diff --git a/cpp/src/sdk/examples/simple/CMakeLists.txt b/cpp/src/sdk/examples/simple/CMakeLists.txt
index 5a249bd60993eec4ab7e03933b1d0406b66b2673..3b51a6ae864a01fd5c89757ff131f09ead92144b 100644
--- a/cpp/src/sdk/examples/simple/CMakeLists.txt
+++ b/cpp/src/sdk/examples/simple/CMakeLists.txt
@@ -8,14 +8,12 @@ aux_source_directory(src src_files)
 
 include_directories(src)
 include_directories(../../megasearch_sdk/include)
-include_directories(/usr/include)
 
 link_directories(${CMAKE_BINARY_DIR}/megasearch_sdk)
 
 add_executable(sdk_simple
         ./main.cpp
         ${src_files}
-        ${service_files}
         )
 
 target_link_libraries(sdk_simple
diff --git a/cpp/src/sdk/examples/simple/main.cpp b/cpp/src/sdk/examples/simple/main.cpp
index 2701f9e6600d9d6e4cf98b0fb38258448dd5f2fd..722d40de4fdccb1e959e33526a09d292020abf40 100644
--- a/cpp/src/sdk/examples/simple/main.cpp
+++ b/cpp/src/sdk/examples/simple/main.cpp
@@ -19,7 +19,8 @@ main(int argc, char *argv[]) {
     printf("Client start...\n");
 
     std::string app_name = basename(argv[0]);
-    static struct option long_options[] = {{"conf_file", optional_argument, 0, 'c'},
+    static struct option long_options[] = {{"server", optional_argument, 0, 's'},
+                                           {"port", optional_argument, 0, 'p'},
                                            {"help", no_argument, 0, 'h'},
                                            {NULL, 0, 0, 0}};
 
@@ -28,9 +29,9 @@ main(int argc, char *argv[]) {
     app_name = argv[0];
 
     int value;
-    while ((value = getopt_long(argc, argv, "c:p:dh", long_options, &option_index)) != -1) {
+    while ((value = getopt_long(argc, argv, "s:p:h", long_options, &option_index)) != -1) {
         switch (value) {
-            case 'h': {
+            case 's': {
                 char *address_ptr = strdup(optarg);
                 address = address_ptr;
                 free(address_ptr);
@@ -38,12 +39,14 @@ main(int argc, char *argv[]) {
             }
             case 'p': {
                 char *port_ptr = strdup(optarg);
-                address = port_ptr;
+                port = port_ptr;
                 free(port_ptr);
                 break;
             }
+            case 'h':
             default:
-                break;
+                print_help(app_name);
+                return EXIT_SUCCESS;
         }
     }
 
@@ -58,7 +61,8 @@ void
 print_help(const std::string &app_name) {
     printf("\n Usage: %s [OPTIONS]\n\n", app_name.c_str());
     printf("  Options:\n");
-    printf("   -h    Megasearch server address\n");
-    printf("   -p    Megasearch server port\n");
+    printf("   -s --server   Server address, default 127.0.0.1\n");
+    printf("   -p --port     Server port, default 33001\n");
+    printf("   -h --help     Print help information\n");
     printf("\n");
 }
\ No newline at end of file
diff --git a/cpp/src/sdk/examples/simple/src/ClientTest.cpp b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
index b57ab75c37cd76e06c9c2df3b2076bdc0f59f251..bf1ec0b61e3b64a5ed57bec9d490d400fd0a28d9 100644
--- a/cpp/src/sdk/examples/simple/src/ClientTest.cpp
+++ b/cpp/src/sdk/examples/simple/src/ClientTest.cpp
@@ -13,6 +13,16 @@
 using namespace megasearch;
 
 namespace {
+    std::string GetTableName();
+
+    static const std::string TABLE_NAME = GetTableName();
+    static const std::string VECTOR_COLUMN_NAME = "face_vector";
+    static const std::string ID_COLUMN_NAME = "aid";
+    static const std::string CITY_COLUMN_NAME = "city";
+    static constexpr int64_t TABLE_DIMENSION = 512;
+    static constexpr int64_t TOTAL_ROW_COUNT = 100000;
+    static constexpr int64_t TOP_K = 10;
+    static constexpr int64_t SEARCH_TARGET = 5000; //change this value, result is different
 
 #define BLOCK_SPLITER std::cout << "===========================================" << std::endl;
 
@@ -76,12 +86,6 @@ namespace {
         return s_id;
     }
 
-    static const std::string TABLE_NAME = GetTableName();
-    static const std::string VECTOR_COLUMN_NAME = "face_vector";
-    static const std::string AGE_COLUMN_NAME = "age";
-    static const std::string CITY_COLUMN_NAME = "city";
-    static const int64_t TABLE_DIMENSION = 512;
-
     TableSchema BuildTableSchema() {
         TableSchema tb_schema;
         VectorColumn col1;
@@ -90,7 +94,7 @@ namespace {
         col1.store_raw_vector = true;
         tb_schema.vector_column_array.emplace_back(col1);
 
-        Column col2 = {ColumnType::int8, AGE_COLUMN_NAME};
+        Column col2 = {ColumnType::int8, ID_COLUMN_NAME};
         tb_schema.attribute_column_array.emplace_back(col2);
 
         Column col3 = {ColumnType::int16, CITY_COLUMN_NAME};
@@ -139,7 +143,7 @@ namespace {
             if(vector_record_array) {
                 RowRecord record;
                 record.vector_map.insert(std::make_pair(VECTOR_COLUMN_NAME, f_p));
-                record.attribute_map[AGE_COLUMN_NAME] = std::to_string(k%100);
+                record.attribute_map[ID_COLUMN_NAME] = std::to_string(k);
                 record.attribute_map[CITY_COLUMN_NAME] = CITY_MAP.at(k%CITY_MAP.size());
                 vector_record_array->emplace_back(record);
             }
@@ -147,7 +151,7 @@ namespace {
             if(query_record_array) {
                 QueryRecord record;
                 record.vector_map.insert(std::make_pair(VECTOR_COLUMN_NAME, f_p));
-                record.selected_column_array.push_back(AGE_COLUMN_NAME);
+                record.selected_column_array.push_back(ID_COLUMN_NAME);
                 record.selected_column_array.push_back(CITY_COLUMN_NAME);
                 query_record_array->emplace_back(record);
             }
@@ -161,16 +165,20 @@ ClientTest::Test(const std::string& address, const std::string& port) {
     ConnectParam param = { address, port };
     conn->Connect(param);
 
-    {//get server version
+    {//server version
         std::string version = conn->ServerVersion();
         std::cout << "MegaSearch server version: " << version << std::endl;
     }
 
+    {//sdk version
+        std::string version = conn->ClientVersion();
+        std::cout << "SDK version: " << version << std::endl;
+    }
+
     {
-        std::cout << "ShowTables" << std::endl;
         std::vector<std::string> tables;
         Status stat = conn->ShowTables(tables);
-        std::cout << "Function call status: " << stat.ToString() << std::endl;
+        std::cout << "ShowTables function call status: " << stat.ToString() << std::endl;
         std::cout << "All tables: " << std::endl;
         for(auto& table : tables) {
             std::cout << "\t" << table << std::endl;
@@ -180,26 +188,23 @@ ClientTest::Test(const std::string& address, const std::string& port) {
     {//create table
         TableSchema tb_schema = BuildTableSchema();
         PrintTableSchema(tb_schema);
-        std::cout << "CreateTable" << std::endl;
         Status stat = conn->CreateTable(tb_schema);
-        std::cout << "Function call status: " << stat.ToString() << std::endl;
+        std::cout << "CreateTable function call status: " << stat.ToString() << std::endl;
     }
 
     {//describe table
         TableSchema tb_schema;
-        std::cout << "DescribeTable" << std::endl;
         Status stat = conn->DescribeTable(TABLE_NAME, tb_schema);
-        std::cout << "Function call status: " << stat.ToString() << std::endl;
+        std::cout << "DescribeTable function call status: " << stat.ToString() << std::endl;
         PrintTableSchema(tb_schema);
     }
 
     {//add vectors
         std::vector<RowRecord> record_array;
-        BuildVectors(0, 10000, &record_array, nullptr);
+        BuildVectors(0, TOTAL_ROW_COUNT, &record_array, nullptr);
         std::vector<int64_t> record_ids;
-        std::cout << "AddVector" << std::endl;
         Status stat = conn->AddVector(TABLE_NAME, record_array, record_ids);
-        std::cout << "Function call status: " << stat.ToString() << std::endl;
+        std::cout << "AddVector function call status: " << stat.ToString() << std::endl;
         PrintRecordIdArray(record_ids);
     }
 
@@ -207,18 +212,17 @@ ClientTest::Test(const std::string& address, const std::string& port) {
         std::cout << "Waiting data persist. Sleep 10 seconds ..." << std::endl;
         sleep(10);
         std::vector<QueryRecord> record_array;
-        BuildVectors(500, 510, nullptr, &record_array);
+        BuildVectors(SEARCH_TARGET, SEARCH_TARGET + 10, nullptr, &record_array);
 
         std::vector<TopKQueryResult> topk_query_result_array;
-        std::cout << "SearchVector" << std::endl;
-        Status stat = conn->SearchVector(TABLE_NAME, record_array, topk_query_result_array, 10);
-        std::cout << "Function call status: " << stat.ToString() << std::endl;
+        Status stat = conn->SearchVector(TABLE_NAME, record_array, topk_query_result_array, TOP_K);
+        std::cout << "SearchVector function call status: " << stat.ToString() << std::endl;
         PrintSearchResult(topk_query_result_array);
     }
 
 //    {//delete table
 //        Status stat = conn->DeleteTable(TABLE_NAME);
-//        std::cout << "Delete table result: " << stat.ToString() << std::endl;
+//        std::cout << "DeleteTable function call status: " << stat.ToString() << std::endl;
 //    }
 
     {//server status
diff --git a/cpp/src/server/RocksIdMapper.cpp b/cpp/src/server/RocksIdMapper.cpp
index 37c67d88ec5203a607189eb2c0e42344dfdb9485..3ac887a61087af1c16dd03d74b0d7dd2386eca43 100644
--- a/cpp/src/server/RocksIdMapper.cpp
+++ b/cpp/src/server/RocksIdMapper.cpp
@@ -9,6 +9,7 @@
 #include "utils/Log.h"
 #include "utils/CommonUtil.h"
 
+#include "rocksdb/db.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/options.h"
 
diff --git a/cpp/src/server/RocksIdMapper.h b/cpp/src/server/RocksIdMapper.h
index 714a4ef47b7c815ef67d456154c81264c175dd9b..777fbf08a6645c646c60d90911ddb9c690cdbddc 100644
--- a/cpp/src/server/RocksIdMapper.h
+++ b/cpp/src/server/RocksIdMapper.h
@@ -8,13 +8,16 @@
 #include "utils/Error.h"
 #include "VecIdMapper.h"
 
-#include "rocksdb/db.h"
-
 #include <string>
 #include <vector>
 #include <unordered_map>
 #include <mutex>
 
+namespace rocksdb {
+    class DB;
+    class ColumnFamilyHandle;
+}
+
 namespace zilliz {
 namespace vecwise {
 namespace server {
diff --git a/cpp/src/server/VecIdMapper.cpp b/cpp/src/server/VecIdMapper.cpp
index df24a9c729eb025295a0953431bbbec5ecf0d2e2..aece541d9105018c6ad558d94f99f0331b69f463 100644
--- a/cpp/src/server/VecIdMapper.cpp
+++ b/cpp/src/server/VecIdMapper.cpp
@@ -15,6 +15,7 @@
 #include "rocksdb/options.h"
 
 #include <exception>
+#include <unordered_map>
 
 namespace zilliz {
 namespace vecwise {
@@ -30,6 +31,30 @@ IVecIdMapper* IVecIdMapper::GetInstance() {
 #endif
 }
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+class SimpleIdMapper : public IVecIdMapper{
+public:
+    SimpleIdMapper();
+    ~SimpleIdMapper();
+
+    ServerError AddGroup(const std::string& group) override;
+    bool IsGroupExist(const std::string& group) const override;
+    ServerError AllGroups(std::vector<std::string>& groups) const override;
+
+    ServerError Put(const std::string& nid, const std::string& sid, const std::string& group = "") override;
+    ServerError Put(const std::vector<std::string>& nid, const std::vector<std::string>& sid, const std::string& group = "") override;
+
+    ServerError Get(const std::string& nid, std::string& sid, const std::string& group = "") const override;
+    ServerError Get(const std::vector<std::string>& nid, std::vector<std::string>& sid, const std::string& group = "") const override;
+
+    ServerError Delete(const std::string& nid, const std::string& group = "") override;
+    ServerError DeleteGroup(const std::string& group) override;
+
+private:
+    using ID_MAPPING = std::unordered_map<std::string, std::string>;
+    mutable std::unordered_map<std::string, ID_MAPPING> id_groups_;
+};
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 SimpleIdMapper::SimpleIdMapper() {
 
diff --git a/cpp/src/server/VecIdMapper.h b/cpp/src/server/VecIdMapper.h
index 7dcdc1dd2a029635e10a6d49ee69c8bca0c5a36a..658eb7f3fb43953b0da4b6b466eb0b057afc4ed9 100644
--- a/cpp/src/server/VecIdMapper.h
+++ b/cpp/src/server/VecIdMapper.h
@@ -9,11 +9,6 @@
 
 #include <string>
 #include <vector>
-#include <unordered_map>
-
-namespace rocksdb {
-    class DB;
-}
 
 namespace zilliz {
 namespace vecwise {
@@ -40,29 +35,6 @@ public:
     virtual ServerError DeleteGroup(const std::string& group) = 0;
 };
 
-class SimpleIdMapper : public IVecIdMapper{
-public:
-    SimpleIdMapper();
-    ~SimpleIdMapper();
-
-    ServerError AddGroup(const std::string& group) override;
-    bool IsGroupExist(const std::string& group) const override;
-    ServerError AllGroups(std::vector<std::string>& groups) const override;
-
-    ServerError Put(const std::string& nid, const std::string& sid, const std::string& group = "") override;
-    ServerError Put(const std::vector<std::string>& nid, const std::vector<std::string>& sid, const std::string& group = "") override;
-
-    ServerError Get(const std::string& nid, std::string& sid, const std::string& group = "") const override;
-    ServerError Get(const std::vector<std::string>& nid, std::vector<std::string>& sid, const std::string& group = "") const override;
-
-    ServerError Delete(const std::string& nid, const std::string& group = "") override;
-    ServerError DeleteGroup(const std::string& group) override;
-
-private:
-    using ID_MAPPING = std::unordered_map<std::string, std::string>;
-    mutable std::unordered_map<std::string, ID_MAPPING> id_groups_;
-};
-
 }
 }
 }