     std::list<std::future<void>> compact_thread_results_;
     std::set<std::string> compact_table_ids_;
 
-    server::ThreadPool index_thread_pool_;
+    ThreadPool index_thread_pool_;
     std::list<std::future<void>> index_thread_results_;
 
     std::mutex build_index_mutex_;
diff --git a/cpp/src/db/IDGenerator.cpp b/cpp/src/db/IDGenerator.cpp
index 74d3a1433a..a82ccee629 100644
--- a/cpp/src/db/IDGenerator.cpp
+++ b/cpp/src/db/IDGenerator.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "IDGenerator.h"
 
 #include <chrono>
diff --git a/cpp/src/db/IDGenerator.h b/cpp/src/db/IDGenerator.h
index eb39221734..fc408697dd 100644
--- a/cpp/src/db/IDGenerator.h
+++ b/cpp/src/db/IDGenerator.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Types.h"
diff --git a/cpp/src/db/Log.h b/cpp/src/db/Log.h
deleted file mode 100644
index f36d861c3e..0000000000
--- a/cpp/src/db/Log.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
-#pragma once
-
-#include "utils/easylogging++.h"
-
-namespace zilliz {
-namespace milvus {
-namespace engine {
-
-#define ENGINE_DOMAIN_NAME "[ENGINE] "
-#define ENGINE_ERROR_TEXT "ENGINE Error:"
-
-#define ENGINE_LOG_TRACE LOG(TRACE) << ENGINE_DOMAIN_NAME
-#define ENGINE_LOG_DEBUG LOG(DEBUG) << ENGINE_DOMAIN_NAME
-#define ENGINE_LOG_INFO LOG(INFO) << ENGINE_DOMAIN_NAME
-#define ENGINE_LOG_WARNING LOG(WARNING) << ENGINE_DOMAIN_NAME
-#define ENGINE_LOG_ERROR LOG(ERROR) << ENGINE_DOMAIN_NAME
-#define ENGINE_LOG_FATAL LOG(FATAL) << ENGINE_DOMAIN_NAME
-
-} // namespace sql
-} // namespace zilliz
-} // namespace server
diff --git a/cpp/src/db/Options.cpp b/cpp/src/db/Options.cpp
index ecebd30bdb..9abc8e66ec 100644
--- a/cpp/src/db/Options.cpp
+++ b/cpp/src/db/Options.cpp
@@ -1,16 +1,27 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
-#include <stdlib.h>
-#include <assert.h>
-#include "utils/easylogging++.h"
-#include <boost/algorithm/string.hpp>
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
 #include "Options.h"
-#include "db/meta/SqliteMetaImpl.h"
-#include "Exception.h"
+#include "utils/Exception.h"
+#include "utils/easylogging++.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <boost/algorithm/string.hpp>
 
 namespace zilliz {
 namespace milvus {
diff --git a/cpp/src/db/Options.h b/cpp/src/db/Options.h
index 4cd262ccfa..c5b4648c6d 100644
--- a/cpp/src/db/Options.h
+++ b/cpp/src/db/Options.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Constants.h"
diff --git a/cpp/src/db/Status.cpp b/cpp/src/db/Status.cpp
index d19b1e66ff..0bc51ca59e 100644
--- a/cpp/src/db/Status.cpp
+++ b/cpp/src/db/Status.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <stdio.h>
 #include <cstring>
 #include <assert.h>
diff --git a/cpp/src/db/Status.h b/cpp/src/db/Status.h
index 60733a5548..e3dae4c0ad 100644
--- a/cpp/src/db/Status.h
+++ b/cpp/src/db/Status.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/db/Types.h b/cpp/src/db/Types.h
index 322b22048a..d927ecab5f 100644
--- a/cpp/src/db/Types.h
+++ b/cpp/src/db/Types.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "db/engine/ExecutionEngine.h"
diff --git a/cpp/src/db/Utils.cpp b/cpp/src/db/Utils.cpp
index 2c9173f6a7..cbc3ba45b6 100644
--- a/cpp/src/db/Utils.cpp
+++ b/cpp/src/db/Utils.cpp
@@ -1,11 +1,23 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "Utils.h"
 #include "utils/CommonUtil.h"
-#include "Log.h"
+#include "utils/Log.h"
 
 #include <mutex>
 #include <chrono>
diff --git a/cpp/src/db/Utils.h b/cpp/src/db/Utils.h
index 2094250a1f..f27273c6fe 100644
--- a/cpp/src/db/Utils.h
+++ b/cpp/src/db/Utils.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Options.h"
diff --git a/cpp/src/db/engine/EngineFactory.cpp b/cpp/src/db/engine/EngineFactory.cpp
index a326d6a2c6..d50cc8ad3e 100644
--- a/cpp/src/db/engine/EngineFactory.cpp
+++ b/cpp/src/db/engine/EngineFactory.cpp
@@ -1,11 +1,23 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "EngineFactory.h"
 #include "ExecutionEngineImpl.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 
 namespace zilliz {
 namespace milvus {
diff --git a/cpp/src/db/engine/EngineFactory.h b/cpp/src/db/engine/EngineFactory.h
index 7f2047af9b..906260b966 100644
--- a/cpp/src/db/engine/EngineFactory.h
+++ b/cpp/src/db/engine/EngineFactory.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/engine/ExecutionEngine.h b/cpp/src/db/engine/ExecutionEngine.h
index 4b59baf28e..417d002a21 100644
--- a/cpp/src/db/engine/ExecutionEngine.h
+++ b/cpp/src/db/engine/ExecutionEngine.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/engine/ExecutionEngineImpl.cpp b/cpp/src/db/engine/ExecutionEngineImpl.cpp
index 9ddb864e0d..7ad9d3ea12 100644
--- a/cpp/src/db/engine/ExecutionEngineImpl.cpp
+++ b/cpp/src/db/engine/ExecutionEngineImpl.cpp
@@ -1,22 +1,33 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
-#include <stdexcept>
-#include "src/cache/GpuCacheMgr.h"
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
-#include "src/metrics/Metrics.h"
-#include "db/Log.h"
-#include "utils/CommonUtil.h"
-
-#include "src/cache/CpuCacheMgr.h"
 #include "ExecutionEngineImpl.h"
+#include "cache/GpuCacheMgr.h"
+#include "cache/CpuCacheMgr.h"
+#include "metrics/Metrics.h"
+#include "utils/Log.h"
+#include "utils/CommonUtil.h"
+#include "utils/Exception.h"
+
 #include "wrapper/knowhere/vec_index.h"
 #include "wrapper/knowhere/vec_impl.h"
 #include "knowhere/common/exception.h"
-#include "db/Exception.h"
 
+#include <stdexcept>
 
 namespace zilliz {
 namespace milvus {
@@ -124,7 +135,7 @@ Status ExecutionEngineImpl::Serialize() {
 }
 
 Status ExecutionEngineImpl::Load(bool to_cache) {
-    index_ = zilliz::milvus::cache::CpuCacheMgr::GetInstance()->GetIndex(location_);
+    index_ = cache::CpuCacheMgr::GetInstance()->GetIndex(location_);
     bool already_in_cache = (index_ != nullptr);
     if (!already_in_cache) {
         try {
@@ -151,7 +162,7 @@ Status ExecutionEngineImpl::Load(bool to_cache) {
 }
 
 Status ExecutionEngineImpl::CopyToGpu(uint64_t device_id) {
-    auto index = zilliz::milvus::cache::GpuCacheMgr::GetInstance(device_id)->GetIndex(location_);
+    auto index = cache::GpuCacheMgr::GetInstance(device_id)->GetIndex(location_);
     bool already_in_cache = (index != nullptr);
     if (already_in_cache) {
         index_ = index;
@@ -178,7 +189,7 @@ Status ExecutionEngineImpl::CopyToGpu(uint64_t device_id) {
 }
 
 Status ExecutionEngineImpl::CopyToCpu() {
-    auto index = zilliz::milvus::cache::CpuCacheMgr::GetInstance()->GetIndex(location_);
+    auto index = cache::CpuCacheMgr::GetInstance()->GetIndex(location_);
     bool already_in_cache = (index != nullptr);
     if (already_in_cache) {
         index_ = index;
@@ -221,7 +232,7 @@ Status ExecutionEngineImpl::Merge(const std::string &location) {
     }
     ENGINE_LOG_DEBUG << "Merge index file: " << location << " to: " << location_;
 
-    auto to_merge = zilliz::milvus::cache::CpuCacheMgr::GetInstance()->GetIndex(location);
+    auto to_merge = cache::CpuCacheMgr::GetInstance()->GetIndex(location);
     if (!to_merge) {
         try {
             double physical_size = server::CommonUtil::GetFileSize(location);
diff --git a/cpp/src/db/engine/ExecutionEngineImpl.h b/cpp/src/db/engine/ExecutionEngineImpl.h
index e5480322a2..611a247a08 100644
--- a/cpp/src/db/engine/ExecutionEngineImpl.h
+++ b/cpp/src/db/engine/ExecutionEngineImpl.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "ExecutionEngine.h"
diff --git a/cpp/src/db/insert/MemManager.h b/cpp/src/db/insert/MemManager.h
index 81fd3c1108..de6ee85ed1 100644
--- a/cpp/src/db/insert/MemManager.h
+++ b/cpp/src/db/insert/MemManager.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/insert/MemManagerImpl.cpp b/cpp/src/db/insert/MemManagerImpl.cpp
index 240b2f2bb0..35dd227b6c 100644
--- a/cpp/src/db/insert/MemManagerImpl.cpp
+++ b/cpp/src/db/insert/MemManagerImpl.cpp
@@ -1,6 +1,24 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "MemManagerImpl.h"
 #include "VectorSource.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 #include "db/Constants.h"
 
 #include <thread>
diff --git a/cpp/src/db/insert/MemManagerImpl.h b/cpp/src/db/insert/MemManagerImpl.h
index a17a90c2cd..9b503216a7 100644
--- a/cpp/src/db/insert/MemManagerImpl.h
+++ b/cpp/src/db/insert/MemManagerImpl.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/meta/Meta.h"
diff --git a/cpp/src/db/insert/MemMenagerFactory.cpp b/cpp/src/db/insert/MemMenagerFactory.cpp
index 965ba596bd..d8620e908c 100644
--- a/cpp/src/db/insert/MemMenagerFactory.cpp
+++ b/cpp/src/db/insert/MemMenagerFactory.cpp
@@ -1,13 +1,24 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
 #include "MemMenagerFactory.h"
 #include "MemManagerImpl.h"
-#include "db/Log.h"
-#include "db/Exception.h"
+#include "utils/Log.h"
+#include "utils/Exception.h"
 
 #include <stdlib.h>
 #include <time.h>
diff --git a/cpp/src/db/insert/MemMenagerFactory.h b/cpp/src/db/insert/MemMenagerFactory.h
index f20103a0eb..4bf4267c87 100644
--- a/cpp/src/db/insert/MemMenagerFactory.h
+++ b/cpp/src/db/insert/MemMenagerFactory.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "MemManager.h"
diff --git a/cpp/src/db/insert/MemTable.cpp b/cpp/src/db/insert/MemTable.cpp
index fe6cdf0967..6bd5274d9e 100644
--- a/cpp/src/db/insert/MemTable.cpp
+++ b/cpp/src/db/insert/MemTable.cpp
@@ -1,5 +1,23 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "MemTable.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 
 
 namespace zilliz {
diff --git a/cpp/src/db/insert/MemTable.h b/cpp/src/db/insert/MemTable.h
index 54744e5214..a443186900 100644
--- a/cpp/src/db/insert/MemTable.h
+++ b/cpp/src/db/insert/MemTable.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/insert/MemTableFile.cpp b/cpp/src/db/insert/MemTableFile.cpp
index 946b658b4b..63a968986d 100644
--- a/cpp/src/db/insert/MemTableFile.cpp
+++ b/cpp/src/db/insert/MemTableFile.cpp
@@ -1,8 +1,26 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "MemTableFile.h"
 #include "db/Constants.h"
-#include "db/Log.h"
 #include "db/engine/EngineFactory.h"
 #include "metrics/Metrics.h"
+#include "utils/Log.h"
 
 #include <cmath>
 
diff --git a/cpp/src/db/insert/MemTableFile.h b/cpp/src/db/insert/MemTableFile.h
index b816e9cddd..d4b11cda7a 100644
--- a/cpp/src/db/insert/MemTableFile.h
+++ b/cpp/src/db/insert/MemTableFile.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/insert/VectorSource.cpp b/cpp/src/db/insert/VectorSource.cpp
index f7d6a48297..d0aeb5f1ef 100644
--- a/cpp/src/db/insert/VectorSource.cpp
+++ b/cpp/src/db/insert/VectorSource.cpp
@@ -1,7 +1,25 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "VectorSource.h"
 #include "db/engine/ExecutionEngine.h"
 #include "db/engine/EngineFactory.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 #include "metrics/Metrics.h"
 
 
diff --git a/cpp/src/db/insert/VectorSource.h b/cpp/src/db/insert/VectorSource.h
index 23cce9bc2c..5c44f580d2 100644
--- a/cpp/src/db/insert/VectorSource.h
+++ b/cpp/src/db/insert/VectorSource.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/db/meta/Meta.h b/cpp/src/db/meta/Meta.h
index 35f5e938a0..755e0170f2 100644
--- a/cpp/src/db/meta/Meta.h
+++ b/cpp/src/db/meta/Meta.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "MetaTypes.h"
diff --git a/cpp/src/db/meta/MetaConsts.h b/cpp/src/db/meta/MetaConsts.h
index ef0a207eae..04b548009b 100644
--- a/cpp/src/db/meta/MetaConsts.h
+++ b/cpp/src/db/meta/MetaConsts.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 namespace zilliz {
diff --git a/cpp/src/db/meta/MetaFactory.cpp b/cpp/src/db/meta/MetaFactory.cpp
index 9e025658af..2f498941d4 100644
--- a/cpp/src/db/meta/MetaFactory.cpp
+++ b/cpp/src/db/meta/MetaFactory.cpp
@@ -1,14 +1,25 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
 #include "MetaFactory.h"
 #include "SqliteMetaImpl.h"
 #include "MySQLMetaImpl.h"
-#include "db/Log.h"
-#include "db/Exception.h"
+#include "utils/Log.h"
+#include "utils/Exception.h"
 
 #include <stdlib.h>
 #include <time.h>
diff --git a/cpp/src/db/meta/MetaFactory.h b/cpp/src/db/meta/MetaFactory.h
index fa964c3094..edc9706649 100644
--- a/cpp/src/db/meta/MetaFactory.h
+++ b/cpp/src/db/meta/MetaFactory.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Meta.h"
diff --git a/cpp/src/db/meta/MetaTypes.h b/cpp/src/db/meta/MetaTypes.h
index e31be40ddc..cc6dd52057 100644
--- a/cpp/src/db/meta/MetaTypes.h
+++ b/cpp/src/db/meta/MetaTypes.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "db/engine/ExecutionEngine.h"
@@ -25,9 +37,9 @@ constexpr int32_t DEFAULT_INDEX_FILE_SIZE = ONE_GB;
 constexpr int64_t FLAG_MASK_NO_USERID = 0x1;
 constexpr int64_t FLAG_MASK_HAS_USERID = 0x1<<1;
 
-typedef int DateT;
+using DateT = int ;
 const DateT EmptyDate = -1;
-typedef std::vector<DateT> DatesT;
+using DatesT = std::vector<DateT>;
 
 struct TableSchema {
     typedef enum {
@@ -76,8 +88,9 @@ struct TableFileSchema {
     int32_t metric_type_ = DEFAULT_METRIC_TYPE; //not persist to meta
 }; // TableFileSchema
 
-typedef std::vector<TableFileSchema> TableFilesSchema;
-typedef std::map<DateT, TableFilesSchema> DatePartionedTableFilesSchema;
+using TableFileSchemaPtr = std::shared_ptr<meta::TableFileSchema>;
+using TableFilesSchema = std::vector<TableFileSchema>;
+using DatePartionedTableFilesSchema = std::map<DateT, TableFilesSchema>;
 
 } // namespace meta
 } // namespace engine
diff --git a/cpp/src/db/meta/MySQLConnectionPool.cpp b/cpp/src/db/meta/MySQLConnectionPool.cpp
index 8e82dc5ae7..87998122f4 100644
--- a/cpp/src/db/meta/MySQLConnectionPool.cpp
+++ b/cpp/src/db/meta/MySQLConnectionPool.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "MySQLConnectionPool.h"
 
 namespace zilliz {
diff --git a/cpp/src/db/meta/MySQLConnectionPool.h b/cpp/src/db/meta/MySQLConnectionPool.h
index 9cde818b45..4aadafd714 100644
--- a/cpp/src/db/meta/MySQLConnectionPool.h
+++ b/cpp/src/db/meta/MySQLConnectionPool.h
@@ -1,10 +1,28 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "mysql++/mysql++.h"
 
 #include <string>
 #include <unistd.h>
 #include <atomic>
 
-#include "db/Log.h"
+#include "utils/Log.h"
 
 namespace zilliz {
 namespace milvus {
diff --git a/cpp/src/db/meta/MySQLMetaImpl.cpp b/cpp/src/db/meta/MySQLMetaImpl.cpp
index 6c89471741..ccd7e79ada 100644
--- a/cpp/src/db/meta/MySQLMetaImpl.cpp
+++ b/cpp/src/db/meta/MySQLMetaImpl.cpp
@@ -1,12 +1,24 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "MySQLMetaImpl.h"
 #include "db/IDGenerator.h"
 #include "db/Utils.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 #include "MetaConsts.h"
 #include "metrics/Metrics.h"
 
diff --git a/cpp/src/db/meta/MySQLMetaImpl.h b/cpp/src/db/meta/MySQLMetaImpl.h
index 97604ef3ea..dca109b231 100644
--- a/cpp/src/db/meta/MySQLMetaImpl.h
+++ b/cpp/src/db/meta/MySQLMetaImpl.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Meta.h"
diff --git a/cpp/src/db/meta/SqliteMetaImpl.cpp b/cpp/src/db/meta/SqliteMetaImpl.cpp
index 38941abf38..564a8eae4d 100644
--- a/cpp/src/db/meta/SqliteMetaImpl.cpp
+++ b/cpp/src/db/meta/SqliteMetaImpl.cpp
@@ -1,12 +1,24 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "SqliteMetaImpl.h"
 #include "db/IDGenerator.h"
 #include "db/Utils.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 #include "MetaConsts.h"
 #include "metrics/Metrics.h"
 
diff --git a/cpp/src/db/meta/SqliteMetaImpl.h b/cpp/src/db/meta/SqliteMetaImpl.h
index 641dcc40ec..b1465dd95a 100644
--- a/cpp/src/db/meta/SqliteMetaImpl.h
+++ b/cpp/src/db/meta/SqliteMetaImpl.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Meta.h"
diff --git a/cpp/src/db/scheduler/TaskDispatchQueue.cpp b/cpp/src/db/scheduler/TaskDispatchQueue.cpp
index e1bf7b75f5..41a95060a8 100644
--- a/cpp/src/db/scheduler/TaskDispatchQueue.cpp
+++ b/cpp/src/db/scheduler/TaskDispatchQueue.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "TaskDispatchQueue.h"
 #include "TaskDispatchStrategy.h"
diff --git a/cpp/src/db/scheduler/TaskDispatchQueue.h b/cpp/src/db/scheduler/TaskDispatchQueue.h
index 435be4f597..b8a0dd611e 100644
--- a/cpp/src/db/scheduler/TaskDispatchQueue.h
+++ b/cpp/src/db/scheduler/TaskDispatchQueue.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "context/IScheduleContext.h"
diff --git a/cpp/src/db/scheduler/TaskDispatchStrategy.cpp b/cpp/src/db/scheduler/TaskDispatchStrategy.cpp
index 38c9463117..6ce9e582de 100644
--- a/cpp/src/db/scheduler/TaskDispatchStrategy.cpp
+++ b/cpp/src/db/scheduler/TaskDispatchStrategy.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "TaskDispatchStrategy.h"
 #include "context/SearchContext.h"
 #include "context/DeleteContext.h"
@@ -10,7 +22,7 @@
 #include "task/DeleteTask.h"
 #include "cache/CpuCacheMgr.h"
 #include "utils/Error.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 
 namespace zilliz {
 namespace milvus {
diff --git a/cpp/src/db/scheduler/TaskDispatchStrategy.h b/cpp/src/db/scheduler/TaskDispatchStrategy.h
index d835e3ce86..8d1b51605e 100644
--- a/cpp/src/db/scheduler/TaskDispatchStrategy.h
+++ b/cpp/src/db/scheduler/TaskDispatchStrategy.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "context/IScheduleContext.h"
diff --git a/cpp/src/db/scheduler/TaskScheduler.cpp b/cpp/src/db/scheduler/TaskScheduler.cpp
index 3e1807b8c5..a546dbabf1 100644
--- a/cpp/src/db/scheduler/TaskScheduler.cpp
+++ b/cpp/src/db/scheduler/TaskScheduler.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "server/ServerConfig.h"
 #include "TaskScheduler.h"
diff --git a/cpp/src/db/scheduler/TaskScheduler.h b/cpp/src/db/scheduler/TaskScheduler.h
index f4556696ec..86feb37f8f 100644
--- a/cpp/src/db/scheduler/TaskScheduler.h
+++ b/cpp/src/db/scheduler/TaskScheduler.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "context/IScheduleContext.h"
diff --git a/cpp/src/db/scheduler/context/DeleteContext.cpp b/cpp/src/db/scheduler/context/DeleteContext.cpp
index 9207697c5f..32ec2f8f09 100644
--- a/cpp/src/db/scheduler/context/DeleteContext.cpp
+++ b/cpp/src/db/scheduler/context/DeleteContext.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "DeleteContext.h"
 
diff --git a/cpp/src/db/scheduler/context/DeleteContext.h b/cpp/src/db/scheduler/context/DeleteContext.h
index 6c21d1e65a..7132acc827 100644
--- a/cpp/src/db/scheduler/context/DeleteContext.h
+++ b/cpp/src/db/scheduler/context/DeleteContext.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "IScheduleContext.h"
diff --git a/cpp/src/db/scheduler/context/IScheduleContext.h b/cpp/src/db/scheduler/context/IScheduleContext.h
index 6ae56e364e..1ac347526c 100644
--- a/cpp/src/db/scheduler/context/IScheduleContext.h
+++ b/cpp/src/db/scheduler/context/IScheduleContext.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <memory>
diff --git a/cpp/src/db/scheduler/context/SearchContext.cpp b/cpp/src/db/scheduler/context/SearchContext.cpp
index 4043f04159..ae9ced5938 100644
--- a/cpp/src/db/scheduler/context/SearchContext.cpp
+++ b/cpp/src/db/scheduler/context/SearchContext.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "SearchContext.h"
 #include "utils/Log.h"
diff --git a/cpp/src/db/scheduler/context/SearchContext.h b/cpp/src/db/scheduler/context/SearchContext.h
index a950962b6e..3aee2c436e 100644
--- a/cpp/src/db/scheduler/context/SearchContext.h
+++ b/cpp/src/db/scheduler/context/SearchContext.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "IScheduleContext.h"
diff --git a/cpp/src/db/scheduler/task/DeleteTask.cpp b/cpp/src/db/scheduler/task/DeleteTask.cpp
index 975a595e6f..310b844ff9 100644
--- a/cpp/src/db/scheduler/task/DeleteTask.cpp
+++ b/cpp/src/db/scheduler/task/DeleteTask.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "DeleteTask.h"
 
diff --git a/cpp/src/db/scheduler/task/DeleteTask.h b/cpp/src/db/scheduler/task/DeleteTask.h
index 866f0a7789..362b125c92 100644
--- a/cpp/src/db/scheduler/task/DeleteTask.h
+++ b/cpp/src/db/scheduler/task/DeleteTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "IScheduleTask.h"
diff --git a/cpp/src/db/scheduler/task/IScheduleTask.h b/cpp/src/db/scheduler/task/IScheduleTask.h
index 652a1739fe..07025a7d72 100644
--- a/cpp/src/db/scheduler/task/IScheduleTask.h
+++ b/cpp/src/db/scheduler/task/IScheduleTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <memory>
diff --git a/cpp/src/db/scheduler/task/IndexLoadTask.cpp b/cpp/src/db/scheduler/task/IndexLoadTask.cpp
index 4efb041d61..be83b86683 100644
--- a/cpp/src/db/scheduler/task/IndexLoadTask.cpp
+++ b/cpp/src/db/scheduler/task/IndexLoadTask.cpp
@@ -1,13 +1,25 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "IndexLoadTask.h"
 #include "SearchTask.h"
-#include "db/Log.h"
 #include "db/engine/EngineFactory.h"
+#include "utils/Log.h"
 #include "utils/TimeRecorder.h"
 #include "metrics/Metrics.h"
 
diff --git a/cpp/src/db/scheduler/task/IndexLoadTask.h b/cpp/src/db/scheduler/task/IndexLoadTask.h
index c3548d7311..29356e5f58 100644
--- a/cpp/src/db/scheduler/task/IndexLoadTask.h
+++ b/cpp/src/db/scheduler/task/IndexLoadTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "IScheduleTask.h"
diff --git a/cpp/src/db/scheduler/task/SearchTask.cpp b/cpp/src/db/scheduler/task/SearchTask.cpp
index 5117dc948c..d0962ec101 100644
--- a/cpp/src/db/scheduler/task/SearchTask.cpp
+++ b/cpp/src/db/scheduler/task/SearchTask.cpp
@@ -1,11 +1,23 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "SearchTask.h"
 #include "metrics/Metrics.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 #include "utils/TimeRecorder.h"
 
 #include <thread>
diff --git a/cpp/src/db/scheduler/task/SearchTask.h b/cpp/src/db/scheduler/task/SearchTask.h
index 88a51c2c84..47c4813fd2 100644
--- a/cpp/src/db/scheduler/task/SearchTask.h
+++ b/cpp/src/db/scheduler/task/SearchTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "IScheduleTask.h"
diff --git a/cpp/src/main.cpp b/cpp/src/main.cpp
index e31e286652..d9b160d6e0 100644
--- a/cpp/src/main.cpp
+++ b/cpp/src/main.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "server/Server.h"
 #include "version.h"
 
diff --git a/cpp/src/metrics/MetricBase.h b/cpp/src/metrics/MetricBase.h
index 315eaa0f88..aa181fb3f3 100644
--- a/cpp/src/metrics/MetricBase.h
+++ b/cpp/src/metrics/MetricBase.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/metrics/Metrics.cpp b/cpp/src/metrics/Metrics.cpp
index 23fb0a15b8..10ddd7ee3c 100644
--- a/cpp/src/metrics/Metrics.cpp
+++ b/cpp/src/metrics/Metrics.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "Metrics.h"
 #include "PrometheusMetrics.h"
 
diff --git a/cpp/src/metrics/Metrics.h b/cpp/src/metrics/Metrics.h
index 83b082fe46..e298af7acf 100644
--- a/cpp/src/metrics/Metrics.h
+++ b/cpp/src/metrics/Metrics.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "MetricBase.h"
diff --git a/cpp/src/metrics/PrometheusMetrics.cpp b/cpp/src/metrics/PrometheusMetrics.cpp
index 07ca9aa301..f4d70a21c3 100644
--- a/cpp/src/metrics/PrometheusMetrics.cpp
+++ b/cpp/src/metrics/PrometheusMetrics.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <cache/GpuCacheMgr.h>
 #include "PrometheusMetrics.h"
diff --git a/cpp/src/metrics/PrometheusMetrics.h b/cpp/src/metrics/PrometheusMetrics.h
index 70443d6331..5a3379305a 100644
--- a/cpp/src/metrics/PrometheusMetrics.h
+++ b/cpp/src/metrics/PrometheusMetrics.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/metrics/SystemInfo.cpp b/cpp/src/metrics/SystemInfo.cpp
index 3b6698d42b..61ae42c438 100644
--- a/cpp/src/metrics/SystemInfo.cpp
+++ b/cpp/src/metrics/SystemInfo.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "SystemInfo.h"
 
diff --git a/cpp/src/metrics/SystemInfo.h b/cpp/src/metrics/SystemInfo.h
index ab27375c73..9089c7cddb 100644
--- a/cpp/src/metrics/SystemInfo.h
+++ b/cpp/src/metrics/SystemInfo.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/scheduler/Algorithm.cpp b/cpp/src/scheduler/Algorithm.cpp
index f8ad0212d4..0a9aefbce0 100644
--- a/cpp/src/scheduler/Algorithm.cpp
+++ b/cpp/src/scheduler/Algorithm.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "Algorithm.h"
 
diff --git a/cpp/src/scheduler/Algorithm.h b/cpp/src/scheduler/Algorithm.h
index 05d9ad71d8..763ef8ad5d 100644
--- a/cpp/src/scheduler/Algorithm.h
+++ b/cpp/src/scheduler/Algorithm.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "resource/Resource.h"
 #include "ResourceMgr.h"
diff --git a/cpp/src/scheduler/ResourceFactory.cpp b/cpp/src/scheduler/ResourceFactory.cpp
index 71137c361a..40cd00f206 100644
--- a/cpp/src/scheduler/ResourceFactory.cpp
+++ b/cpp/src/scheduler/ResourceFactory.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "ResourceFactory.h"
 
diff --git a/cpp/src/scheduler/ResourceFactory.h b/cpp/src/scheduler/ResourceFactory.h
index 84549c62f1..58a29497b0 100644
--- a/cpp/src/scheduler/ResourceFactory.h
+++ b/cpp/src/scheduler/ResourceFactory.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/scheduler/ResourceMgr.cpp b/cpp/src/scheduler/ResourceMgr.cpp
index cbbf449763..dafc15713a 100644
--- a/cpp/src/scheduler/ResourceMgr.cpp
+++ b/cpp/src/scheduler/ResourceMgr.cpp
@@ -1,11 +1,23 @@
 
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ResourceMgr.h"
-#include "db/Log.h"
+#include "utils/Log.h"
 
 
 namespace zilliz {
diff --git a/cpp/src/scheduler/ResourceMgr.h b/cpp/src/scheduler/ResourceMgr.h
index 114cc778e1..ebe0894770 100644
--- a/cpp/src/scheduler/ResourceMgr.h
+++ b/cpp/src/scheduler/ResourceMgr.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/scheduler/SchedInst.cpp b/cpp/src/scheduler/SchedInst.cpp
index df71e69af3..5432227523 100644
--- a/cpp/src/scheduler/SchedInst.cpp
+++ b/cpp/src/scheduler/SchedInst.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "SchedInst.h"
 #include "server/ServerConfig.h"
diff --git a/cpp/src/scheduler/SchedInst.h b/cpp/src/scheduler/SchedInst.h
index 92f3575ebc..fe73aae362 100644
--- a/cpp/src/scheduler/SchedInst.h
+++ b/cpp/src/scheduler/SchedInst.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "ResourceMgr.h"
diff --git a/cpp/src/scheduler/Scheduler.cpp b/cpp/src/scheduler/Scheduler.cpp
index e70eecc00d..6aa4501e29 100644
--- a/cpp/src/scheduler/Scheduler.cpp
+++ b/cpp/src/scheduler/Scheduler.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <src/cache/GpuCacheMgr.h>
 #include "event/LoadCompletedEvent.h"
diff --git a/cpp/src/scheduler/Scheduler.h b/cpp/src/scheduler/Scheduler.h
index c2a36069b9..0de80d5cc5 100644
--- a/cpp/src/scheduler/Scheduler.h
+++ b/cpp/src/scheduler/Scheduler.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <memory>
diff --git a/cpp/src/scheduler/TaskTable.cpp b/cpp/src/scheduler/TaskTable.cpp
index 91d0bd7052..1678665593 100644
--- a/cpp/src/scheduler/TaskTable.cpp
+++ b/cpp/src/scheduler/TaskTable.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "TaskTable.h"
 #include "event/TaskTableUpdatedEvent.h"
diff --git a/cpp/src/scheduler/TaskTable.h b/cpp/src/scheduler/TaskTable.h
index 7b064f20d4..c4be442d11 100644
--- a/cpp/src/scheduler/TaskTable.h
+++ b/cpp/src/scheduler/TaskTable.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <vector>
diff --git a/cpp/src/scheduler/Utils.cpp b/cpp/src/scheduler/Utils.cpp
index 6c1f6372be..b011751105 100644
--- a/cpp/src/scheduler/Utils.cpp
+++ b/cpp/src/scheduler/Utils.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "Utils.h"
 
diff --git a/cpp/src/scheduler/Utils.h b/cpp/src/scheduler/Utils.h
index c00325db17..066695b35b 100644
--- a/cpp/src/scheduler/Utils.h
+++ b/cpp/src/scheduler/Utils.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <cstdint>
 
diff --git a/cpp/src/scheduler/action/Action.h b/cpp/src/scheduler/action/Action.h
index 7c7b4c3bec..4af8e1cfee 100644
--- a/cpp/src/scheduler/action/Action.h
+++ b/cpp/src/scheduler/action/Action.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "../resource/Resource.h"
diff --git a/cpp/src/scheduler/action/PushTaskToNeighbour.cpp b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
index 3de0165b0f..05f997e96d 100644
--- a/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
+++ b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <list>
 #include <random>
diff --git a/cpp/src/scheduler/event/Event.h b/cpp/src/scheduler/event/Event.h
index c022f96788..af8be5ecf0 100644
--- a/cpp/src/scheduler/event/Event.h
+++ b/cpp/src/scheduler/event/Event.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <memory>
diff --git a/cpp/src/scheduler/event/EventDump.cpp b/cpp/src/scheduler/event/EventDump.cpp
index ceee63ba9d..384fd98e8d 100644
--- a/cpp/src/scheduler/event/EventDump.cpp
+++ b/cpp/src/scheduler/event/EventDump.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "Event.h"
 #include "StartUpEvent.h"
diff --git a/cpp/src/scheduler/event/FinishTaskEvent.h b/cpp/src/scheduler/event/FinishTaskEvent.h
index 14daa9b532..3c88a62693 100644
--- a/cpp/src/scheduler/event/FinishTaskEvent.h
+++ b/cpp/src/scheduler/event/FinishTaskEvent.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Event.h"
diff --git a/cpp/src/scheduler/event/LoadCompletedEvent.h b/cpp/src/scheduler/event/LoadCompletedEvent.h
index c59b6256cb..7e7abaa697 100644
--- a/cpp/src/scheduler/event/LoadCompletedEvent.h
+++ b/cpp/src/scheduler/event/LoadCompletedEvent.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Event.h"
diff --git a/cpp/src/scheduler/event/StartUpEvent.h b/cpp/src/scheduler/event/StartUpEvent.h
index 4b5ec78cd6..0ae4db5ce0 100644
--- a/cpp/src/scheduler/event/StartUpEvent.h
+++ b/cpp/src/scheduler/event/StartUpEvent.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Event.h"
diff --git a/cpp/src/scheduler/event/TaskTableUpdatedEvent.h b/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
index f96c30674c..766df9254d 100644
--- a/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
+++ b/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
- * unauthorized copying of this file, via any medium is strictly prohibited.
- * proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Event.h"
diff --git a/cpp/src/scheduler/job/DeleteJob.cpp b/cpp/src/scheduler/job/DeleteJob.cpp
new file mode 100644
index 0000000000..9066afafaa
--- /dev/null
+++ b/cpp/src/scheduler/job/DeleteJob.cpp
@@ -0,0 +1,51 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include "DeleteJob.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace scheduler {
+
+DeleteJob::DeleteJob(JobId id,
+                     std::string table_id,
+                     engine::meta::MetaPtr meta_ptr,
+                     uint64_t num_resource)
+    : Job(id, JobType::DELETE),
+      table_id_(std::move(table_id)),
+      meta_ptr_(std::move(meta_ptr)),
+      num_resource_(num_resource) {}
+
+void DeleteJob::WaitAndDelete() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    cv_.wait(lock, [&] { return done_resource == num_resource_; });
+    meta_ptr_->DeleteTableFiles(table_id_);
+}
+
+void DeleteJob::ResourceDone() {
+    {
+        std::lock_guard<std::mutex> lock(mutex_);
+        ++done_resource;
+    }
+    cv_.notify_one();
+}
+
+}
+}
+}
+
diff --git a/cpp/src/scheduler/job/DeleteJob.h b/cpp/src/scheduler/job/DeleteJob.h
new file mode 100644
index 0000000000..7410577563
--- /dev/null
+++ b/cpp/src/scheduler/job/DeleteJob.h
@@ -0,0 +1,77 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include <string>
+#include <vector>
+#include <list>
+#include <queue>
+#include <deque>
+#include <unordered_map>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <memory>
+
+#include "Job.h"
+#include "db/meta/Meta.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace scheduler {
+
+class DeleteJob : public Job {
+public:
+    DeleteJob(JobId id,
+              std::string table_id,
+              engine::meta::MetaPtr meta_ptr,
+              uint64_t num_resource);
+
+public:
+    void
+    WaitAndDelete();
+
+    void
+    ResourceDone();
+
+public:
+    std::string
+    table_id() const {
+        return table_id_;
+    }
+
+    engine::meta::MetaPtr
+    meta() const {
+        return meta_ptr_;
+    }
+
+private:
+    std::string table_id_;
+    engine::meta::MetaPtr meta_ptr_;
+
+    uint64_t num_resource_ = 0;
+    uint64_t done_resource = 0;
+    std::mutex mutex_;
+    std::condition_variable cv_;
+};
+
+using DeleteJobPtr = std::shared_ptr<DeleteJob>;
+
+}
+}
+}
+
diff --git a/cpp/src/scheduler/job/Job.h b/cpp/src/scheduler/job/Job.h
new file mode 100644
index 0000000000..e79dd51e71
--- /dev/null
+++ b/cpp/src/scheduler/job/Job.h
@@ -0,0 +1,68 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include <string>
+#include <vector>
+#include <list>
+#include <queue>
+#include <deque>
+#include <unordered_map>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <memory>
+
+
+namespace zilliz {
+namespace milvus {
+namespace scheduler {
+
+enum class JobType {
+    INVALID,
+    SEARCH,
+    DELETE,
+    BUILD,
+};
+
+using JobId = std::uint64_t;
+
+class Job {
+public:
+    inline JobId
+    id() const {
+        return id_;
+    }
+
+    inline JobType
+    type() const {
+        return type_;
+    }
+
+protected:
+    Job(JobId id, JobType type) : id_(id), type_(type) {}
+
+private:
+    JobId id_;
+    JobType type_;
+};
+
+using JobPtr = std::shared_ptr<Job>;
+
+}
+}
+}
+
diff --git a/cpp/src/scheduler/job/SearchJob.cpp b/cpp/src/scheduler/job/SearchJob.cpp
new file mode 100644
index 0000000000..786c1fb7b5
--- /dev/null
+++ b/cpp/src/scheduler/job/SearchJob.cpp
@@ -0,0 +1,72 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include "utils/Log.h"
+
+#include "SearchJob.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace scheduler {
+
+SearchJob::SearchJob(zilliz::milvus::scheduler::JobId id,
+                     uint64_t topk,
+                     uint64_t nq,
+                     uint64_t nprobe,
+                     const float *vectors) : Job(id, JobType::SEARCH) {}
+
+bool
+SearchJob::AddIndexFile(const TableFileSchemaPtr &index_file) {
+    std::unique_lock<std::mutex> lock(mutex_);
+    if (index_file == nullptr || index_files_.find(index_file->id_) != index_files_.end()) {
+        return false;
+    }
+
+    SERVER_LOG_DEBUG << "SearchJob " << id() << " add index file: " << index_file->id_;
+
+    index_files_[index_file->id_] = index_file;
+    return true;
+}
+
+
+void
+SearchJob::WaitResult() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    cv_.wait(lock, [this] { return index_files_.empty(); });
+    SERVER_LOG_DEBUG << "SearchJob " << id() << " all done";
+}
+
+void
+SearchJob::SearchDone(size_t index_id) {
+    std::unique_lock<std::mutex> lock(mutex_);
+    index_files_.erase(index_id);
+    cv_.notify_all();
+    SERVER_LOG_DEBUG << "SearchJob " << id() << " finish index file: " << index_id;
+}
+
+ResultSet &
+SearchJob::GetResult() {
+    return result_;
+}
+
+
+}
+}
+}
+
+
diff --git a/cpp/src/scheduler/job/SearchJob.h b/cpp/src/scheduler/job/SearchJob.h
new file mode 100644
index 0000000000..4530c6485b
--- /dev/null
+++ b/cpp/src/scheduler/job/SearchJob.h
@@ -0,0 +1,101 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include <string>
+#include <vector>
+#include <list>
+#include <queue>
+#include <deque>
+#include <unordered_map>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <memory>
+
+#include "Job.h"
+#include "db/meta/MetaTypes.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace scheduler {
+
+
+using engine::meta::TableFileSchemaPtr;
+
+using Id2IndexMap = std::unordered_map<size_t, TableFileSchemaPtr>;
+using Id2DistanceMap = std::vector<std::pair<int64_t, double>>;
+using ResultSet = std::vector<Id2DistanceMap>;
+
+class SearchJob : public Job {
+public:
+    SearchJob(JobId id, uint64_t topk, uint64_t nq, uint64_t nprobe, const float *vectors);
+
+public:
+    bool
+    AddIndexFile(const TableFileSchemaPtr &index_file);
+
+    void
+    WaitResult();
+
+    void
+    SearchDone(size_t index_id);
+
+    ResultSet &
+    GetResult();
+
+public:
+    uint64_t
+    topk() const {
+        return topk_;
+    }
+
+    uint64_t
+    nq() const {
+        return nq_;
+    }
+
+    uint64_t
+    nprobe() const {
+        return nprobe_;
+    }
+    const float *
+    vectors() const {
+        return vectors_;
+    }
+
+private:
+    uint64_t topk_ = 0;
+    uint64_t nq_ = 0;
+    uint64_t nprobe_ = 0;
+    // TODO: smart pointer
+    const float *vectors_ = nullptr;
+
+    Id2IndexMap index_files_;
+    // TODO: column-base better ?
+    ResultSet result_;
+
+    std::mutex mutex_;
+    std::condition_variable cv_;
+};
+
+using SearchJobPtr = std::shared_ptr<SearchJob>;
+
+}
+}
+}
+
diff --git a/cpp/src/scheduler/resource/Connection.h b/cpp/src/scheduler/resource/Connection.h
index 922cf2b437..ae7bf88e86 100644
--- a/cpp/src/scheduler/resource/Connection.h
+++ b/cpp/src/scheduler/resource/Connection.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/scheduler/resource/CpuResource.cpp b/cpp/src/scheduler/resource/CpuResource.cpp
index 9428e1816b..863a427096 100644
--- a/cpp/src/scheduler/resource/CpuResource.cpp
+++ b/cpp/src/scheduler/resource/CpuResource.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "CpuResource.h"
 
diff --git a/cpp/src/scheduler/resource/CpuResource.h b/cpp/src/scheduler/resource/CpuResource.h
index 01822f8d9f..19bac6090d 100644
--- a/cpp/src/scheduler/resource/CpuResource.h
+++ b/cpp/src/scheduler/resource/CpuResource.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/scheduler/resource/DiskResource.cpp b/cpp/src/scheduler/resource/DiskResource.cpp
index 943e1e5efb..bb07f96b96 100644
--- a/cpp/src/scheduler/resource/DiskResource.cpp
+++ b/cpp/src/scheduler/resource/DiskResource.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "DiskResource.h"
 
 
diff --git a/cpp/src/scheduler/resource/DiskResource.h b/cpp/src/scheduler/resource/DiskResource.h
index 8c70404e83..8c8a6ae46a 100644
--- a/cpp/src/scheduler/resource/DiskResource.h
+++ b/cpp/src/scheduler/resource/DiskResource.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 
diff --git a/cpp/src/scheduler/resource/GpuResource.cpp b/cpp/src/scheduler/resource/GpuResource.cpp
index 38f1d624a6..c8959cf393 100644
--- a/cpp/src/scheduler/resource/GpuResource.cpp
+++ b/cpp/src/scheduler/resource/GpuResource.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "GpuResource.h"
 
diff --git a/cpp/src/scheduler/resource/GpuResource.h b/cpp/src/scheduler/resource/GpuResource.h
index 5ef47a127d..12947a35fa 100644
--- a/cpp/src/scheduler/resource/GpuResource.h
+++ b/cpp/src/scheduler/resource/GpuResource.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 
diff --git a/cpp/src/scheduler/resource/Node.cpp b/cpp/src/scheduler/resource/Node.cpp
index 0b322abb57..d4c42a5a97 100644
--- a/cpp/src/scheduler/resource/Node.cpp
+++ b/cpp/src/scheduler/resource/Node.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <atomic>
 #include "Node.h"
diff --git a/cpp/src/scheduler/resource/Node.h b/cpp/src/scheduler/resource/Node.h
index 568aaf93e7..311ec8156a 100644
--- a/cpp/src/scheduler/resource/Node.h
+++ b/cpp/src/scheduler/resource/Node.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <vector>
diff --git a/cpp/src/scheduler/resource/Resource.cpp b/cpp/src/scheduler/resource/Resource.cpp
index 9bb9b57209..b094bb1c06 100644
--- a/cpp/src/scheduler/resource/Resource.cpp
+++ b/cpp/src/scheduler/resource/Resource.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <iostream>
 #include "../Utils.h"
 #include "Resource.h"
diff --git a/cpp/src/scheduler/resource/Resource.h b/cpp/src/scheduler/resource/Resource.h
index a47bef83b1..f49ea71b5c 100644
--- a/cpp/src/scheduler/resource/Resource.h
+++ b/cpp/src/scheduler/resource/Resource.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/scheduler/resource/TestResource.cpp b/cpp/src/scheduler/resource/TestResource.cpp
index 8c35481695..ebdcb403bd 100644
--- a/cpp/src/scheduler/resource/TestResource.cpp
+++ b/cpp/src/scheduler/resource/TestResource.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "TestResource.h"
 
 
diff --git a/cpp/src/scheduler/resource/TestResource.h b/cpp/src/scheduler/resource/TestResource.h
index 0468b2fa12..b8f749ba58 100644
--- a/cpp/src/scheduler/resource/TestResource.h
+++ b/cpp/src/scheduler/resource/TestResource.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 
diff --git a/cpp/src/scheduler/task/DeleteTask.cpp b/cpp/src/scheduler/task/DeleteTask.cpp
index 69b5ed7f05..ded1ad0462 100644
--- a/cpp/src/scheduler/task/DeleteTask.cpp
+++ b/cpp/src/scheduler/task/DeleteTask.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "DeleteTask.h"
 
diff --git a/cpp/src/scheduler/task/DeleteTask.h b/cpp/src/scheduler/task/DeleteTask.h
index 4f9909081f..b49107cc2a 100644
--- a/cpp/src/scheduler/task/DeleteTask.h
+++ b/cpp/src/scheduler/task/DeleteTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <src/db/scheduler/context/DeleteContext.h>
diff --git a/cpp/src/scheduler/task/Path.h b/cpp/src/scheduler/task/Path.h
index 388a7b9c82..64df58b46c 100644
--- a/cpp/src/scheduler/task/Path.h
+++ b/cpp/src/scheduler/task/Path.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <vector>
diff --git a/cpp/src/scheduler/task/SearchTask.cpp b/cpp/src/scheduler/task/SearchTask.cpp
index 46d429ab56..d8222da39f 100644
--- a/cpp/src/scheduler/task/SearchTask.cpp
+++ b/cpp/src/scheduler/task/SearchTask.cpp
@@ -1,14 +1,25 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
-#include "src/metrics/Metrics.h"
-#include "src/utils/TimeRecorder.h"
-#include "src/db/engine/EngineFactory.h"
-#include "src/db/Log.h"
 #include "SearchTask.h"
+#include "metrics/Metrics.h"
+#include "db/engine/EngineFactory.h"
+#include "utils/TimeRecorder.h"
+#include "utils/Log.h"
 
 #include <thread>
 
@@ -97,7 +108,7 @@ XSearchTask::XSearchTask(TableFileSchemaPtr file)
 
 void
 XSearchTask::Load(LoadType type, uint8_t device_id) {
-    server::TimeRecorder rc("");
+    TimeRecorder rc("");
     Status stat = Status::OK();
     std::string error_msg;
     std::string type_str;
@@ -166,7 +177,7 @@ XSearchTask::Execute() {
     ENGINE_LOG_DEBUG << "Searching in file id:" << index_id_ << " with "
                      << search_contexts_.size() << " tasks";
 
-    server::TimeRecorder rc("DoSearch file id:" + std::to_string(index_id_));
+    TimeRecorder rc("DoSearch file id:" + std::to_string(index_id_));
 
     server::CollectDurationMetrics metrics(index_type_);
 
diff --git a/cpp/src/scheduler/task/SearchTask.h b/cpp/src/scheduler/task/SearchTask.h
index 6adda7c1fb..b92e5bd851 100644
--- a/cpp/src/scheduler/task/SearchTask.h
+++ b/cpp/src/scheduler/task/SearchTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Task.h"
diff --git a/cpp/src/scheduler/task/Task.h b/cpp/src/scheduler/task/Task.h
index 0523edfaa0..bfaa1fe68d 100644
--- a/cpp/src/scheduler/task/Task.h
+++ b/cpp/src/scheduler/task/Task.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "db/scheduler/context/SearchContext.h"
diff --git a/cpp/src/scheduler/task/TaskConvert.cpp b/cpp/src/scheduler/task/TaskConvert.cpp
index e55f84f51f..6be6309093 100644
--- a/cpp/src/scheduler/task/TaskConvert.cpp
+++ b/cpp/src/scheduler/task/TaskConvert.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "TaskConvert.h"
 #include "scheduler/tasklabel/DefaultLabel.h"
diff --git a/cpp/src/scheduler/task/TaskConvert.h b/cpp/src/scheduler/task/TaskConvert.h
index bfc2df760b..2420c48b23 100644
--- a/cpp/src/scheduler/task/TaskConvert.h
+++ b/cpp/src/scheduler/task/TaskConvert.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "db/scheduler/task/DeleteTask.h"
 #include "db/scheduler/task/IndexLoadTask.h"
diff --git a/cpp/src/scheduler/task/TestTask.cpp b/cpp/src/scheduler/task/TestTask.cpp
index 1078da583f..f1f9c29477 100644
--- a/cpp/src/scheduler/task/TestTask.cpp
+++ b/cpp/src/scheduler/task/TestTask.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <src/cache/GpuCacheMgr.h>
 #include "TestTask.h"
diff --git a/cpp/src/scheduler/task/TestTask.h b/cpp/src/scheduler/task/TestTask.h
index 6e969e9084..66fd864e1d 100644
--- a/cpp/src/scheduler/task/TestTask.h
+++ b/cpp/src/scheduler/task/TestTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "SearchTask.h"
diff --git a/cpp/src/scheduler/tasklabel/BroadcastLabel.h b/cpp/src/scheduler/tasklabel/BroadcastLabel.h
index 406add5122..2faa49acd1 100644
--- a/cpp/src/scheduler/tasklabel/BroadcastLabel.h
+++ b/cpp/src/scheduler/tasklabel/BroadcastLabel.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "TaskLabel.h"
diff --git a/cpp/src/scheduler/tasklabel/DefaultLabel.h b/cpp/src/scheduler/tasklabel/DefaultLabel.h
index ada34cd679..d1619684b9 100644
--- a/cpp/src/scheduler/tasklabel/DefaultLabel.h
+++ b/cpp/src/scheduler/tasklabel/DefaultLabel.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "TaskLabel.h"
diff --git a/cpp/src/scheduler/tasklabel/SpecResLabel.h b/cpp/src/scheduler/tasklabel/SpecResLabel.h
index 51468bf28b..3955625412 100644
--- a/cpp/src/scheduler/tasklabel/SpecResLabel.h
+++ b/cpp/src/scheduler/tasklabel/SpecResLabel.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "TaskLabel.h"
diff --git a/cpp/src/scheduler/tasklabel/TaskLabel.h b/cpp/src/scheduler/tasklabel/TaskLabel.h
index 5160248768..da8049ebf9 100644
--- a/cpp/src/scheduler/tasklabel/TaskLabel.h
+++ b/cpp/src/scheduler/tasklabel/TaskLabel.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <memory>
diff --git a/cpp/src/sdk/CMakeLists.txt b/cpp/src/sdk/CMakeLists.txt
index 150a1fdf16..6c3a68b8b8 100644
--- a/cpp/src/sdk/CMakeLists.txt
+++ b/cpp/src/sdk/CMakeLists.txt
@@ -1,9 +1,23 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 aux_source_directory(interface interface_files)
 
 aux_source_directory(util util_files)
diff --git a/cpp/src/sdk/examples/CMakeLists.txt b/cpp/src/sdk/examples/CMakeLists.txt
index 9e0437f157..aa15190178 100644
--- a/cpp/src/sdk/examples/CMakeLists.txt
+++ b/cpp/src/sdk/examples/CMakeLists.txt
@@ -1,7 +1,21 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 add_subdirectory(grpcsimple)
diff --git a/cpp/src/sdk/examples/grpcsimple/CMakeLists.txt b/cpp/src/sdk/examples/grpcsimple/CMakeLists.txt
index 36f6364780..b6c67061be 100644
--- a/cpp/src/sdk/examples/grpcsimple/CMakeLists.txt
+++ b/cpp/src/sdk/examples/grpcsimple/CMakeLists.txt
@@ -1,9 +1,23 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
 
+
 aux_source_directory(src src_files)
 
 include_directories(src)
diff --git a/cpp/src/sdk/examples/grpcsimple/main.cpp b/cpp/src/sdk/examples/grpcsimple/main.cpp
index 499b8a9935..4de060590c 100644
--- a/cpp/src/sdk/examples/grpcsimple/main.cpp
+++ b/cpp/src/sdk/examples/grpcsimple/main.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <getopt.h>
 #include <libgen.h>
diff --git a/cpp/src/sdk/examples/grpcsimple/src/ClientTest.cpp b/cpp/src/sdk/examples/grpcsimple/src/ClientTest.cpp
index 2a5b767137..abfc92cc0b 100644
--- a/cpp/src/sdk/examples/grpcsimple/src/ClientTest.cpp
+++ b/cpp/src/sdk/examples/grpcsimple/src/ClientTest.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ClientTest.h"
 #include "MilvusApi.h"
 #include "cache/CpuCacheMgr.h"
diff --git a/cpp/src/sdk/examples/grpcsimple/src/ClientTest.h b/cpp/src/sdk/examples/grpcsimple/src/ClientTest.h
index 0f42577ad1..d95897927e 100644
--- a/cpp/src/sdk/examples/grpcsimple/src/ClientTest.h
+++ b/cpp/src/sdk/examples/grpcsimple/src/ClientTest.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/sdk/grpc/ClientProxy.cpp b/cpp/src/sdk/grpc/ClientProxy.cpp
index 2163e78c66..56ba1e2de6 100644
--- a/cpp/src/sdk/grpc/ClientProxy.cpp
+++ b/cpp/src/sdk/grpc/ClientProxy.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ClientProxy.h"
 #include "version.h"
 #include "milvus.grpc.pb.h"
diff --git a/cpp/src/sdk/grpc/ClientProxy.h b/cpp/src/sdk/grpc/ClientProxy.h
index 300d316c36..c3f79d7209 100644
--- a/cpp/src/sdk/grpc/ClientProxy.h
+++ b/cpp/src/sdk/grpc/ClientProxy.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "MilvusApi.h"
diff --git a/cpp/src/sdk/grpc/GrpcClient.cpp b/cpp/src/sdk/grpc/GrpcClient.cpp
index 4e0283318a..146a96ec29 100644
--- a/cpp/src/sdk/grpc/GrpcClient.cpp
+++ b/cpp/src/sdk/grpc/GrpcClient.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <grpc/grpc.h>
 #include <grpcpp/channel.h>
 #include <grpcpp/client_context.h>
diff --git a/cpp/src/sdk/grpc/GrpcClient.h b/cpp/src/sdk/grpc/GrpcClient.h
index fb64fdb50c..ba9ba05f19 100644
--- a/cpp/src/sdk/grpc/GrpcClient.h
+++ b/cpp/src/sdk/grpc/GrpcClient.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 #include <chrono>
 #include <iostream>
diff --git a/cpp/src/sdk/include/MilvusApi.h b/cpp/src/sdk/include/MilvusApi.h
index 01147d36fb..05de495fbc 100644
--- a/cpp/src/sdk/include/MilvusApi.h
+++ b/cpp/src/sdk/include/MilvusApi.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "Status.h"
diff --git a/cpp/src/sdk/include/Status.h b/cpp/src/sdk/include/Status.h
index 7804f681f5..6dbc762c0a 100644
--- a/cpp/src/sdk/include/Status.h
+++ b/cpp/src/sdk/include/Status.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/sdk/interface/ConnectionImpl.cpp b/cpp/src/sdk/interface/ConnectionImpl.cpp
index 6fb955594d..3730cfd191 100644
--- a/cpp/src/sdk/interface/ConnectionImpl.cpp
+++ b/cpp/src/sdk/interface/ConnectionImpl.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ConnectionImpl.h"
 
 namespace milvus {
diff --git a/cpp/src/sdk/interface/ConnectionImpl.h b/cpp/src/sdk/interface/ConnectionImpl.h
index c8e834b008..6a402fcb0d 100644
--- a/cpp/src/sdk/interface/ConnectionImpl.h
+++ b/cpp/src/sdk/interface/ConnectionImpl.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "MilvusApi.h"
diff --git a/cpp/src/sdk/interface/Status.cpp b/cpp/src/sdk/interface/Status.cpp
index 14c43ce084..344d86c12f 100644
--- a/cpp/src/sdk/interface/Status.cpp
+++ b/cpp/src/sdk/interface/Status.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "Status.h"
 
 namespace milvus {
diff --git a/cpp/src/sdk/util/Exception.h b/cpp/src/sdk/util/Exception.h
index 0ad08305f8..f55b8f0632 100644
--- a/cpp/src/sdk/util/Exception.h
+++ b/cpp/src/sdk/util/Exception.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "Status.h"
diff --git a/cpp/src/server/DBWrapper.cpp b/cpp/src/server/DBWrapper.cpp
index 25f57419b8..d4a145ff37 100644
--- a/cpp/src/server/DBWrapper.cpp
+++ b/cpp/src/server/DBWrapper.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "DBWrapper.h"
 #include "ServerConfig.h"
diff --git a/cpp/src/server/DBWrapper.h b/cpp/src/server/DBWrapper.h
index b47b18b1f7..a321e3cdae 100644
--- a/cpp/src/server/DBWrapper.h
+++ b/cpp/src/server/DBWrapper.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/server/Server.cpp b/cpp/src/server/Server.cpp
index b9e6494eb8..f64ec009b9 100644
--- a/cpp/src/server/Server.cpp
+++ b/cpp/src/server/Server.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <thread>
 #include "Server.h"
 #include "server/grpc_impl/GrpcMilvusServer.h"
diff --git a/cpp/src/server/Server.h b/cpp/src/server/Server.h
index c5ea076fb9..f66c8a314b 100644
--- a/cpp/src/server/Server.h
+++ b/cpp/src/server/Server.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/server/ServerConfig.cpp b/cpp/src/server/ServerConfig.cpp
index 13217e9377..988ee707b6 100644
--- a/cpp/src/server/ServerConfig.cpp
+++ b/cpp/src/server/ServerConfig.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "ServerConfig.h"
 
 #include <sys/stat.h>
diff --git a/cpp/src/server/ServerConfig.h b/cpp/src/server/ServerConfig.h
index a8d906f710..d1f414b47b 100644
--- a/cpp/src/server/ServerConfig.h
+++ b/cpp/src/server/ServerConfig.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/Error.h"
diff --git a/cpp/src/server/grpc_impl/GrpcMilvusServer.cpp b/cpp/src/server/grpc_impl/GrpcMilvusServer.cpp
index 3b0927b438..7b17cd6e56 100644
--- a/cpp/src/server/grpc_impl/GrpcMilvusServer.cpp
+++ b/cpp/src/server/grpc_impl/GrpcMilvusServer.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "milvus.grpc.pb.h"
 #include "GrpcMilvusServer.h"
 #include "../ServerConfig.h"
diff --git a/cpp/src/server/grpc_impl/GrpcMilvusServer.h b/cpp/src/server/grpc_impl/GrpcMilvusServer.h
index fe62563bdf..2ddc5ee2fb 100644
--- a/cpp/src/server/grpc_impl/GrpcMilvusServer.h
+++ b/cpp/src/server/grpc_impl/GrpcMilvusServer.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <cstdint>
diff --git a/cpp/src/server/grpc_impl/GrpcRequestHandler.cpp b/cpp/src/server/grpc_impl/GrpcRequestHandler.cpp
index b1ee3ad073..4fe86c3d1d 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestHandler.cpp
+++ b/cpp/src/server/grpc_impl/GrpcRequestHandler.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "GrpcRequestHandler.h"
 #include "GrpcRequestTask.h"
diff --git a/cpp/src/server/grpc_impl/GrpcRequestHandler.h b/cpp/src/server/grpc_impl/GrpcRequestHandler.h
index 40537c5e67..b855cdebcb 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestHandler.h
+++ b/cpp/src/server/grpc_impl/GrpcRequestHandler.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <cstdint>
diff --git a/cpp/src/server/grpc_impl/GrpcRequestScheduler.cpp b/cpp/src/server/grpc_impl/GrpcRequestScheduler.cpp
index 9f6fe4d409..81ef8d81ad 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestScheduler.cpp
+++ b/cpp/src/server/grpc_impl/GrpcRequestScheduler.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "GrpcRequestScheduler.h"
 #include "utils/Log.h"
 
diff --git a/cpp/src/server/grpc_impl/GrpcRequestScheduler.h b/cpp/src/server/grpc_impl/GrpcRequestScheduler.h
index b873904cec..f8f287b1e6 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestScheduler.h
+++ b/cpp/src/server/grpc_impl/GrpcRequestScheduler.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "utils/BlockingQueue.h"
diff --git a/cpp/src/server/grpc_impl/GrpcRequestTask.cpp b/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
index 9800b3e754..8c7697e1dc 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
+++ b/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "GrpcRequestTask.h"
 #include "../ServerConfig.h"
 #include "utils/CommonUtil.h"
diff --git a/cpp/src/server/grpc_impl/GrpcRequestTask.h b/cpp/src/server/grpc_impl/GrpcRequestTask.h
index ab43bdef70..42a1048124 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestTask.h
+++ b/cpp/src/server/grpc_impl/GrpcRequestTask.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
-* Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-* Unauthorized copying of this file, via any medium is strictly prohibited.
-* Proprietary and confidential.
-******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 #include "GrpcRequestScheduler.h"
 #include "utils/Error.h"
diff --git a/cpp/src/storage/IStorage.h b/cpp/src/storage/IStorage.h
index 918834b106..431dd45caf 100644
--- a/cpp/src/storage/IStorage.h
+++ b/cpp/src/storage/IStorage.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/Status.h"
diff --git a/cpp/src/storage/s3/S3ClientWrapper.cpp b/cpp/src/storage/s3/S3ClientWrapper.cpp
index b739bc1e28..2dca5b3eca 100644
--- a/cpp/src/storage/s3/S3ClientWrapper.cpp
+++ b/cpp/src/storage/s3/S3ClientWrapper.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 //#include "S3ClientWrapper.h"
 //
 //#include <aws/s3/model/CreateBucketRequest.h>
diff --git a/cpp/src/storage/s3/S3ClientWrapper.h b/cpp/src/storage/s3/S3ClientWrapper.h
index fc66304a5a..95a940655e 100644
--- a/cpp/src/storage/s3/S3ClientWrapper.h
+++ b/cpp/src/storage/s3/S3ClientWrapper.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 //#pragma once
 //
 //#include "storage/IStorage.h"
diff --git a/cpp/src/utils/BlockingQueue.h b/cpp/src/utils/BlockingQueue.h
index a77afd7f96..6e46ed1bb1 100644
--- a/cpp/src/utils/BlockingQueue.h
+++ b/cpp/src/utils/BlockingQueue.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <assert.h>
diff --git a/cpp/src/utils/BlockingQueue.inl b/cpp/src/utils/BlockingQueue.inl
index 21146cdfbb..8df38dd547 100644
--- a/cpp/src/utils/BlockingQueue.inl
+++ b/cpp/src/utils/BlockingQueue.inl
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 //#include "Log.h"
diff --git a/cpp/src/utils/CommonUtil.cpp b/cpp/src/utils/CommonUtil.cpp
index c8fdb62e15..0f3f7a229e 100644
--- a/cpp/src/utils/CommonUtil.cpp
+++ b/cpp/src/utils/CommonUtil.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "CommonUtil.h"
 #include "utils/Log.h"
 
diff --git a/cpp/src/utils/CommonUtil.h b/cpp/src/utils/CommonUtil.h
index 99122142ad..8c825f70fe 100755
--- a/cpp/src/utils/CommonUtil.h
+++ b/cpp/src/utils/CommonUtil.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/utils/Error.h b/cpp/src/utils/Error.h
index f49e4b36af..d7008115f9 100644
--- a/cpp/src/utils/Error.h
+++ b/cpp/src/utils/Error.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <cstdint>
diff --git a/cpp/src/db/Exception.h b/cpp/src/utils/Exception.h
similarity index 55%
rename from cpp/src/db/Exception.h
rename to cpp/src/utils/Exception.h
index 2474b70283..acb796c61d 100644
--- a/cpp/src/db/Exception.h
+++ b/cpp/src/utils/Exception.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <exception>
@@ -10,7 +22,6 @@
 
 namespace zilliz {
 namespace milvus {
-namespace engine {
 
 class Exception : public std::exception {
 public:
@@ -49,6 +60,5 @@ public:
     OutOfRangeException(const std::string& message) : Exception(message) {};
 };
 
-} // namespace engine
 } // namespace milvus
 } // namespace zilliz
diff --git a/cpp/src/utils/Log.h b/cpp/src/utils/Log.h
index 204d5812b6..5bb28696e2 100644
--- a/cpp/src/utils/Log.h
+++ b/cpp/src/utils/Log.h
@@ -1,17 +1,28 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
-#include "Error.h"
 #include "easylogging++.h"
 
 namespace zilliz {
 namespace milvus {
-namespace server {
 
+/////////////////////////////////////////////////////////////////////////////////////////////////
 #define SERVER_DOMAIN_NAME "[SERVER] "
 #define SERVER_ERROR_TEXT "SERVER Error:"
 
@@ -22,20 +33,27 @@ namespace server {
 #define SERVER_LOG_ERROR LOG(ERROR) << SERVER_DOMAIN_NAME
 #define SERVER_LOG_FATAL LOG(FATAL) << SERVER_DOMAIN_NAME
 
-#define SERVER_ERROR(error)                             \
-    ({                                                  \
-        SERVER_LOG_ERROR << SERVER_ERROR_TEXT << error; \
-        (error);                                        \
-    })
+/////////////////////////////////////////////////////////////////////////////////////////////////
+#define ENGINE_DOMAIN_NAME "[ENGINE] "
+#define ENGINE_ERROR_TEXT "ENGINE Error:"
 
-#define SERVER_CHECK(func)                                  \
-    {                                                       \
-        zilliz::milvus::server::ServerError error = func;  \
-        if (error != zilliz::milvus::server::SERVER_SUCCESS) { \
-            return SERVER_ERROR(error);                     \
-        }                                                   \
-    }                                                       \
+#define ENGINE_LOG_TRACE LOG(TRACE) << ENGINE_DOMAIN_NAME
+#define ENGINE_LOG_DEBUG LOG(DEBUG) << ENGINE_DOMAIN_NAME
+#define ENGINE_LOG_INFO LOG(INFO) << ENGINE_DOMAIN_NAME
+#define ENGINE_LOG_WARNING LOG(WARNING) << ENGINE_DOMAIN_NAME
+#define ENGINE_LOG_ERROR LOG(ERROR) << ENGINE_DOMAIN_NAME
+#define ENGINE_LOG_FATAL LOG(FATAL) << ENGINE_DOMAIN_NAME
 
-} // namespace sql
+/////////////////////////////////////////////////////////////////////////////////////////////////
+#define WRAPPER_DOMAIN_NAME "[WRAPPER] "
+#define WRAPPER_ERROR_TEXT "WRAPPER Error:"
+
+#define WRAPPER_LOG_TRACE LOG(TRACE) << WRAPPER_DOMAIN_NAME
+#define WRAPPER_LOG_DEBUG LOG(DEBUG) << WRAPPER_DOMAIN_NAME
+#define WRAPPER_LOG_INFO LOG(INFO) << WRAPPER_DOMAIN_NAME
+#define WRAPPER_LOG_WARNING LOG(WARNING) << WRAPPER_DOMAIN_NAME
+#define WRAPPER_LOG_ERROR LOG(ERROR) << WRAPPER_DOMAIN_NAME
+#define WRAPPER_LOG_FATAL LOG(FATAL) << WRAPPER_DOMAIN_NAME
+
+} // namespace milvus
 } // namespace zilliz
-} // namespace server
diff --git a/cpp/src/utils/LogUtil.cpp b/cpp/src/utils/LogUtil.cpp
index 35ff862d50..6224c854a5 100644
--- a/cpp/src/utils/LogUtil.cpp
+++ b/cpp/src/utils/LogUtil.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "LogUtil.h"
 #include "server/ServerConfig.h"
 #include "easylogging++.h"
diff --git a/cpp/src/utils/LogUtil.h b/cpp/src/utils/LogUtil.h
index e2cb011ce7..ebeb117aa2 100644
--- a/cpp/src/utils/LogUtil.h
+++ b/cpp/src/utils/LogUtil.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
diff --git a/cpp/src/utils/SignalUtil.cpp b/cpp/src/utils/SignalUtil.cpp
index 2bc62b2364..07c1001044 100644
--- a/cpp/src/utils/SignalUtil.cpp
+++ b/cpp/src/utils/SignalUtil.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "SignalUtil.h"
 #include "src/server/Server.h"
 #include "utils/Log.h"
diff --git a/cpp/src/utils/SignalUtil.h b/cpp/src/utils/SignalUtil.h
index a8fbf54d48..39645cf989 100644
--- a/cpp/src/utils/SignalUtil.h
+++ b/cpp/src/utils/SignalUtil.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 namespace zilliz {
diff --git a/cpp/src/utils/StringHelpFunctions.cpp b/cpp/src/utils/StringHelpFunctions.cpp
index d45f515761..9c4a6d3a3a 100644
--- a/cpp/src/utils/StringHelpFunctions.cpp
+++ b/cpp/src/utils/StringHelpFunctions.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "StringHelpFunctions.h"
 
 namespace zilliz {
diff --git a/cpp/src/utils/StringHelpFunctions.h b/cpp/src/utils/StringHelpFunctions.h
index f9101ab1e2..1fa45322da 100644
--- a/cpp/src/utils/StringHelpFunctions.h
+++ b/cpp/src/utils/StringHelpFunctions.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include "./Error.h"
diff --git a/cpp/src/utils/ThreadPool.h b/cpp/src/utils/ThreadPool.h
index cf7cc56c65..cb8755fa6b 100644
--- a/cpp/src/utils/ThreadPool.h
+++ b/cpp/src/utils/ThreadPool.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <vector>
@@ -20,7 +32,6 @@
 
 namespace zilliz {
 namespace milvus {
-namespace server {
 
 class ThreadPool {
 public:
@@ -114,5 +125,4 @@ inline ThreadPool::~ThreadPool() {
 
 }
 }
-}
 
diff --git a/cpp/src/utils/TimeRecorder.cpp b/cpp/src/utils/TimeRecorder.cpp
index ee33680f54..6e4b5c1ab6 100644
--- a/cpp/src/utils/TimeRecorder.cpp
+++ b/cpp/src/utils/TimeRecorder.cpp
@@ -1,15 +1,26 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "TimeRecorder.h"
 #include "utils/Log.h"
 
 
 namespace zilliz {
 namespace milvus {
-namespace server {
 
 TimeRecorder::TimeRecorder(const std::string &header,
                            int64_t log_level) :
@@ -91,4 +102,3 @@ TimeRecorder::ElapseFromBegin(const std::string &msg) {
 
 }
 }
-}
diff --git a/cpp/src/utils/TimeRecorder.h b/cpp/src/utils/TimeRecorder.h
index 1656e0d77f..c6efbaeb8a 100644
--- a/cpp/src/utils/TimeRecorder.h
+++ b/cpp/src/utils/TimeRecorder.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <string>
@@ -11,7 +23,6 @@
 
 namespace zilliz {
 namespace milvus {
-namespace server {
 
 class TimeRecorder {
     using stdclock = std::chrono::high_resolution_clock;
@@ -40,4 +51,3 @@ private:
 
 }
 }
-}
diff --git a/cpp/src/utils/ValidationUtil.cpp b/cpp/src/utils/ValidationUtil.cpp
index f5196a1840..2572cbd8bd 100644
--- a/cpp/src/utils/ValidationUtil.cpp
+++ b/cpp/src/utils/ValidationUtil.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "db/engine/ExecutionEngine.h"
 #include "ValidationUtil.h"
 #include "Log.h"
diff --git a/cpp/src/utils/ValidationUtil.h b/cpp/src/utils/ValidationUtil.h
index 2817716c10..ed443e9165 100644
--- a/cpp/src/utils/ValidationUtil.h
+++ b/cpp/src/utils/ValidationUtil.h
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #pragma once
 
 #include "db/meta/MetaTypes.h"
diff --git a/cpp/src/wrapper/gpu/Arithmetic.h b/cpp/src/wrapper/gpu/Arithmetic.h
index 1b6d7a98c1..c6ab7a2bc8 100644
--- a/cpp/src/wrapper/gpu/Arithmetic.h
+++ b/cpp/src/wrapper/gpu/Arithmetic.h
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #pragma once
 
 #include <cstdint>
diff --git a/cpp/src/wrapper/gpu/Topk.cu b/cpp/src/wrapper/gpu/Topk.cu
index 0c857ff683..423c8806c4 100644
--- a/cpp/src/wrapper/gpu/Topk.cu
+++ b/cpp/src/wrapper/gpu/Topk.cu
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "faiss/FaissAssert.h"
 #include "faiss/gpu/utils/Limits.cuh"
diff --git a/cpp/src/wrapper/gpu/Topk.h b/cpp/src/wrapper/gpu/Topk.h
index 62d5756b4c..d8dc69fd09 100644
--- a/cpp/src/wrapper/gpu/Topk.h
+++ b/cpp/src/wrapper/gpu/Topk.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/wrapper/knowhere/KnowhereResource.cpp b/cpp/src/wrapper/knowhere/KnowhereResource.cpp
index d5a9c2f6dc..afbeb81816 100644
--- a/cpp/src/wrapper/knowhere/KnowhereResource.cpp
+++ b/cpp/src/wrapper/knowhere/KnowhereResource.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "KnowhereResource.h"
 #include "server/ServerConfig.h"
diff --git a/cpp/src/wrapper/knowhere/KnowhereResource.h b/cpp/src/wrapper/knowhere/KnowhereResource.h
index b7b320d9cc..c14234eaed 100644
--- a/cpp/src/wrapper/knowhere/KnowhereResource.h
+++ b/cpp/src/wrapper/knowhere/KnowhereResource.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/wrapper/knowhere/data_transfer.cpp b/cpp/src/wrapper/knowhere/data_transfer.cpp
index 583a44ee29..ad29e6cd7d 100644
--- a/cpp/src/wrapper/knowhere/data_transfer.cpp
+++ b/cpp/src/wrapper/knowhere/data_transfer.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "data_transfer.h"
 
diff --git a/cpp/src/wrapper/knowhere/data_transfer.h b/cpp/src/wrapper/knowhere/data_transfer.h
index 46de4ff21f..7f41af98db 100644
--- a/cpp/src/wrapper/knowhere/data_transfer.h
+++ b/cpp/src/wrapper/knowhere/data_transfer.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/wrapper/knowhere/vec_impl.cpp b/cpp/src/wrapper/knowhere/vec_impl.cpp
index c012ea60fb..b6c15b72fb 100644
--- a/cpp/src/wrapper/knowhere/vec_impl.cpp
+++ b/cpp/src/wrapper/knowhere/vec_impl.cpp
@@ -1,10 +1,22 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
-#include <src/utils/Log.h>
+
+#include "utils/Log.h"
 #include "knowhere/index/vector_index/idmap.h"
 #include "knowhere/index/vector_index/gpu_ivf.h"
 #include "knowhere/common/exception.h"
@@ -12,7 +24,6 @@
 
 #include "vec_impl.h"
 #include "data_transfer.h"
-#include "wrapper_log.h"
 
 
 namespace zilliz {
diff --git a/cpp/src/wrapper/knowhere/vec_impl.h b/cpp/src/wrapper/knowhere/vec_impl.h
index e98d030a56..b10dc6b711 100644
--- a/cpp/src/wrapper/knowhere/vec_impl.h
+++ b/cpp/src/wrapper/knowhere/vec_impl.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/wrapper/knowhere/vec_index.cpp b/cpp/src/wrapper/knowhere/vec_index.cpp
index 2c368541cc..b1c377d032 100644
--- a/cpp/src/wrapper/knowhere/vec_index.cpp
+++ b/cpp/src/wrapper/knowhere/vec_index.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "knowhere/index/vector_index/ivf.h"
 #include "knowhere/index/vector_index/idmap.h"
 #include "knowhere/index/vector_index/gpu_ivf.h"
@@ -12,7 +24,7 @@
 
 #include "vec_index.h"
 #include "vec_impl.h"
-#include "wrapper_log.h"
+#include "utils/Log.h"
 
 #include <cuda.h>
 
diff --git a/cpp/src/wrapper/knowhere/vec_index.h b/cpp/src/wrapper/knowhere/vec_index.h
index a5cdcabf04..3ffa0eeec8 100644
--- a/cpp/src/wrapper/knowhere/vec_index.h
+++ b/cpp/src/wrapper/knowhere/vec_index.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/src/wrapper/knowhere/wrapper_log.h b/cpp/src/wrapper/knowhere/wrapper_log.h
deleted file mode 100644
index 7cde925292..0000000000
--- a/cpp/src/wrapper/knowhere/wrapper_log.h
+++ /dev/null
@@ -1,28 +0,0 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
-
-#pragma once
-
-#include "utils/easylogging++.h"
-
-namespace zilliz {
-namespace milvus {
-namespace engine {
-
-#define WRAPPER_DOMAIN_NAME "[WRAPPER] "
-#define WRAPPER_ERROR_TEXT "WRAPPER Error:"
-
-#define WRAPPER_LOG_TRACE LOG(TRACE) << WRAPPER_DOMAIN_NAME
-#define WRAPPER_LOG_DEBUG LOG(DEBUG) << WRAPPER_DOMAIN_NAME
-#define WRAPPER_LOG_INFO LOG(INFO) << WRAPPER_DOMAIN_NAME
-#define WRAPPER_LOG_WARNING LOG(WARNING) << WRAPPER_DOMAIN_NAME
-#define WRAPPER_LOG_ERROR LOG(ERROR) << WRAPPER_DOMAIN_NAME
-#define WRAPPER_LOG_FATAL LOG(FATAL) << WRAPPER_DOMAIN_NAME
-
-}
-}
-}
-
diff --git a/cpp/unittest/CMakeLists.txt b/cpp/unittest/CMakeLists.txt
index 69ea8f4ea1..03729071b9 100644
--- a/cpp/unittest/CMakeLists.txt
+++ b/cpp/unittest/CMakeLists.txt
@@ -1,8 +1,22 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
+
 link_directories(
         "${CMAKE_BINARY_DIR}/lib"
 )
diff --git a/cpp/unittest/db/CMakeLists.txt b/cpp/unittest/db/CMakeLists.txt
index 8c203f329f..00b6f64dbf 100644
--- a/cpp/unittest/db/CMakeLists.txt
+++ b/cpp/unittest/db/CMakeLists.txt
@@ -1,8 +1,22 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
+
 aux_source_directory(${MILVUS_ENGINE_SRC}/db db_main_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/engine db_engine_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/insert db_insert_files)
diff --git a/cpp/unittest/db/db_tests.cpp b/cpp/unittest/db/db_tests.cpp
index 05e7ba4def..372dd336d6 100644
--- a/cpp/unittest/db/db_tests.cpp
+++ b/cpp/unittest/db/db_tests.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "utils.h"
 #include "db/DB.h"
 #include "db/DBImpl.h"
diff --git a/cpp/unittest/db/engine_test.cpp b/cpp/unittest/db/engine_test.cpp
index 5cdad9f121..e06e9038c8 100644
--- a/cpp/unittest/db/engine_test.cpp
+++ b/cpp/unittest/db/engine_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <boost/filesystem.hpp>
 #include <vector>
diff --git a/cpp/unittest/db/mem_test.cpp b/cpp/unittest/db/mem_test.cpp
index 2760711df3..73f6d89f5e 100644
--- a/cpp/unittest/db/mem_test.cpp
+++ b/cpp/unittest/db/mem_test.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "gtest/gtest.h"
 
 #include "db/insert/VectorSource.h"
diff --git a/cpp/unittest/db/meta_tests.cpp b/cpp/unittest/db/meta_tests.cpp
index 2f7a8394e5..62271b9a3b 100644
--- a/cpp/unittest/db/meta_tests.cpp
+++ b/cpp/unittest/db/meta_tests.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <thread>
 #include "utils/easylogging++.h"
diff --git a/cpp/unittest/db/misc_test.cpp b/cpp/unittest/db/misc_test.cpp
index d9c2cbf03e..28ec0f2f9c 100644
--- a/cpp/unittest/db/misc_test.cpp
+++ b/cpp/unittest/db/misc_test.cpp
@@ -1,20 +1,31 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
-#include <gtest/gtest.h>
-#include <thread>
-#include "utils/easylogging++.h"
-#include <boost/filesystem.hpp>
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
-#include "db/Exception.h"
 #include "db/Status.h"
 #include "db/Options.h"
 #include "db/meta/SqliteMetaImpl.h"
 #include "db/engine/EngineFactory.h"
 #include "db/Utils.h"
+#include "utils/Exception.h"
+#include "utils/easylogging++.h"
 
+#include <gtest/gtest.h>
+#include <thread>
+#include <boost/filesystem.hpp>
 #include <vector>
 
 using namespace zilliz::milvus;
@@ -27,11 +38,11 @@ namespace {
 }
 
 TEST(DBMiscTest, EXCEPTION_TEST) {
-    engine::Exception ex1("");
+    Exception ex1("");
     std::string what = ex1.what();
     ASSERT_FALSE(what.empty());
 
-    engine::OutOfRangeException ex2;
+    OutOfRangeException ex2;
     what = ex2.what();
     ASSERT_FALSE(what.empty());
 }
diff --git a/cpp/unittest/db/mysql_db_test.cpp b/cpp/unittest/db/mysql_db_test.cpp
index 396377ab4d..35f086b033 100644
--- a/cpp/unittest/db/mysql_db_test.cpp
+++ b/cpp/unittest/db/mysql_db_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "utils.h"
 #include "db/DB.h"
 #include "db/DBImpl.h"
diff --git a/cpp/unittest/db/mysql_meta_test.cpp b/cpp/unittest/db/mysql_meta_test.cpp
index 5d6da9c3fb..ab94c817fe 100644
--- a/cpp/unittest/db/mysql_meta_test.cpp
+++ b/cpp/unittest/db/mysql_meta_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <thread>
 #include "utils/easylogging++.h"
diff --git a/cpp/unittest/db/scheduler_test.cpp b/cpp/unittest/db/scheduler_test.cpp
index fa941cbcb5..e61741a8fb 100644
--- a/cpp/unittest/db/scheduler_test.cpp
+++ b/cpp/unittest/db/scheduler_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <thread>
 #include "utils/easylogging++.h"
diff --git a/cpp/unittest/db/search_test.cpp b/cpp/unittest/db/search_test.cpp
index 2eb3300bc1..93b71ab406 100644
--- a/cpp/unittest/db/search_test.cpp
+++ b/cpp/unittest/db/search_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "db/scheduler/task/SearchTask.h"
 #include "server/ServerConfig.h"
 #include "utils/TimeRecorder.h"
@@ -226,7 +238,7 @@ TEST(DBSearchTest, PARALLEL_CLUSTER_TEST) {
     engine::SearchContext::ResultSet src_result;
 
     auto DoCluster = [&](int64_t nq, int64_t topk) {
-        server::TimeRecorder rc("DoCluster");
+        TimeRecorder rc("DoCluster");
         src_result.clear();
         BuildResult(nq, topk, ascending, target_ids, target_distence);
         rc.RecordSection("build id/dietance map");
@@ -268,7 +280,7 @@ TEST(DBSearchTest, PARALLEL_TOPK_TEST) {
         src_result.clear();
         insufficient_result.clear();
 
-        server::TimeRecorder rc("DoCluster");
+        TimeRecorder rc("DoCluster");
 
         BuildResult(nq, topk, ascending, target_ids, target_distence);
         auto status = engine::XSearchTask::ClusterResult(target_ids, target_distence, nq, topk, src_result);
diff --git a/cpp/unittest/db/utils.cpp b/cpp/unittest/db/utils.cpp
index 47f21d5d7a..4bc9699e05 100644
--- a/cpp/unittest/db/utils.cpp
+++ b/cpp/unittest/db/utils.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <iostream>
 #include <thread>
diff --git a/cpp/unittest/db/utils.h b/cpp/unittest/db/utils.h
index 5d8cca3bd1..c1dc730089 100644
--- a/cpp/unittest/db/utils.h
+++ b/cpp/unittest/db/utils.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/unittest/knowhere/CMakeLists.txt b/cpp/unittest/knowhere/CMakeLists.txt
index 59fff95509..27e2612ae7 100644
--- a/cpp/unittest/knowhere/CMakeLists.txt
+++ b/cpp/unittest/knowhere/CMakeLists.txt
@@ -1,3 +1,22 @@
+#-------------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#-------------------------------------------------------------------------------
+
 include_directories("${CUDA_TOOLKIT_ROOT_DIR}/include")
 link_directories("${CUDA_TOOLKIT_ROOT_DIR}/lib64")
 
diff --git a/cpp/unittest/knowhere/knowhere_test.cpp b/cpp/unittest/knowhere/knowhere_test.cpp
index 6e5f0fc686..6d8f57f322 100644
--- a/cpp/unittest/knowhere/knowhere_test.cpp
+++ b/cpp/unittest/knowhere/knowhere_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 #include "utils/easylogging++.h"
diff --git a/cpp/unittest/knowhere/utils.cpp b/cpp/unittest/knowhere/utils.cpp
index e07bd2cd42..f404f000e9 100644
--- a/cpp/unittest/knowhere/utils.cpp
+++ b/cpp/unittest/knowhere/utils.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <faiss/IndexFlat.h>
 
diff --git a/cpp/unittest/knowhere/utils.h b/cpp/unittest/knowhere/utils.h
index 69653b6470..7a73d84713 100644
--- a/cpp/unittest/knowhere/utils.h
+++ b/cpp/unittest/knowhere/utils.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/unittest/main.cpp b/cpp/unittest/main.cpp
index 086b715aa9..b0c2be6d5a 100644
--- a/cpp/unittest/main.cpp
+++ b/cpp/unittest/main.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <gmock/gmock.h>
 #include "utils/easylogging++.h"
diff --git a/cpp/unittest/metrics/CMakeLists.txt b/cpp/unittest/metrics/CMakeLists.txt
index b3ac068757..07f27e1e67 100644
--- a/cpp/unittest/metrics/CMakeLists.txt
+++ b/cpp/unittest/metrics/CMakeLists.txt
@@ -1,3 +1,22 @@
+#-------------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#-------------------------------------------------------------------------------
+
 include_directories(../../src)
 
 
diff --git a/cpp/unittest/metrics/metricbase_test.cpp b/cpp/unittest/metrics/metricbase_test.cpp
index 10087b370a..31766403be 100644
--- a/cpp/unittest/metrics/metricbase_test.cpp
+++ b/cpp/unittest/metrics/metricbase_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "metrics/Metrics.h"
 
diff --git a/cpp/unittest/metrics/metrics_test.cpp b/cpp/unittest/metrics/metrics_test.cpp
index dc9469a18c..2bd06ed091 100644
--- a/cpp/unittest/metrics/metrics_test.cpp
+++ b/cpp/unittest/metrics/metrics_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <chrono>
 #include <chrono>
 #include <map>
diff --git a/cpp/unittest/metrics/prometheus_test.cpp b/cpp/unittest/metrics/prometheus_test.cpp
index 07aab27f48..b4fa84401a 100644
--- a/cpp/unittest/metrics/prometheus_test.cpp
+++ b/cpp/unittest/metrics/prometheus_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "metrics/PrometheusMetrics.h"
 
diff --git a/cpp/unittest/metrics/utils.cpp b/cpp/unittest/metrics/utils.cpp
index 307572e9e8..4dc370c952 100644
--- a/cpp/unittest/metrics/utils.cpp
+++ b/cpp/unittest/metrics/utils.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <iostream>
 #include <thread>
diff --git a/cpp/unittest/metrics/utils.h b/cpp/unittest/metrics/utils.h
index 73e7310094..ef25654ed0 100644
--- a/cpp/unittest/metrics/utils.h
+++ b/cpp/unittest/metrics/utils.h
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #pragma once
 
diff --git a/cpp/unittest/scheduler/CMakeLists.txt b/cpp/unittest/scheduler/CMakeLists.txt
index f09f8639a1..9ada727f8e 100644
--- a/cpp/unittest/scheduler/CMakeLists.txt
+++ b/cpp/unittest/scheduler/CMakeLists.txt
@@ -1,8 +1,22 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
+
 aux_source_directory(${MILVUS_ENGINE_SRC}/db db_main_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/engine db_engine_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/insert db_insert_files)
diff --git a/cpp/unittest/scheduler/algorithm_test.cpp b/cpp/unittest/scheduler/algorithm_test.cpp
index eeb7fc64f3..5272edf0d7 100644
--- a/cpp/unittest/scheduler/algorithm_test.cpp
+++ b/cpp/unittest/scheduler/algorithm_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include <gtest/gtest.h>
 
diff --git a/cpp/unittest/scheduler/event_test.cpp b/cpp/unittest/scheduler/event_test.cpp
index 0c5ec21037..895aabe19d 100644
--- a/cpp/unittest/scheduler/event_test.cpp
+++ b/cpp/unittest/scheduler/event_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 
 #include <gtest/gtest.h>
diff --git a/cpp/unittest/scheduler/node_test.cpp b/cpp/unittest/scheduler/node_test.cpp
index dfe0398d22..36dd10b73d 100644
--- a/cpp/unittest/scheduler/node_test.cpp
+++ b/cpp/unittest/scheduler/node_test.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "scheduler/resource/Node.h"
 #include <gtest/gtest.h>
 
diff --git a/cpp/unittest/scheduler/normal_test.cpp b/cpp/unittest/scheduler/normal_test.cpp
index 8c096c4df8..5ddfd49b55 100644
--- a/cpp/unittest/scheduler/normal_test.cpp
+++ b/cpp/unittest/scheduler/normal_test.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "scheduler/ResourceFactory.h"
 #include "scheduler/ResourceMgr.h"
 #include "scheduler/Scheduler.h"
diff --git a/cpp/unittest/scheduler/resource_factory_test.cpp b/cpp/unittest/scheduler/resource_factory_test.cpp
index 82b05f6215..1bf39f669f 100644
--- a/cpp/unittest/scheduler/resource_factory_test.cpp
+++ b/cpp/unittest/scheduler/resource_factory_test.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "scheduler/ResourceFactory.h"
 #include <gtest/gtest.h>
 
diff --git a/cpp/unittest/scheduler/resource_mgr_test.cpp b/cpp/unittest/scheduler/resource_mgr_test.cpp
index 180072d87e..56db020058 100644
--- a/cpp/unittest/scheduler/resource_mgr_test.cpp
+++ b/cpp/unittest/scheduler/resource_mgr_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "scheduler/resource/CpuResource.h"
 #include "scheduler/resource/GpuResource.h"
diff --git a/cpp/unittest/scheduler/resource_test.cpp b/cpp/unittest/scheduler/resource_test.cpp
index 0eb2de8e33..b5a83ac776 100644
--- a/cpp/unittest/scheduler/resource_test.cpp
+++ b/cpp/unittest/scheduler/resource_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "scheduler/resource/Resource.h"
 #include "scheduler/resource/DiskResource.h"
diff --git a/cpp/unittest/scheduler/schedinst_test.cpp b/cpp/unittest/scheduler/schedinst_test.cpp
index b824c20022..27b6a17bbb 100644
--- a/cpp/unittest/scheduler/schedinst_test.cpp
+++ b/cpp/unittest/scheduler/schedinst_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "scheduler/SchedInst.h"
 #include "server/ServerConfig.h"
diff --git a/cpp/unittest/scheduler/scheduler_test.cpp b/cpp/unittest/scheduler/scheduler_test.cpp
index 5a1824a185..6f680f4a60 100644
--- a/cpp/unittest/scheduler/scheduler_test.cpp
+++ b/cpp/unittest/scheduler/scheduler_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "scheduler/Scheduler.h"
 #include <gtest/gtest.h>
 #include <src/scheduler/tasklabel/DefaultLabel.h>
diff --git a/cpp/unittest/scheduler/task_test.cpp b/cpp/unittest/scheduler/task_test.cpp
index 04071dc0c9..8a8b455ae5 100644
--- a/cpp/unittest/scheduler/task_test.cpp
+++ b/cpp/unittest/scheduler/task_test.cpp
@@ -1,8 +1,20 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 
 #include "scheduler/task/SearchTask.h"
 #include <gtest/gtest.h>
diff --git a/cpp/unittest/scheduler/tasktable_test.cpp b/cpp/unittest/scheduler/tasktable_test.cpp
index f13ccaecf9..9e1f9b2c3a 100644
--- a/cpp/unittest/scheduler/tasktable_test.cpp
+++ b/cpp/unittest/scheduler/tasktable_test.cpp
@@ -1,3 +1,21 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
 #include "scheduler/TaskTable.h"
 #include "scheduler/task/TestTask.h"
 #include <gtest/gtest.h>
diff --git a/cpp/unittest/server/CMakeLists.txt b/cpp/unittest/server/CMakeLists.txt
index 48e37357b1..6bbe2183ce 100644
--- a/cpp/unittest/server/CMakeLists.txt
+++ b/cpp/unittest/server/CMakeLists.txt
@@ -1,8 +1,22 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
+
 include_directories(${MILVUS_ENGINE_SRC}/)
 include_directories(/usr/include)
 
diff --git a/cpp/unittest/server/appendix/server_config.yaml b/cpp/unittest/server/appendix/server_config.yaml
index 1a3dca9d97..e4b3de31b0 100644
--- a/cpp/unittest/server/appendix/server_config.yaml
+++ b/cpp/unittest/server/appendix/server_config.yaml
@@ -38,44 +38,8 @@ engine_config:
   use_blas_threshold: 20
 
 resource_config:
-  # resource list, length: 0~N
-  # please set a DISK resource and a CPU resource least, or system will not return query result.
-  #
-  # example:
-  # resource_name:               # resource name, just using in connections below
-  #   type: DISK                 # resource type, optional: DISK/CPU/GPU
-  #   device_id: 0
-  #   enable_executor: false     # if is enable executor, optional: true, false
-
+  mode: simple
   resources:
-    ssda:
-      type: DISK
-      device_id: 0
-      enable_executor: false
-
-    cpu:
-      type: CPU
-      device_id: 0
-      enable_executor: false
-
-    gpu0:
-      type: GPU
-      device_id: 0
-      enable_executor: true
-      gpu_resource_num: 2
-      pinned_memory: 300
-      temp_memory: 300
-
-  # connection list, length: 0~N
-  # example:
-  # connection_name:
-  #   speed: 100                                        # unit: MS/s
-  #   endpoint: ===
-  connections:
-    io:
-      speed: 500
-      endpoint: ssda===cpu
-    pcie0:
-      speed: 11000
-      endpoint: cpu===gpu0
+    #    - cpu
+    - gpu0
 
diff --git a/cpp/unittest/server/cache_test.cpp b/cpp/unittest/server/cache_test.cpp
index 501d3f486f..5bb1fb8612 100644
--- a/cpp/unittest/server/cache_test.cpp
+++ b/cpp/unittest/server/cache_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include "cache/CpuCacheMgr.h"
 #include "cache/GpuCacheMgr.h"
@@ -15,21 +27,27 @@ using namespace zilliz::milvus;
 
 namespace {
 
-class InvalidCacheMgr : public cache::CacheMgr {
+class InvalidCacheMgr : public cache::CacheMgr<cache::DataObjPtr> {
 public:
     InvalidCacheMgr() {
     }
 };
 
-class LessItemCacheMgr : public cache::CacheMgr {
+class LessItemCacheMgr : public cache::CacheMgr<cache::DataObjPtr> {
 public:
     LessItemCacheMgr() {
-        cache_ = std::make_shared<cache::Cache>(1UL << 12, 10);
+        cache_ = std::make_shared<cache::Cache<cache::DataObjPtr>>(1UL << 12, 10);
     }
 };
 
 class MockVecIndex : public engine::VecIndex {
 public:
+    MockVecIndex(int64_t dim, int64_t total)
+        : dimension_(dim),
+          ntotal_(total){
+
+    }
+
     virtual ErrorCode BuildAll(const long &nb,
                                const float *xb,
                                const long *ids,
@@ -93,7 +111,7 @@ public:
     }
 
 public:
-    int64_t dimension_ = 512;
+    int64_t dimension_ = 256;
     int64_t ntotal_ = 0;
 };
 
@@ -101,7 +119,7 @@ public:
 
 TEST(CacheTest, DUMMY_TEST) {
     engine::Config cfg;
-    MockVecIndex mock_index;
+    MockVecIndex mock_index(256, 1000);
     mock_index.Dimension();
     mock_index.Count();
     mock_index.Add(1, nullptr, nullptr);
@@ -118,29 +136,27 @@ TEST(CacheTest, DUMMY_TEST) {
 }
 
 TEST(CacheTest, CPU_CACHE_TEST) {
-    cache::CacheMgr *cpu_mgr = cache::CpuCacheMgr::GetInstance();
+    auto cpu_mgr = cache::CpuCacheMgr::GetInstance();
 
-    const int64_t gbyte = 1 << 30;
+    const int64_t gbyte = 1024*1024*1024;
     int64_t g_num = 16;
     int64_t cap = g_num * gbyte;
     cpu_mgr->SetCapacity(cap);
     ASSERT_EQ(cpu_mgr->CacheCapacity(), cap);
 
-    const int dim = 256;
-
-    for (int i = 0; i < 20; i++) {
-        MockVecIndex* mock_index = new MockVecIndex();
-        mock_index->ntotal_ = 1000000;//less 1G per index
-        engine::VecIndexPtr index(mock_index);
-
-        cpu_mgr->InsertItem("index_" + std::to_string(i), index);
+    uint64_t item_count = 20;
+    for (uint64_t i = 0; i < item_count; i++) {
+        //each vector is 1k byte, total size less than 1G
+        engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 1000000);
+        cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
+        cpu_mgr->InsertItem("index_" + std::to_string(i), data_obj);
     }
     ASSERT_LT(cpu_mgr->ItemCount(), g_num);
 
     auto obj = cpu_mgr->GetIndex("index_0");
     ASSERT_TRUE(obj == nullptr);
 
-    obj = cpu_mgr->GetIndex("index_19");
+    obj = cpu_mgr->GetIndex("index_" + std::to_string(item_count - 1));
     ASSERT_TRUE(obj != nullptr);
 
     {
@@ -154,30 +170,24 @@ TEST(CacheTest, CPU_CACHE_TEST) {
         g_num = 5;
         cpu_mgr->SetCapacity(g_num * gbyte);
 
-        MockVecIndex* mock_index = new MockVecIndex();
-        mock_index->ntotal_ = 6000000;//6G less
-        engine::VecIndexPtr index(mock_index);
-
-        cpu_mgr->InsertItem("index_6g", index);
-        ASSERT_EQ(cpu_mgr->ItemCount(), 0);//data greater than capacity can not be inserted sucessfully
+        //each vector is 1k byte, total size less than 6G
+        engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 6000000);
+        cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
+        cpu_mgr->InsertItem("index_6g", data_obj);
+        ASSERT_TRUE(cpu_mgr->ItemExists("index_6g"));
     }
 
     cpu_mgr->PrintInfo();
 }
 
 TEST(CacheTest, GPU_CACHE_TEST) {
-    cache::CacheMgr* gpu_mgr = cache::GpuCacheMgr::GetInstance(0);
-
-    const int dim = 256;
+    auto gpu_mgr = cache::GpuCacheMgr::GetInstance(0);
 
     for(int i = 0; i < 20; i++) {
-        MockVecIndex* mock_index = new MockVecIndex();
-        mock_index->ntotal_ = 1000;
-        engine::VecIndexPtr index(mock_index);
-
-        cache::DataObjPtr obj = std::make_shared<cache::DataObj>(index);
-
-        gpu_mgr->InsertItem("index_" + std::to_string(i), obj);
+        //each vector is 1k byte
+        engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 1000);
+        cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
+        gpu_mgr->InsertItem("index_" + std::to_string(i), data_obj);
     }
 
     auto obj = gpu_mgr->GetItem("index_0");
@@ -187,19 +197,13 @@ TEST(CacheTest, GPU_CACHE_TEST) {
 
     for (auto i = 0; i < 3; i++) {
         // TODO: use gpu index to mock
-        MockVecIndex *mock_index = new MockVecIndex();
-        mock_index->ntotal_ = 1000000;  //2G
-        engine::VecIndexPtr index(mock_index);
-        cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(index);
+        //each vector is 1k byte, total size less than 2G
+        engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 2000000);
+        cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
         std::cout << data_obj->size() <<std::endl;
         gpu_mgr->InsertItem("index_" + std::to_string(i), data_obj);
     }
 
-//    ASSERT_EQ(gpu_mgr->ItemCount(), 2);
-//    auto obj0 = gpu_mgr->GetItem("index_0");
-//    ASSERT_EQ(obj0, nullptr);
-//    auto obj1 = gpu_mgr->GetItem("index_1");
-//    auto obj2 = gpu_mgr->GetItem("index_2");
     gpu_mgr->ClearCache();
     ASSERT_EQ(gpu_mgr->ItemCount(), 0);
 
@@ -213,7 +217,7 @@ TEST(CacheTest, INVALID_TEST) {
         ASSERT_EQ(mgr.GetItem("test"), nullptr);
 
         mgr.InsertItem("test", cache::DataObjPtr());
-        mgr.InsertItem("test", engine::VecIndexPtr(nullptr));
+        mgr.InsertItem("test", nullptr);
         mgr.EraseItem("test");
         mgr.PrintInfo();
         mgr.ClearCache();
@@ -225,12 +229,10 @@ TEST(CacheTest, INVALID_TEST) {
     {
         LessItemCacheMgr mgr;
         for(int i = 0; i < 20; i++) {
-            MockVecIndex* mock_index = new MockVecIndex();
-            mock_index->ntotal_ = 2;
-            engine::VecIndexPtr index(mock_index);
-
-            cache::DataObjPtr obj = std::make_shared<cache::DataObj>(index);
-            mgr.InsertItem("index_" + std::to_string(i), obj);
+            //each vector is 1k byte
+            engine::VecIndexPtr mock_index = std::make_shared<MockVecIndex>(256, 2);
+            cache::DataObjPtr data_obj = std::make_shared<cache::DataObj>(mock_index);
+            mgr.InsertItem("index_" + std::to_string(i), data_obj);
         }
         ASSERT_EQ(mgr.GetItem("index_0"), nullptr);
     }
diff --git a/cpp/unittest/server/config_test.cpp b/cpp/unittest/server/config_test.cpp
index ddfca182f5..d53d674b37 100644
--- a/cpp/unittest/server/config_test.cpp
+++ b/cpp/unittest/server/config_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <gtest/gtest-death-test.h>
 
diff --git a/cpp/unittest/server/rpc_test.cpp b/cpp/unittest/server/rpc_test.cpp
index ea6fc3f94c..09a8a1e461 100644
--- a/cpp/unittest/server/rpc_test.cpp
+++ b/cpp/unittest/server/rpc_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <thread>
 #include <boost/filesystem.hpp>
diff --git a/cpp/unittest/server/util_test.cpp b/cpp/unittest/server/util_test.cpp
index a600ace499..3849f79d19 100644
--- a/cpp/unittest/server/util_test.cpp
+++ b/cpp/unittest/server/util_test.cpp
@@ -1,8 +1,20 @@
-////////////////////////////////////////////////////////////////////////////////
-// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-// Unauthorized copying of this file, via any medium is strictly prohibited.
-// Proprietary and confidential.
-////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include <gtest/gtest.h>
 #include <thread>
 #include "utils/easylogging++.h"
@@ -166,7 +178,7 @@ TEST(UtilTest, TIMERECORDER_TEST) {
         if(log_level == 5) {
             continue; //skip fatal
         }
-        server::TimeRecorder rc("time", log_level);
+        TimeRecorder rc("time", log_level);
         rc.RecordSection("end");
     }
 }
diff --git a/cpp/unittest/storage/CMakeLists.txt b/cpp/unittest/storage/CMakeLists.txt
index 6a8c739431..79819b2deb 100644
--- a/cpp/unittest/storage/CMakeLists.txt
+++ b/cpp/unittest/storage/CMakeLists.txt
@@ -1,8 +1,22 @@
 #-------------------------------------------------------------------------------
-# Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited.
-# Proprietary and confidential.
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
 #-------------------------------------------------------------------------------
+
 aux_source_directory(${MILVUS_ENGINE_SRC}/storage/s3 s3_client_src)
 
 set(util_files
diff --git a/cpp/unittest/storage/S3ClientTest.cpp b/cpp/unittest/storage/S3ClientTest.cpp
index 5147f701ae..540d9ab75e 100644
--- a/cpp/unittest/storage/S3ClientTest.cpp
+++ b/cpp/unittest/storage/S3ClientTest.cpp
@@ -1,8 +1,20 @@
-//////////////////////////////////////////////////////////////////////////////////
-//// Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
-//// Unauthorized copying of this file, via any medium is strictly prohibited.
-//// Proprietary and confidential.
-//////////////////////////////////////////////////////////////////////////////////
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 //
 //#include "storage/IStorage.h"
 //#include "storage/s3/S3ClientWrapper.h"