diff --git a/cpp/src/db/DB.h b/cpp/src/db/DB.h
index 39ddaa8f0f..83bd3770dd 100644
--- a/cpp/src/db/DB.h
+++ b/cpp/src/db/DB.h
@@ -15,7 +15,7 @@ class Env;
 
 class DB {
 public:
-    static DB* Open(const Options& options_, const std::string& name_);
+    static DB* Open(const Options& options);
 
     virtual Status add_group(const GroupOptions& options_,
             const std::string& group_id_,
diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 7fc37e6750..2194e2f372 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -15,16 +15,15 @@ namespace zilliz {
 namespace vecwise {
 namespace engine {
 
-DBImpl::DBImpl(const Options& options_, const std::string& name_)
-    : _dbname(name_),
-      _env(options_.env),
-      _options(options_),
+DBImpl::DBImpl(const Options& options)
+    : _env(options.env),
+      _options(options),
       _bg_compaction_scheduled(false),
       _shutting_down(false),
       bg_build_index_started_(false),
       _pMeta(new meta::DBMetaImpl(_options.meta)),
       _pMemMgr(new MemManager(_pMeta)) {
-    start_timer_task(options_.memory_sync_interval);
+    start_timer_task(_options.memory_sync_interval);
 }
 
 Status DBImpl::add_group(const GroupOptions& options,
@@ -249,8 +248,8 @@ DBImpl::~DBImpl() {
 
 DB::~DB() {}
 
-DB* DB::Open(const Options& options_, const std::string& name_) {
-    DBImpl* impl = new DBImpl(options_, name_);
+DB* DB::Open(const Options& options) {
+    DBImpl* impl = new DBImpl(options);
     return impl;
 }
 
diff --git a/cpp/src/db/DBImpl.h b/cpp/src/db/DBImpl.h
index bab06998bb..5ef9050683 100644
--- a/cpp/src/db/DBImpl.h
+++ b/cpp/src/db/DBImpl.h
@@ -20,7 +20,7 @@ namespace meta {
 
 class DBImpl : public DB {
 public:
-    DBImpl(const Options& options_, const std::string& name_);
+    DBImpl(const Options& options);
 
     virtual Status add_group(const GroupOptions& options_,
             const std::string& group_id_,
@@ -57,7 +57,6 @@ private:
     void background_call();
     void background_compaction();
 
-    const std::string& _dbname;
     Env* const _env;
     const Options _options;
 
diff --git a/cpp/src/db/DBMetaImpl.cpp b/cpp/src/db/DBMetaImpl.cpp
index ff4aa75e35..38760d865b 100644
--- a/cpp/src/db/DBMetaImpl.cpp
+++ b/cpp/src/db/DBMetaImpl.cpp
@@ -19,8 +19,8 @@ long GetFileSize(const std::string& filename)
     return rc == 0 ? stat_buf.st_size : -1;
 }
 
-DBMetaImpl::DBMetaImpl(const MetaOptions& options_)
-    : _options(static_cast<const DBMetaOptions&>(options_)) {
+DBMetaImpl::DBMetaImpl(const DBMetaOptions& options_)
+    : _options(options_) {
     initialize();
 }
 
diff --git a/cpp/src/db/DBMetaImpl.h b/cpp/src/db/DBMetaImpl.h
index 1c11bc8b1b..fb49a8ecb4 100644
--- a/cpp/src/db/DBMetaImpl.h
+++ b/cpp/src/db/DBMetaImpl.h
@@ -11,7 +11,7 @@ namespace meta {
 
 class DBMetaImpl : public Meta {
 public:
-    DBMetaImpl(const MetaOptions& options_);
+    DBMetaImpl(const DBMetaOptions& options_);
 
     virtual Status add_group(const GroupOptions& options_,
             const std::string& group_id_,
diff --git a/cpp/src/db/LocalMetaImpl.cpp b/cpp/src/db/LocalMetaImpl.cpp
new file mode 100644
index 0000000000..91b9c98d70
--- /dev/null
+++ b/cpp/src/db/LocalMetaImpl.cpp
@@ -0,0 +1,217 @@
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sstream>
+#include <iostream>
+#include <boost/filesystem.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/json_parser.hpp>
+
+#include <fstream>
+#include "LocalMetaImpl.h"
+#include "IDGenerator.h"
+
+namespace zilliz {
+namespace vecwise {
+namespace engine {
+namespace meta {
+
+long GetFileSize(const std::string& filename)
+{
+    struct stat stat_buf;
+    int rc = stat(filename.c_str(), &stat_buf);
+    return rc == 0 ? stat_buf.st_size : -1;
+}
+
+std::string LocalMetaImpl::GetGroupPath(const std::string& group_id) {
+    return _options.path + "/" + group_id;
+}
+
+std::string LocalMetaImpl::GetGroupMetaPath(const std::string& group_id) {
+    return GetGroupPath(group_id) + "/" + "meta";
+}
+
+LocalMetaImpl::LocalMetaImpl(const DBMetaOptions& options_)
+    : _options(options_) {
+    initialize();
+}
+
+Status LocalMetaImpl::initialize() {
+    if (boost::filesystem::is_directory(_options.path)) {
+    }
+    else if (!boost::filesystem::create_directory(_options.path)) {
+        return Status::InvalidDBPath("Cannot Create " + _options.path);
+    }
+    return Status::OK();
+}
+
+Status LocalMetaImpl::add_group(const GroupOptions& options,
+            const std::string& group_id,
+            GroupSchema& group_info) {
+    std::string real_gid;
+    size_t id = SimpleIDGenerator().getNextIDNumber();
+    if (group_id == "") {
+        std::stringstream ss;
+        ss << id;
+        real_gid = ss.str();
+    } else {
+        real_gid = group_id;
+    }
+
+    bool group_exist;
+    has_group(real_gid, group_exist);
+    if (group_exist) {
+        return Status::GroupError("Group Already Existed " + real_gid);
+    }
+    if (!boost::filesystem::create_directory(GetGroupPath(real_gid))) {
+        return Status::GroupError("Cannot Create Group " + real_gid);
+    }
+
+    group_info.group_id = real_gid;
+    group_info.files_cnt = 0;
+    group_info.id = 0;
+    group_info.location = GetGroupPath(real_gid);
+    group_info.dimension = options.dimension;
+
+    boost::property_tree::ptree out;
+    out.put("files_cnt", group_info.files_cnt);
+    out.put("dimension", group_info.dimension);
+    boost::property_tree::write_json(GetGroupMetaPath(real_gid), out);
+
+    return Status::OK();
+}
+
+Status LocalMetaImpl::get_group(const std::string& group_id, GroupSchema& group_info) {
+    bool group_exist;
+    has_group(group_id, group_exist);
+    if (!group_exist) {
+        return Status::NotFound("Group " + group_id + " Not Found");
+    }
+
+    boost::property_tree::ptree ptree;
+    boost::property_tree::read_json(GetGroupMetaPath(group_id), ptree);
+    auto files_cnt = ptree.get_child("files_cnt").data();
+    auto dimension = ptree.get_child("dimension").data();
+    std::cout << dimension << std::endl;
+    std::cout << files_cnt << std::endl;
+
+    group_info.id = std::stoi(group_id);
+    group_info.group_id = group_id;
+    group_info.files_cnt = std::stoi(files_cnt);
+    group_info.dimension = std::stoi(dimension);
+    group_info.location = GetGroupPath(group_id);
+
+    return Status::OK();
+}
+
+Status LocalMetaImpl::has_group(const std::string& group_id, bool& has_or_not) {
+    has_or_not = boost::filesystem::is_directory(GetGroupPath(group_id));
+    /* if (!has_or_not) return Status::OK(); */
+    /* boost::filesystem::is_regular_file() */
+    return Status::OK();
+}
+
+Status LocalMetaImpl::add_group_file(const std::string& group_id,
+                              GroupFileSchema& group_file_info,
+                              GroupFileSchema::FILE_TYPE file_type) {
+    return add_group_file(group_id, Meta::GetDate(), group_file_info);
+}
+
+Status LocalMetaImpl::add_group_file(const std::string& group_id,
+                              DateT date,
+                              GroupFileSchema& group_file_info,
+                              GroupFileSchema::FILE_TYPE file_type) {
+    //PXU TODO
+    std::stringstream ss;
+    SimpleIDGenerator g;
+    std::string suffix = (file_type == GroupFileSchema::RAW) ? ".raw" : ".index";
+    ss << "/tmp/test/" << date
+                       << "/" << g.getNextIDNumber()
+                       << suffix;
+    group_file_info.group_id = "1";
+    group_file_info.dimension = 64;
+    group_file_info.location = ss.str();
+    group_file_info.date = date;
+    return Status::OK();
+}
+
+Status LocalMetaImpl::files_to_index(GroupFilesSchema& files) {
+    // PXU TODO
+    files.clear();
+    std::stringstream ss;
+    ss << "/tmp/test/" << Meta::GetDate();
+    boost::filesystem::path path(ss.str().c_str());
+    boost::filesystem::directory_iterator end_itr;
+    for (boost::filesystem::directory_iterator itr(path); itr != end_itr; ++itr) {
+        /* std::cout << itr->path().string() << std::endl; */
+        GroupFileSchema f;
+        f.location = itr->path().string();
+        std::string suffixStr = f.location.substr(f.location.find_last_of('.') + 1);
+        if (suffixStr == "index") continue;
+        if (1024*1024*1000 >= GetFileSize(f.location)) continue;
+        std::cout << "[About to index] " << f.location << std::endl;
+        f.date = Meta::GetDate();
+        files.push_back(f);
+    }
+    return Status::OK();
+}
+
+Status LocalMetaImpl::files_to_merge(const std::string& group_id,
+        DatePartionedGroupFilesSchema& files) {
+    //PXU TODO
+    files.clear();
+    std::stringstream ss;
+    ss << "/tmp/test/" << Meta::GetDate();
+    boost::filesystem::path path(ss.str().c_str());
+    boost::filesystem::directory_iterator end_itr;
+    GroupFilesSchema gfiles;
+    DateT date = Meta::GetDate();
+    files[date] = gfiles;
+    for (boost::filesystem::directory_iterator itr(path); itr != end_itr; ++itr) {
+        /* std::cout << itr->path().string() << std::endl; */
+        GroupFileSchema f;
+        f.location = itr->path().string();
+        std::string suffixStr = f.location.substr(f.location.find_last_of('.') + 1);
+        if (suffixStr == "index") continue;
+        if (1024*1024*1000 < GetFileSize(f.location)) continue;
+        std::cout << "About to merge " << f.location << std::endl;
+        files[date].push_back(f);
+    }
+
+    return Status::OK();
+}
+
+Status LocalMetaImpl::has_group_file(const std::string& group_id_,
+                              const std::string& file_id_,
+                              bool& has_or_not_) {
+    //PXU TODO
+    return Status::OK();
+}
+
+Status LocalMetaImpl::get_group_file(const std::string& group_id_,
+                              const std::string& file_id_,
+                              GroupFileSchema& group_file_info_) {
+    //PXU TODO
+    return Status::OK();
+}
+
+Status LocalMetaImpl::get_group_files(const std::string& group_id_,
+                               const int date_delta_,
+                               GroupFilesSchema& group_files_info_) {
+    // PXU TODO
+    return Status::OK();
+}
+
+Status LocalMetaImpl::update_group_file(const GroupFileSchema& group_file_) {
+    //PXU TODO
+    return Status::OK();
+}
+
+Status LocalMetaImpl::update_files(const GroupFilesSchema& files) {
+    //PXU TODO
+    return Status::OK();
+}
+
+} // namespace meta
+} // namespace engine
+} // namespace vecwise
+} // namespace zilliz
diff --git a/cpp/src/db/LocalMetaImpl.h b/cpp/src/db/LocalMetaImpl.h
new file mode 100644
index 0000000000..27da80ae70
--- /dev/null
+++ b/cpp/src/db/LocalMetaImpl.h
@@ -0,0 +1,68 @@
+#ifndef VECENGINE_DB_META_IMPL_H_
+#define VECENGINE_DB_META_IMPL_H_
+
+#include "Meta.h"
+#include "Options.h"
+
+namespace zilliz {
+namespace vecwise {
+namespace engine {
+namespace meta {
+
+class LocalMetaImpl : public Meta {
+public:
+    LocalMetaImpl(const DBMetaOptions& options_);
+
+    virtual Status add_group(const GroupOptions& options_,
+            const std::string& group_id_,
+            GroupSchema& group_info_) override;
+    virtual Status get_group(const std::string& group_id_, GroupSchema& group_info_) override;
+    virtual Status has_group(const std::string& group_id_, bool& has_or_not_) override;
+
+    virtual Status add_group_file(const std::string& group_id,
+                                  DateT date,
+                                  GroupFileSchema& group_file_info,
+                                  GroupFileSchema::FILE_TYPE file_type=GroupFileSchema::RAW) override;
+
+    virtual Status add_group_file(const std::string& group_id_,
+                                  GroupFileSchema& group_file_info_,
+                                  GroupFileSchema::FILE_TYPE file_type=GroupFileSchema::RAW) override;
+
+    virtual Status has_group_file(const std::string& group_id_,
+                                  const std::string& file_id_,
+                                  bool& has_or_not_) override;
+    virtual Status get_group_file(const std::string& group_id_,
+                                  const std::string& file_id_,
+                                  GroupFileSchema& group_file_info_) override;
+    virtual Status update_group_file(const GroupFileSchema& group_file_) override;
+
+    virtual Status get_group_files(const std::string& group_id_,
+                                   const int date_delta_,
+                                   GroupFilesSchema& group_files_info_) override;
+
+    virtual Status update_files(const GroupFilesSchema& files) override;
+
+    virtual Status files_to_merge(const std::string& group_id,
+            DatePartionedGroupFilesSchema& files) override;
+
+    virtual Status files_to_index(GroupFilesSchema&) override;
+
+private:
+
+    std::string GetGroupPath(const std::string& group_id);
+    std::string GetGroupMetaPath(const std::string& group_id);
+
+    Status CreateGroupMeta(const GroupSchema& group_schema);
+
+    Status initialize();
+
+    const DBMetaOptions _options;
+
+}; // LocalMetaImpl
+
+} // namespace meta
+} // namespace engine
+} // namespace vecwise
+} // namespace zilliz
+
+#endif // VECENGINE_DB_META_IMPL_H_
diff --git a/cpp/src/db/Meta.h b/cpp/src/db/Meta.h
index 3a3015961a..54a3241d9a 100644
--- a/cpp/src/db/Meta.h
+++ b/cpp/src/db/Meta.h
@@ -21,7 +21,6 @@ struct GroupSchema {
     size_t files_cnt = 0;
     uint16_t dimension;
     std::string location = "";
-    std::string next_file_location = "";
 }; // GroupSchema
 
 
diff --git a/cpp/src/db/Options.cpp b/cpp/src/db/Options.cpp
index 2757db1c64..42609e0a47 100644
--- a/cpp/src/db/Options.cpp
+++ b/cpp/src/db/Options.cpp
@@ -10,6 +10,11 @@ Options::Options()
     : env(Env::Default()) {
 }
 
+/* DBMetaOptions::DBMetaOptions(const std::string& dbpath, */
+/*         const std::string& uri) */
+/*     : path(dbpath), backend_uri(uri) { */
+/* } */
+
 } // namespace engine
 } // namespace vecwise
 } // namespace zilliz
diff --git a/cpp/src/db/Options.h b/cpp/src/db/Options.h
index cd26f05850..12d57ee28d 100644
--- a/cpp/src/db/Options.h
+++ b/cpp/src/db/Options.h
@@ -9,13 +9,10 @@ namespace engine {
 
 class Env;
 
-struct MetaOptions {
-}; // MetaOptions
-
-
-struct DBMetaOptions : public MetaOptions {
+struct DBMetaOptions {
+    /* DBMetaOptions(const std::string&, const std::string&); */
+    std::string path;
     std::string backend_uri;
-    std::string dbname;
 }; // DBMetaOptions
 
 
diff --git a/cpp/src/db/Status.h b/cpp/src/db/Status.h
index 80be027c9b..8cb8cf7a30 100644
--- a/cpp/src/db/Status.h
+++ b/cpp/src/db/Status.h
@@ -22,10 +22,20 @@ public:
         return Status(kNotFound, msg, msg2);
     }
 
+    static Status InvalidDBPath(const std::string& msg, const std::string& msg2="") {
+        return Status(kInvalidDBPath, msg, msg2);
+    }
+    static Status GroupError(const std::string& msg, const std::string& msg2="") {
+        return Status(kGroupError, msg, msg2);
+    }
+
     bool ok() const { return state_ == nullptr; }
 
     bool IsNotFound() const { return code() == kNotFound; }
 
+    bool IsInvalidDBPath() const { return code() == kInvalidDBPath; }
+    bool IsGroupError() const { return code() == kGroupError; }
+
     std::string ToString() const;
 
 private:
@@ -34,6 +44,9 @@ private:
     enum Code {
         kOK = 0,
         kNotFound,
+
+        kInvalidDBPath,
+        kGroupError,
     };
 
     Code code() const {
diff --git a/cpp/src/server/VecServiceHandler.cpp b/cpp/src/server/VecServiceHandler.cpp
index eda05db9bf..5d4779a674 100644
--- a/cpp/src/server/VecServiceHandler.cpp
+++ b/cpp/src/server/VecServiceHandler.cpp
@@ -21,13 +21,12 @@ namespace {
         if(s_db == nullptr) {
             engine::Options opt;
 
+            std::string db_path = "/tmp/test";
             ConfigNode& config = ServerConfig::GetInstance().GetConfig(CONFIG_SERVER);
             opt.meta.backend_uri = config.GetValue(CONFIG_SERVER_DB_URL);
-            opt.meta.dbname = config.GetValue(CONFIG_SERVER_DB_NAME);
+            opt.meta.path = db_path;
 
-            std::string db_path = "/tmp/test";
-            CommonUtil::CreateDirectory(db_path);
-            s_db = engine::DB::Open(opt, db_path);
+            s_db = engine::DB::Open(opt);
         }
         return s_db;
     }
@@ -210,4 +209,4 @@ VecServiceHandler::search_vector_batch(VecSearchResultList &_return,
 
 }
 }
-}
\ No newline at end of file
+}