diff --git a/cpp/README.md b/cpp/README.md
index c1cd381442..1b2f507db2 100644
--- a/cpp/README.md
+++ b/cpp/README.md
@@ -53,6 +53,12 @@ If you encounter the following error when building:
 ### Launch server
 Set config in cpp/conf/server_config.yaml
 
+Add milvus/bin/lib to LD_LIBRARY_PATH
+
+```
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/milvus/bin/lib
+```
+
 Then launch server with config:
     cd [build output path]
     start_server.sh
diff --git a/cpp/conf/server_config.template b/cpp/conf/server_config.template
index 6082969fae..c2ed775601 100644
--- a/cpp/conf/server_config.template
+++ b/cpp/conf/server_config.template
@@ -6,7 +6,12 @@ server_config:
 
 db_config:
   db_path: @MILVUS_DB_PATH@             # milvus data storage path
-  db_backend_url: sqlite://:@:/         # meta database uri
+
+  # URI format: dialect://username:password@host:port/database
+  # All parts except dialect are optional, but you MUST include the delimiters
+  # Currently dialect supports mysql or sqlite
+  db_backend_url: sqlite://:@:/
+
   index_building_threshold: 1024   # index building trigger threshold, default: 1024, unit: MB
   archive_disk_threshold: 512      # triger archive action if storage size exceed this value, unit: GB
   archive_days_threshold: 30       # files older than x days will be archived, unit: day