diff --git a/cpp/src/sdk/examples/simple/src/ClientTest.cpp b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
index 664be42126..713f58fc2f 100644
--- a/cpp/src/sdk/examples/simple/src/ClientTest.cpp
+++ b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
@@ -40,9 +40,12 @@ namespace {
         BLOCK_SPLITER
         std::cout << "Returned result count: " << topk_query_result_array.size() << std::endl;
 
-        int32_t index = 1;
+        int32_t index = 0;
         for(auto& result : topk_query_result_array) {
-            std::cout << "No. " << std::to_string(index) << " vector top k search result:" << std::endl;
+            index++;
+            std::cout << "No." << std::to_string(index) << " vector top "
+                << std::to_string(result.query_result_arrays.size())
+                << " search result:" << std::endl;
             for(auto& item : result.query_result_arrays) {
                 std::cout << "\t" << std::to_string(item.id) << "\tscore:" << std::to_string(item.score);
                 for(auto& attri : item.column_map) {
@@ -158,6 +161,11 @@ ClientTest::Test(const std::string& address, const std::string& port) {
     ConnectParam param = { address, port };
     conn->Connect(param);
 
+    {//get server version
+        std::string version = conn->ServerVersion();
+        std::cout << "MegaSearch server version: " << version << std::endl;
+    }
+
     {
         std::cout << "ShowTables" << std::endl;
         std::vector<std::string> tables;
@@ -196,6 +204,7 @@ ClientTest::Test(const std::string& address, const std::string& port) {
     }
 
     {//search vectors
+        std::cout << "Waiting data persist. Sleep 10 seconds ..." << std::endl;
         sleep(10);
         std::vector<QueryRecord> record_array;
         BuildVectors(500, 510, nullptr, &record_array);
@@ -212,5 +221,13 @@ ClientTest::Test(const std::string& address, const std::string& port) {
 //        std::cout << "Delete table result: " << stat.ToString() << std::endl;
 //    }
 
+    {//server status
+        std::string status = conn->ServerStatus();
+        std::cout << "Server status before disconnect: " << status << std::endl;
+    }
     Connection::Destroy(conn);
+    {//server status
+        std::string status = conn->ServerStatus();
+        std::cout << "Server status after disconnect: " << status << std::endl;
+    }
 }
\ No newline at end of file
diff --git a/cpp/src/server/MegasearchHandler.cpp b/cpp/src/server/MegasearchHandler.cpp
index 62a9153241..4e7c575606 100644
--- a/cpp/src/server/MegasearchHandler.cpp
+++ b/cpp/src/server/MegasearchHandler.cpp
@@ -32,14 +32,14 @@ MegasearchServiceHandler::DeleteTable(const std::string &table_name) {
 
 void
 MegasearchServiceHandler::CreateTablePartition(const thrift::CreateTablePartitionParam &param) {
-    // Your implementation goes here
-    printf("CreateTablePartition\n");
+    BaseTaskPtr task_ptr = CreateTablePartitionTask::Create(param);
+    MegasearchScheduler::ExecTask(task_ptr);
 }
 
 void
 MegasearchServiceHandler::DeleteTablePartition(const thrift::DeleteTablePartitionParam &param) {
-    // Your implementation goes here
-    printf("DeleteTablePartition\n");
+    BaseTaskPtr task_ptr = DeleteTablePartitionTask::Create(param);
+    MegasearchScheduler::ExecTask(task_ptr);
 }
 
 void
@@ -73,9 +73,8 @@ MegasearchServiceHandler::ShowTables(std::vector<std::string> &_return) {
 
 void
 MegasearchServiceHandler::Ping(std::string& _return, const std::string& cmd) {
-    if(cmd == "version") {
-        _return = "v1.2.0";
-    }
+    BaseTaskPtr task_ptr = PingTask::Create(cmd, _return);
+    MegasearchScheduler::ExecTask(task_ptr);
 }
 
 }
diff --git a/cpp/src/server/MegasearchTask.cpp b/cpp/src/server/MegasearchTask.cpp
index b55ce174a4..a1df83bcb3 100644
--- a/cpp/src/server/MegasearchTask.cpp
+++ b/cpp/src/server/MegasearchTask.cpp
@@ -173,6 +173,44 @@ ServerError DeleteTableTask::OnExecute() {
     return SERVER_NOT_IMPLEMENT;
 }
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+CreateTablePartitionTask::CreateTablePartitionTask(const thrift::CreateTablePartitionParam &param)
+    : BaseTask(DDL_DML_TASK_GROUP),
+      param_(param) {
+
+}
+
+BaseTaskPtr CreateTablePartitionTask::Create(const thrift::CreateTablePartitionParam &param) {
+    return std::shared_ptr<BaseTask>(new CreateTablePartitionTask(param));
+}
+
+ServerError CreateTablePartitionTask::OnExecute() {
+    error_code_ = SERVER_NOT_IMPLEMENT;
+    error_msg_ = "create table partition not implemented";
+    SERVER_LOG_ERROR << error_msg_;
+
+    return SERVER_NOT_IMPLEMENT;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+DeleteTablePartitionTask::DeleteTablePartitionTask(const thrift::DeleteTablePartitionParam &param)
+    : BaseTask(DDL_DML_TASK_GROUP),
+      param_(param) {
+
+}
+
+BaseTaskPtr DeleteTablePartitionTask::Create(const thrift::DeleteTablePartitionParam &param) {
+    return std::shared_ptr<BaseTask>(new DeleteTablePartitionTask(param));
+}
+
+ServerError DeleteTablePartitionTask::OnExecute() {
+    error_code_ = SERVER_NOT_IMPLEMENT;
+    error_msg_ = "delete table partition not implemented";
+    SERVER_LOG_ERROR << error_msg_;
+
+    return SERVER_NOT_IMPLEMENT;
+}
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 ShowTablesTask::ShowTablesTask(std::vector<std::string>& tables)
     : BaseTask(PING_TASK_GROUP),
@@ -408,8 +446,8 @@ ServerError SearchVectorTask::OnExecute() {
                 AttribMap attrib_map;
                 AttributeSerializer::Decode(attrib_str, attrib_map);
 
-                for(auto& attri : record.selected_column_array) {
-                    thrift_result.column_map[attri] = attrib_map[attri];
+                for(auto& attribute : record.selected_column_array) {
+                    thrift_result.column_map[attribute] = attrib_map[attribute];
                 }
 
                 thrift_topk_result.query_result_arrays.emplace_back(thrift_result);
@@ -429,6 +467,26 @@ ServerError SearchVectorTask::OnExecute() {
     return SERVER_SUCCESS;
 }
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+PingTask::PingTask(const std::string& cmd, std::string& result)
+    : BaseTask(PING_TASK_GROUP),
+      cmd_(cmd),
+      result_(result) {
+
+}
+
+BaseTaskPtr PingTask::Create(const std::string& cmd, std::string& result) {
+    return std::shared_ptr<BaseTask>(new PingTask(cmd, result));
+}
+
+ServerError PingTask::OnExecute() {
+    if(cmd_ == "version") {
+        result_ = "v1.2.0";//currently hardcode
+    }
+
+    return SERVER_SUCCESS;
+}
+
 }
 }
 }
diff --git a/cpp/src/server/MegasearchTask.h b/cpp/src/server/MegasearchTask.h
index b60351de64..af4178eb21 100644
--- a/cpp/src/server/MegasearchTask.h
+++ b/cpp/src/server/MegasearchTask.h
@@ -65,6 +65,36 @@ private:
     std::string table_name_;
 };
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+class CreateTablePartitionTask : public BaseTask {
+public:
+    static BaseTaskPtr Create(const thrift::CreateTablePartitionParam &param);
+
+protected:
+    CreateTablePartitionTask(const thrift::CreateTablePartitionParam &param);
+
+    ServerError OnExecute() override;
+
+
+private:
+    const thrift::CreateTablePartitionParam &param_;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+class DeleteTablePartitionTask : public BaseTask {
+public:
+    static BaseTaskPtr Create(const thrift::DeleteTablePartitionParam &param);
+
+protected:
+    DeleteTablePartitionTask(const thrift::DeleteTablePartitionParam &param);
+
+    ServerError OnExecute() override;
+
+
+private:
+    const thrift::DeleteTablePartitionParam &param_;
+};
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 class ShowTablesTask : public BaseTask {
 public:
@@ -122,6 +152,21 @@ private:
     std::vector<thrift::TopKQueryResult>& result_array_;
 };
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+class PingTask : public BaseTask {
+public:
+    static BaseTaskPtr Create(const std::string& cmd, std::string& result);
+
+protected:
+    PingTask(const std::string& cmd, std::string& result);
+
+    ServerError OnExecute() override;
+
+private:
+    std::string cmd_;
+    std::string& result_;
+};
+
 }
 }
 }
\ No newline at end of file