diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 0c35c355d5927d214a605525115c209134f2f329..e8deac90916a6f4725c968258d41c14445eb7c26 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -19,7 +19,7 @@ DBImpl::DBImpl(const Options& options_, const std::string& name_)
       _options(options_),
       _bg_compaction_scheduled(false),
       _shutting_down(false),
-      _pMeta(new meta::DBMetaImpl(*(_options.pMetaOptions))),
+      _pMeta(new meta::DBMetaImpl(_options.meta)),
       _pMemMgr(new MemManager(_pMeta)) {
     start_timer_task(options_.memory_sync_interval);
 }
diff --git a/cpp/src/db/DBMetaImpl.h b/cpp/src/db/DBMetaImpl.h
index cd84d86db5e090941bb9a01cc216a36ab1284090..4bf159cfd4b29c329396534297c20ead25df2a6c 100644
--- a/cpp/src/db/DBMetaImpl.h
+++ b/cpp/src/db/DBMetaImpl.h
@@ -45,7 +45,7 @@ private:
 
     Status initialize();
 
-    const DBMetaOptions& _options;
+    const DBMetaOptions _options;
 
 }; // DBMetaImpl
 
diff --git a/cpp/src/db/Options.cpp b/cpp/src/db/Options.cpp
index 024f2aba5d7ef9b4555dc1882776bff581f6d27b..2757db1c640ea0e4f7fb9c7700465e3f4daad4da 100644
--- a/cpp/src/db/Options.cpp
+++ b/cpp/src/db/Options.cpp
@@ -1,5 +1,6 @@
 #include "Options.h"
 #include "Env.h"
+#include "DBMetaImpl.h"
 
 namespace zilliz {
 namespace vecwise {
diff --git a/cpp/src/db/Options.h b/cpp/src/db/Options.h
index 807bae38b256830a1f8a8e9cb132b849d76a562d..cd26f058509f8395a439c8753947618c6cc3401b 100644
--- a/cpp/src/db/Options.h
+++ b/cpp/src/db/Options.h
@@ -7,16 +7,25 @@ namespace zilliz {
 namespace vecwise {
 namespace engine {
 
-class MetaOptions;
 class Env;
 
+struct MetaOptions {
+}; // MetaOptions
+
+
+struct DBMetaOptions : public MetaOptions {
+    std::string backend_uri;
+    std::string dbname;
+}; // DBMetaOptions
+
+
 struct Options {
     Options();
     uint16_t  memory_sync_interval = 10;
     uint16_t  raw_file_merge_trigger_number = 100;
     size_t  raw_to_index_trigger_size = 100000;
-    std::shared_ptr<MetaOptions> pMetaOptions;
     Env* env;
+    DBMetaOptions meta;
 }; // Options
 
 
@@ -26,16 +35,6 @@ struct GroupOptions {
 }; // GroupOptions
 
 
-struct MetaOptions {
-}; // MetaOptions
-
-
-struct DBMetaOptions : public MetaOptions {
-    std::string backend_uri;
-    std::string dbname;
-}; // DBMetaOptions
-
-
 } // namespace engine
 } // namespace vecwise
 } // namespace zilliz