diff --git a/cpp/coverage.sh b/cpp/coverage.sh
index 3415e752bdc3879e533ab1a1084a3e1ccc7c1610..54cf4807037d914b767eae6334b0aefa488b5587 100755
--- a/cpp/coverage.sh
+++ b/cpp/coverage.sh
@@ -20,15 +20,20 @@ if [ $? -ne 0 ]; then
 fi
 
 for test in `ls ${DIR_UNITTEST}`; do
-    echo $test
-    case ${test} in 
+    case ${test} in
+        db_test)
+            # set run args for db_test
+            args="mysql://root:Fantast1c@192.168.1.194:3306/test"
+            ;;
         *_test)
-            # run unittest
-            ./${DIR_UNITTEST}/${test}
-            if [ $? -ne 0 ]; then
-                echo ${DIR_UNITTEST}/${test} "run failed"
-            fi
+            args=""
+            ;;
     esac
+    # run unittest
+    ./${DIR_UNITTEST}/${test} "${args}"
+    if [ $? -ne 0 ]; then
+        echo ${DIR_UNITTEST}/${test} "run failed"
+    fi
 done
 
 # gen test converage
diff --git a/cpp/unittest/db/MySQLMetaImpl_test.cpp b/cpp/unittest/db/MySQLMetaImpl_test.cpp
index 57fad28468e51ed74262c242dc923b9589cc9b8b..93e0ce9b28ed198fbbe11351b84a41af241274f1 100644
--- a/cpp/unittest/db/MySQLMetaImpl_test.cpp
+++ b/cpp/unittest/db/MySQLMetaImpl_test.cpp
@@ -36,7 +36,8 @@ TEST_F(MySQLTest, core) {
 //    //dialect+driver://username:password@host:port/database
 //    options.backend_uri = "mysql://root:1234@:/test";
 //    options.path = "/tmp/vecwise_test";
-    meta::MySQLMetaImpl impl(getDBMetaOptions());
+    int mode = Options::MODE::SINGLE;
+    meta::MySQLMetaImpl impl(getDBMetaOptions(), mode);
 //    auto status = impl.Initialize();
 //    ASSERT_TRUE(status.ok());
 
@@ -58,7 +59,7 @@ TEST_F(MySQLTest, core) {
     status = impl.CreateTable(schema2);
 //    std::cout << status.ToString() << std::endl;
 //    ASSERT_THROW(impl.CreateTable(schema), mysqlpp::BadQuery);
-    ASSERT_FALSE(status.ok());
+    ASSERT_TRUE(status.ok());
 
     status = impl.DeleteTable(schema2.table_id_);
 //    std::cout << status.ToString() << std::endl;
@@ -191,8 +192,9 @@ TEST_F(MySQLTest, core) {
 }
 
 TEST_F(MySQLTest, GROUP_TEST) {
-    
-    meta::MySQLMetaImpl impl(getDBMetaOptions());
+
+    int mode = Options::MODE::SINGLE;
+    meta::MySQLMetaImpl impl(getDBMetaOptions(), mode);
 
     auto table_id = "meta_test_group";
 
@@ -214,7 +216,12 @@ TEST_F(MySQLTest, GROUP_TEST) {
 
     group.table_id_ = table_id;
     status = impl.CreateTable(group);
-    ASSERT_TRUE(!status.ok());
+    ASSERT_TRUE(status.ok());
+
+    group.table_id_ = "";
+    status = impl.CreateTable(group);
+    ASSERT_TRUE(status.ok());
+
 
     status = impl.DropAll();
     ASSERT_TRUE(status.ok());
@@ -222,12 +229,14 @@ TEST_F(MySQLTest, GROUP_TEST) {
 
 TEST_F(MySQLTest, table_file_TEST) {
 
-    meta::MySQLMetaImpl impl(getDBMetaOptions());
+    int mode = Options::MODE::SINGLE;
+    meta::MySQLMetaImpl impl(getDBMetaOptions(), mode);
 
     auto table_id = "meta_test_group";
 
     meta::TableSchema group;
     group.table_id_ = table_id;
+    group.dimension_ = 256;
     auto status = impl.CreateTable(group);
 
     meta::TableFileSchema table_file;
@@ -237,6 +246,11 @@ TEST_F(MySQLTest, table_file_TEST) {
     ASSERT_TRUE(status.ok());
     ASSERT_EQ(table_file.file_type_, meta::TableFileSchema::NEW);
 
+    uint64_t cnt = 0;
+    status = impl.Count(table_id, cnt);
+    ASSERT_TRUE(status.ok());
+    ASSERT_EQ(cnt, 0UL);
+
     auto file_id = table_file.file_id_;
 
     auto new_file_type = meta::TableFileSchema::INDEX;
@@ -287,8 +301,8 @@ TEST_F(MySQLTest, ARCHIVE_TEST_DAYS) {
     std::stringstream ss;
     ss << "days:" << days_num;
     options.archive_conf = ArchiveConf("delete", ss.str());
-
-    meta::MySQLMetaImpl impl(options);
+    int mode = Options::MODE::SINGLE;
+    meta::MySQLMetaImpl impl(options, mode);
 
     auto table_id = "meta_test_group";
 
@@ -336,11 +350,10 @@ TEST_F(MySQLTest, ARCHIVE_TEST_DAYS) {
 }
 
 TEST_F(MySQLTest, ARCHIVE_TEST_DISK) {
-    DBMetaOptions options;
-    options.path = "/tmp/milvus_test";
+    DBMetaOptions options = getDBMetaOptions();
     options.archive_conf = ArchiveConf("delete", "disk:11");
-
-    auto impl = meta::DBMetaImpl(options);
+    int mode = Options::MODE::SINGLE;
+    auto impl = meta::MySQLMetaImpl(options, mode);
     auto table_id = "meta_test_group";
 
     meta::TableSchema group;
@@ -385,7 +398,8 @@ TEST_F(MySQLTest, ARCHIVE_TEST_DISK) {
 
 TEST_F(MySQLTest, TABLE_FILES_TEST) {
 
-    auto impl = meta::DBMetaImpl(getDBMetaOptions());
+    int mode = Options::MODE::SINGLE;
+    auto impl = meta::MySQLMetaImpl(getDBMetaOptions(), mode);
 
     auto table_id = "meta_test_group";
 
diff --git a/cpp/unittest/db/db_tests.cpp b/cpp/unittest/db/db_tests.cpp
index b1738abcdf456634ac0d7daccac2b6774d33f40c..b5eb8e642b7e2b23f0dd19c07968d7ef5fda1d18 100644
--- a/cpp/unittest/db/db_tests.cpp
+++ b/cpp/unittest/db/db_tests.cpp
@@ -293,20 +293,14 @@ TEST_F(MySQLDBTest, DB_TEST) {
     auto options = GetOptions();
     auto db_ = engine::DBFactory::Build(options);
 
-    static const std::string table_name = "test_group";
-    static const int table_dim = 256;
-
-    engine::meta::TableSchema table_info;
-    table_info.dimension_ = table_dim;
-    table_info.table_id_ = table_name;
-    table_info.engine_type_ = (int)engine::EngineType::FAISS_IDMAP;
+    engine::meta::TableSchema table_info = BuildTableSchema();
     engine::Status stat = db_->CreateTable(table_info);
 
     engine::meta::TableSchema table_info_get;
-    table_info_get.table_id_ = table_name;
+    table_info_get.table_id_ = TABLE_NAME;
     stat = db_->DescribeTable(table_info_get);
     ASSERT_STATS(stat);
-    ASSERT_EQ(table_info_get.dimension_, table_dim);
+    ASSERT_EQ(table_info_get.dimension_, TABLE_DIM);
 
     engine::IDNumbers vector_ids;
     engine::IDNumbers target_ids;
@@ -335,7 +329,7 @@ TEST_F(MySQLDBTest, DB_TEST) {
             prev_count = count;
 
             START_TIMER;
-            stat = db_->Query(table_name, k, qb, qxb.data(), results);
+            stat = db_->Query(TABLE_NAME, k, qb, qxb.data(), results);
             ss << "Search " << j << " With Size " << count/engine::meta::M << " M";
             STOP_TIMER(ss.str());
 
@@ -358,10 +352,10 @@ TEST_F(MySQLDBTest, DB_TEST) {
 
     for (auto i=0; i<loop; ++i) {
         if (i==40) {
-            db_->InsertVectors(table_name, qb, qxb.data(), target_ids);
+            db_->InsertVectors(TABLE_NAME, qb, qxb.data(), target_ids);
             ASSERT_EQ(target_ids.size(), qb);
         } else {
-            db_->InsertVectors(table_name, nb, xb.data(), vector_ids);
+            db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
         }
         std::this_thread::sleep_for(std::chrono::microseconds(1));
     }
@@ -447,6 +441,18 @@ TEST_F(MySQLDBTest, ARHIVE_DISK_CHECK) {
     engine::meta::TableSchema table_info = BuildTableSchema();
     engine::Status stat = db_->CreateTable(table_info);
 
+    std::vector<engine::meta::TableSchema> table_schema_array;
+    stat = db_->AllTables(table_schema_array);
+    ASSERT_STATS(stat);
+    bool bfound = false;
+    for(auto& schema : table_schema_array) {
+        if(schema.table_id_ == TABLE_NAME) {
+            bfound = true;
+            break;
+        }
+    }
+    ASSERT_TRUE(bfound);
+
     engine::meta::TableSchema table_info_get;
     table_info_get.table_id_ = TABLE_NAME;
     stat = db_->DescribeTable(table_info_get);
diff --git a/cpp/unittest/db/utils.cpp b/cpp/unittest/db/utils.cpp
index 1f2ec5399ca5851eb01c4d3079e05bc762884b64..6b1fc1e407d7eea883cc5b7e2a79e1ac9486a2f1 100644
--- a/cpp/unittest/db/utils.cpp
+++ b/cpp/unittest/db/utils.cpp
@@ -53,6 +53,7 @@ void DBTest::InitLog() {
 engine::Options DBTest::GetOptions() {
     auto options = engine::OptionsFactory::Build();
     options.meta.path = "/tmp/milvus_test";
+    options.meta.backend_uri = "sqlite://:@:/";
     return options;
 }
 
@@ -71,6 +72,7 @@ engine::Options DBTest2::GetOptions() {
     auto options = engine::OptionsFactory::Build();
     options.meta.path = "/tmp/milvus_test";
     options.meta.archive_conf = engine::ArchiveConf("delete", "disk:1");
+    options.meta.backend_uri = "sqlite://:@:/";
     return options;
 }