diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85f1a6f15a..52e05b9b0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ Please mark all change in change log and use the issue from GitHub
 
 ## Task
 
+
 # Milvus 0.9.0 (2020-05-15)
 
 ## Bug
diff --git a/DESIGN.md b/DESIGN.md
index 7584159220..a1d7e2736e 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -8,3 +8,6 @@ The following list contains existing design documents for Milvus.
 -   [Support delete/search by ID, attribute filtering, ID de-duplication](https://docs.google.com/document/d/1CDKdTj_DnE90YaZrPgsMaphqOTkMdbKETNrsFKj_Bco/edit?usp=sharing)
 -   [Support write-ahead logging](https://docs.google.com/document/d/12N8RC_wJb2dvEKY9jrlh8hU_eH8jxQVBewoPuHNqcXE/edit?usp=sharing)
 -   [Support in-service config modification](https://docs.google.com/document/d/1pK1joWJgAHM5nVp3q005iLbLqU5bn9InWeBy0mRAoSg/edit?usp=sharing)
+-   [Support Multi-Storage](https://docs.google.com/document/d/1iwwLH4Jtm3OXIVb7jFYsfmcbOyX6AWZKaNJAaXC7-cw/edit?usp=sharing)
+-   [Support AVX-512](https://docs.google.com/document/d/1do6_JgRCYdcV95sTPE6rLoiBK8wAcZki5Ypp7jbgqK0/edit?usp=sharing)
+-   [Refactor Knowhere](https://docs.google.com/document/d/1HY27EXV4UjJhDEmJ9t4Rjh7I1sB8iJHvqvliM6HHLS8/edit?usp=sharing)
diff --git a/core/src/db/engine/ExecutionEngine.h b/core/src/db/engine/ExecutionEngine.h
index d2c34c0a7e..f5f604f302 100644
--- a/core/src/db/engine/ExecutionEngine.h
+++ b/core/src/db/engine/ExecutionEngine.h
@@ -110,10 +110,10 @@ class ExecutionEngine {
     //    Merge(const std::string& location) = 0;
 
     virtual Status
-    GetVectorByID(const int64_t& id, float* vector, bool hybrid) = 0;
+    GetVectorByID(const int64_t id, float* vector, bool hybrid) = 0;
 
     virtual Status
-    GetVectorByID(const int64_t& id, uint8_t* vector, bool hybrid) = 0;
+    GetVectorByID(const int64_t id, uint8_t* vector, bool hybrid) = 0;
 
     virtual Status
     ExecBinaryQuery(query::GeneralQueryPtr general_query, faiss::ConcurrentBitsetPtr bitset,
diff --git a/core/src/db/engine/ExecutionEngineImpl.cpp b/core/src/db/engine/ExecutionEngineImpl.cpp
index 0543bde26b..634db1cff6 100644
--- a/core/src/db/engine/ExecutionEngineImpl.cpp
+++ b/core/src/db/engine/ExecutionEngineImpl.cpp
@@ -1213,7 +1213,7 @@ ExecutionEngineImpl::Search(int64_t n, const uint8_t* data, int64_t k, const mil
 }
 
 Status
-ExecutionEngineImpl::GetVectorByID(const int64_t& id, float* vector, bool hybrid) {
+ExecutionEngineImpl::GetVectorByID(const int64_t id, float* vector, bool hybrid) {
     if (index_ == nullptr) {
         LOG_ENGINE_ERROR_ << "ExecutionEngineImpl: index is null, failed to search";
         return Status(DB_ERROR, "index is null");
@@ -1238,7 +1238,7 @@ ExecutionEngineImpl::GetVectorByID(const int64_t& id, float* vector, bool hybrid
 }
 
 Status
-ExecutionEngineImpl::GetVectorByID(const int64_t& id, uint8_t* vector, bool hybrid) {
+ExecutionEngineImpl::GetVectorByID(const int64_t id, uint8_t* vector, bool hybrid) {
     if (index_ == nullptr) {
         LOG_ENGINE_ERROR_ << "ExecutionEngineImpl: index is null, failed to search";
         return Status(DB_ERROR, "index is null");
diff --git a/core/src/db/engine/ExecutionEngineImpl.h b/core/src/db/engine/ExecutionEngineImpl.h
index 218f72bc7e..e450e04ee6 100644
--- a/core/src/db/engine/ExecutionEngineImpl.h
+++ b/core/src/db/engine/ExecutionEngineImpl.h
@@ -64,10 +64,10 @@ class ExecutionEngineImpl : public ExecutionEngine {
     CopyToCpu() override;
 
     Status
-    GetVectorByID(const int64_t& id, float* vector, bool hybrid) override;
+    GetVectorByID(const int64_t id, float* vector, bool hybrid) override;
 
     Status
-    GetVectorByID(const int64_t& id, uint8_t* vector, bool hybrid) override;
+    GetVectorByID(const int64_t id, uint8_t* vector, bool hybrid) override;
 
     Status
     ExecBinaryQuery(query::GeneralQueryPtr general_query, faiss::ConcurrentBitsetPtr bitset,
diff --git a/core/src/index/archive/KnowhereResource.cpp b/core/src/index/archive/KnowhereResource.cpp
index 4615aff8af..c822b8ff4f 100644
--- a/core/src/index/archive/KnowhereResource.cpp
+++ b/core/src/index/archive/KnowhereResource.cpp
@@ -70,8 +70,8 @@ KnowhereResource::Initialize() {
         return Status::OK();
 
     struct GpuResourceSetting {
-        int64_t pinned_memory = 300 * M_BYTE;
-        int64_t temp_memory = 300 * M_BYTE;
+        int64_t pinned_memory = 256 * M_BYTE;
+        int64_t temp_memory = 256 * M_BYTE;
         int64_t resource_num = 2;
     };
     using GpuResourcesArray = std::map<int64_t, GpuResourceSetting>;
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/IndexNSG.h b/core/src/index/knowhere/knowhere/index/vector_index/IndexNSG.h
index 3c43447160..03b0adbd05 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/IndexNSG.h
+++ b/core/src/index/knowhere/knowhere/index/vector_index/IndexNSG.h
@@ -27,7 +27,7 @@ class NsgIndex;
 
 class NSG : public VecIndex {
  public:
-    explicit NSG(const int64_t& gpu_num = -1) : gpu_(gpu_num) {
+    explicit NSG(const int64_t gpu_num = -1) : gpu_(gpu_num) {
         if (gpu_ >= 0) {
             index_mode_ = IndexMode::MODE_GPU;
         }
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexGPUIDMAP.h b/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexGPUIDMAP.h
index af3462fbb0..b035cb1407 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexGPUIDMAP.h
+++ b/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexGPUIDMAP.h
@@ -25,7 +25,7 @@ using Graph = std::vector<std::vector<int64_t>>;
 
 class GPUIDMAP : public IDMAP, public GPUIndex {
  public:
-    explicit GPUIDMAP(std::shared_ptr<faiss::Index> index, const int64_t& device_id, ResPtr& res)
+    explicit GPUIDMAP(std::shared_ptr<faiss::Index> index, const int64_t device_id, ResPtr& res)
         : IDMAP(std::move(index)), GPUIndex(device_id, res) {
         index_mode_ = IndexMode::MODE_GPU;
     }
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexIVFSQHybrid.h b/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexIVFSQHybrid.h
index 578ecd0d9f..9d09261806 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexIVFSQHybrid.h
+++ b/core/src/index/knowhere/knowhere/index/vector_index/gpu/IndexIVFSQHybrid.h
@@ -46,7 +46,7 @@ class IVFSQHybrid : public GPUIVFSQ {
         gpu_mode_ = 0;
     }
 
-    explicit IVFSQHybrid(std::shared_ptr<faiss::Index> index, const int64_t& device_id, ResPtr& resource)
+    explicit IVFSQHybrid(std::shared_ptr<faiss::Index> index, const int64_t device_id, ResPtr& resource)
         : GPUIVFSQ(index, device_id, resource) {
         index_type_ = IndexEnum::INDEX_FAISS_IVFSQ8H;
         gpu_mode_ = 2;
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.cpp b/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.cpp
index 10b047d53d..5a37efe4b2 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.cpp
+++ b/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.cpp
@@ -18,6 +18,8 @@
 namespace milvus {
 namespace knowhere {
 
+constexpr int64_t MB = 1LL << 20;
+
 FaissGpuResourceMgr&
 FaissGpuResourceMgr::GetInstance() {
     static FaissGpuResourceMgr instance;
@@ -45,8 +47,8 @@ FaissGpuResourceMgr::InitDevice(int64_t device_id, int64_t pin_mem_size, int64_t
     params.resource_num = res_num;
 
     devices_params_.emplace(device_id, params);
-    LOG_KNOWHERE_DEBUG_ << "DEVICEID " << device_id << ", pin_mem_size " << pin_mem_size << ", temp_mem_size "
-                        << temp_mem_size << ", resource count " << res_num;
+    LOG_KNOWHERE_DEBUG_ << "DEVICEID " << device_id << ", pin_mem_size " << pin_mem_size / MB << "MB, temp_mem_size "
+                        << temp_mem_size / MB << "MB, resource count " << res_num;
 }
 
 void
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.h b/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.h
index 5c3ee2aa83..9b86ac57a5 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.h
+++ b/core/src/index/knowhere/knowhere/index/vector_index/helpers/FaissGpuResourceMgr.h
@@ -87,19 +87,19 @@ class FaissGpuResourceMgr {
 
 class ResScope {
  public:
-    ResScope(ResPtr& res, const int64_t& device_id, const bool& isown)
+    ResScope(ResPtr& res, const int64_t device_id, const bool isown)
         : resource(res), device_id(device_id), move(true), own(isown) {
         Lock();
     }
 
-    ResScope(ResWPtr& res, const int64_t& device_id, const bool& isown)
+    ResScope(ResWPtr& res, const int64_t device_id, const bool isown)
         : resource(res), device_id(device_id), move(true), own(isown) {
         Lock();
     }
 
     // specif for search
     // get the ownership of gpuresource and gpu
-    ResScope(ResWPtr& res, const int64_t& device_id) : device_id(device_id), move(false), own(true) {
+    ResScope(ResWPtr& res, const int64_t device_id) : device_id(device_id), move(false), own(true) {
         resource = res.lock();
         Lock();
     }
diff --git a/core/src/scheduler/resource/Resource.cpp b/core/src/scheduler/resource/Resource.cpp
index ca3388945f..d1bb34c0c5 100644
--- a/core/src/scheduler/resource/Resource.cpp
+++ b/core/src/scheduler/resource/Resource.cpp
@@ -184,7 +184,7 @@ Resource::loader_function() {
 
 void
 Resource::executor_function() {
-    SetThreadName("taskexector_th");
+    SetThreadName("taskexecutor_th");
     if (subscriber_) {
         auto event = std::make_shared<StartUpEvent>(shared_from_this());
         subscriber_(std::static_pointer_cast<Event>(event));
diff --git a/core/src/scheduler/task/Path.h b/core/src/scheduler/task/Path.h
index ee48f4976f..7916038eb1 100644
--- a/core/src/scheduler/task/Path.h
+++ b/core/src/scheduler/task/Path.h
@@ -62,6 +62,15 @@ class Path {
         }
     }
 
+    std::string
+    ToString() {
+        std::string str = path_[index_];
+        for (int64_t i = index_; i > 0; i--) {
+            str += "->" + path_[i - 1];
+        }
+        return str;
+    }
+
  public:
     std::string& operator[](uint64_t index) {
         return path_[index];
diff --git a/core/src/scheduler/tasklabel/SpecResLabel.h b/core/src/scheduler/tasklabel/SpecResLabel.h
index b69983bea8..000cee9a55 100644
--- a/core/src/scheduler/tasklabel/SpecResLabel.h
+++ b/core/src/scheduler/tasklabel/SpecResLabel.h
@@ -35,14 +35,13 @@ class SpecResLabel : public TaskLabel {
         return resource_;
     }
 
-    inline std::string&
-    resource_name() {
-        return resource_name_;
+    inline std::string
+    name() const override {
+        return resource_.lock()->name();
     }
 
  private:
     ResourceWPtr resource_;
-    std::string resource_name_;
 };
 
 using SpecResLabelPtr = std::shared_ptr<SpecResLabel>();
diff --git a/core/src/scheduler/tasklabel/TaskLabel.h b/core/src/scheduler/tasklabel/TaskLabel.h
index d413fcb705..38c100901a 100644
--- a/core/src/scheduler/tasklabel/TaskLabel.h
+++ b/core/src/scheduler/tasklabel/TaskLabel.h
@@ -12,6 +12,7 @@
 #pragma once
 
 #include <memory>
+#include <string>
 
 namespace milvus {
 namespace scheduler {
@@ -28,6 +29,11 @@ class TaskLabel {
         return type_;
     }
 
+    virtual inline std::string
+    name() const {
+        return "";
+    }
+
  protected:
     explicit TaskLabel(TaskLabelType type) : type_(type) {
     }