diff --git a/include/common/tep.h b/include/common/tep.h
index bdc25f6b82..715a116bb7 100644
--- a/include/common/tep.h
+++ b/include/common/tep.h
@@ -1,6 +1,6 @@
 #ifndef TDENGINE_TEP_H
 #define TDENGINE_TEP_H
 
-int     taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
+int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port);
 
 #endif  // TDENGINE_TEP_H
diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index df5f6b7c22..e66c66de07 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -185,7 +185,7 @@ extern SDiskCfg tsDiskCfg[];
 #define NEEDTO_COMPRESSS_MSG(size) (tsCompressMsgSize != -1 && (size) > tsCompressMsgSize)
 
 void    taosInitGlobalCfg();
-int32_t taosCheckGlobalCfg();
+int32_t taosCheckAndPrintCfg();
 int32_t taosCfgDynamicOptions(char *msg);
 bool    taosCheckBalanceCfgOptions(const char *option, int32_t *vnodeId, int32_t *dnodeId);
 void    taosAddDataDir(int index, char *v1, int level, int primary);
diff --git a/include/os/osSemaphore.h b/include/os/osSemaphore.h
index 86a9f10819..78112fc7a0 100644
--- a/include/os/osSemaphore.h
+++ b/include/os/osSemaphore.h
@@ -57,7 +57,7 @@ int64_t taosGetPthreadId(pthread_t thread);
 void    taosResetPthread(pthread_t* thread);
 bool    taosComparePthread(pthread_t first, pthread_t second);
 int32_t taosGetPId();
-int32_t taosGetCurrentAPPName(char* name, int32_t* len);
+int32_t taosGetAppName(char* name, int32_t* len);
 
 #ifdef __cplusplus
 }
diff --git a/include/util/tconfig.h b/include/util/tconfig.h
index 15100423d5..18c21d238c 100644
--- a/include/util/tconfig.h
+++ b/include/util/tconfig.h
@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define TSDB_CFG_MAX_NUM    123
+#define TSDB_CFG_MAX_NUM    119
 #define TSDB_CFG_PRINT_LEN  23
 #define TSDB_CFG_OPTION_LEN 24
 #define TSDB_CFG_VALUE_LEN  41
@@ -83,11 +83,11 @@ extern int32_t    tsGlobalConfigNum;
 extern char *     tsCfgStatusStr[];
 
 void    taosReadGlobalLogCfg();
-int32_t taosReadGlobalCfg();
-void    taosPrintGlobalCfg();
+int32_t taosReadCfgFromFile();
+void    taosPrintCfg();
 void    taosDumpGlobalCfg();
 
-void        taosInitConfigOption(SGlobalCfg cfg);
+void        taosAddConfigOption(SGlobalCfg cfg);
 SGlobalCfg *taosGetConfigOption(const char *option);
 
 #ifdef __cplusplus
diff --git a/source/client/CMakeLists.txt b/source/client/CMakeLists.txt
index 5a47602dcd..1a67faea9f 100644
--- a/source/client/CMakeLists.txt
+++ b/source/client/CMakeLists.txt
@@ -10,3 +10,5 @@ target_link_libraries(
     INTERFACE api
     PRIVATE os util common transport parser
 )
+
+ADD_SUBDIRECTORY(test)
\ No newline at end of file
diff --git a/source/client/inc/clientInt.h b/source/client/inc/clientInt.h
index 27a1c92d92..4fed198ab6 100644
--- a/source/client/inc/clientInt.h
+++ b/source/client/inc/clientInt.h
@@ -61,7 +61,7 @@ typedef struct SAppInstInfo {
 
 typedef struct SAppInfo {
   int64_t        startTime;
-  char           appName[TSDB_APPNAME_LEN];
+  char           appName[TSDB_APP_NAME_LEN];
   char          *ep;
   int32_t        pid;
   int32_t        numOfThreads;
@@ -102,11 +102,23 @@ typedef struct SRequestObj {
   void            *pInfo;   // sql parse info, generated by parser module
 } SRequestObj;
 
+extern int32_t    tscReqRef;
+extern void      *tscQhandle;
+extern int32_t    tscConnRef;
+extern void      *tscRpcCache;
+extern pthread_mutex_t rpcObjMutex;
+
 void* createTscObj(const char* user, const char* auth, const char *ip, uint32_t port);
 void  destroyTscObj(void* pTscObj);
 
+void* createRequest(STscObj* pObj, __taos_async_fn_t fp, void* param, int32_t type);
+void destroyRequest(void* p);
+
 TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass, const char *auth, const char *db, uint16_t port);
 
+void taos_init_imp(void);
+int taos_options_imp(TSDB_OPTION option, const char *pStr);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/client/src/client.c b/source/client/src/client.c
index b1663239e6..8aef77e9e7 100644
--- a/source/client/src/client.c
+++ b/source/client/src/client.c
@@ -13,11 +13,52 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-//#include "taos.h"
+#include "os.h"
+#include "tdef.h"
 
-//TAOS_RES *taos_query(TAOS *taos, const char *sql) {
-//
-//}
+#include "tglobal.h"
+#include "clientInt.h"
+#include "tscLog.h"
+
+TAOS *taos_connect(const char *ip, const char *user, const char *pass, const char *db, uint16_t port) {
+  int32_t p = (port != 0)? port:tsServerPort;
+
+  tscDebug("try to connect to %s:%u, user:%s db:%s", ip, p, user, db);
+  if (user == NULL) {
+    user = TSDB_DEFAULT_USER;
+  }
+
+  if (pass == NULL) {
+    pass = TSDB_DEFAULT_PASS;
+  }
+
+  return taos_connect_internal(ip, user, pass, NULL, db, p);
+}
+
+TAOS *taos_connect_auth(const char *ip, const char *user, const char *auth, const char *db, uint16_t port) {
+  tscDebug("try to connect to %s:%u by auth, user:%s db:%s", ip, port, user, db);
+  if (user == NULL) {
+    user = TSDB_DEFAULT_USER;
+  }
+
+  if (auth == NULL) {
+    tscError("No auth info is given, failed to connect to server");
+    return NULL;
+  }
+
+  return taos_connect_internal(ip, user, NULL, auth, db, port);
+}
+
+TAOS *taos_connect_l(const char *ip, int ipLen, const char *user, int userLen, const char *pass, int passLen, const char *db, int dbLen, uint16_t port) {
+  char ipStr[TSDB_EP_LEN]      = {0};
+  char dbStr[TSDB_DB_NAME_LEN] = {0};
+  char userStr[TSDB_USER_LEN]  = {0};
+  char passStr[TSDB_KEY_LEN]   = {0};
+
+  strncpy(ipStr,   ip,   MIN(TSDB_EP_LEN - 1, ipLen));
+  strncpy(userStr, user, MIN(TSDB_USER_LEN - 1, userLen));
+  strncpy(passStr, pass, MIN(TSDB_KEY_LEN - 1, passLen));
+  strncpy(dbStr,   db,   MIN(TSDB_DB_NAME_LEN - 1, dbLen));
+  return taos_connect(ipStr, userStr, passStr, dbStr, port);
+}
 
-int  taos_init() { return 0; }
-void taos_cleanup(void) {}
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index e3e6e8d3ae..e7940e27b0 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -33,11 +33,9 @@ static bool validateDbName(const char* db) {
   return stringLengthCheck(db, TSDB_DB_NAME_LEN - 1);
 }
 
-static SRequestObj* taosConnectImpl(const char *ip, const char *user, const char *auth, const char *db, uint16_t port, __taos_async_fn_t fp, void *param);
+static STscObj* taosConnectImpl(const char *ip, const char *user, const char *auth, const char *db, uint16_t port, __taos_async_fn_t fp, void *param);
 
 TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass, const char *auth, const char *db, uint16_t port) {
-  STscObj *pObj = NULL;
-
   if (!validateUserName(user)) {
     terrno = TSDB_CODE_TSC_INVALID_USER_LENGTH;
     return NULL;
@@ -81,34 +79,7 @@ TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass,
     }
   }
 
-  SRequestObj *pRequest = taosConnectImpl(ip, user, auth, db, port, NULL, NULL);
-  if (pRequest != NULL) {
-    pObj = pRequest->pTscObj;
-
-    pRequest->body.fp =  NULL;
-    pRequest->body.param = pRequest;
-
-//    tscBuildAndSendRequest(pRequest, NULL);
-    tsem_wait(&pRequest->body.rspSem);
-
-    if (pRequest->code != TSDB_CODE_SUCCESS) {
-      if (pRequest->code == TSDB_CODE_RPC_FQDN_ERROR) {
-        printf("taos connect failed, reason: %s\n\n", taos_errstr(pRequest));
-      } else {
-        printf("taos connect failed, reason: %s.\n\n", tstrerror(terrno));
-      }
-
-      taos_free_result(pRequest);
-      taos_close(pObj);
-      return NULL;
-    }
-
-//    tscDebug("%p DB connection is opening, rpcObj: %p, dnodeConn:%p", pObj, pObj->pRpcObj, pObj->pRpcObj->pDnodeConn);
-    taos_free_result(pRequest);
-    return pObj;
-  }
-
-  return NULL;
+  return taosConnectImpl(ip, user, auth, db, port, NULL, NULL);
 }
 
 int initEpSetFromCfg(const char *firstEp, const char *secondEp, SRpcCorEpSet *pEpSet) {
@@ -147,7 +118,7 @@ int initEpSetFromCfg(const char *firstEp, const char *secondEp, SRpcCorEpSet *pE
   return 0;
 }
 
-SRequestObj* taosConnectImpl(const char *ip, const char *user, const char *auth, const char *db, uint16_t port, __taos_async_fn_t fp, void *param) {
+STscObj* taosConnectImpl(const char *ip, const char *user, const char *auth, const char *db, uint16_t port, __taos_async_fn_t fp, void *param) {
   if (taos_init() != TSDB_CODE_SUCCESS) {
     return NULL;
   }
@@ -155,36 +126,40 @@ SRequestObj* taosConnectImpl(const char *ip, const char *user, const char *auth,
   STscObj *pObj = createTscObj(user, auth, ip, port);
   if (NULL == pObj) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    return NULL;
+    return pObj;
   }
 
-  SRequestObj *pRequest = (SRequestObj *)calloc(1, sizeof(SRequestObj));
-  if (NULL == pRequest) {
+  //  void *pRpcObj = NULL;
+  //
+  //  char rpcKey[512] = {0};
+  //  snprintf(rpcKey, sizeof(rpcKey), "%s:%s:%s:%d", user, auth, ip, port);
+  //  if (tscAcquireRpc(rpcKey, user, auth, &pRpcObj) != 0) {
+  //    terrno = TSDB_CODE_RPC_NETWORK_UNAVAIL;
+  //    return NULL;
+  //  }
+
+  SRequestObj *pRequest = createRequest(pObj, fp, param, TSDB_SQL_CONNECT);
+  if (pRequest == NULL) {
+    destroyTscObj(pObj);
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    free(pObj);
+  }
+
+  //    tscBuildAndSendRequest(pRequest, NULL);
+  //    tsem_wait(&pRequest->body.rspSem);
+  if (pRequest->code != TSDB_CODE_SUCCESS) {
+    const char *errorMsg = (pRequest->code == TSDB_CODE_RPC_FQDN_ERROR)
+                               ? taos_errstr(pRequest)
+                               : tstrerror(terrno);
+
+    printf("connect failed, reason: %s\n\n", errorMsg);
+
+    taos_free_result(pRequest);
+    taos_close(pObj);
     return NULL;
   }
 
-  void *pRpcObj = NULL;
-
-  char rpcKey[512] = {0};
-  snprintf(rpcKey, sizeof(rpcKey), "%s:%s:%s:%d", user, auth, ip, port);
-  if (tscAcquireRpc(rpcKey, user, auth, &pRpcObj) != 0) {
-    terrno = TSDB_CODE_RPC_NETWORK_UNAVAIL;
-    return NULL;
-  }
-
-  pObj->pRpcObj = (SRpcObj *)pRpcObj;
-
-  pRequest->pTscObj = pObj;
-  pRequest->body.fp = fp;
-  pRequest->body.param = param;
-  pRequest->type  = TSDB_SQL_CONNECT;
-
-  tsem_init(&pRequest->body.rspSem, 0, 0);
-
-  pObj->id = taosAddRef(tscConn, pObj);
-  registerSqlObj(pRequest);
-
-  return pRequest;
+//  tscDebug("0x%"PRIx64" connection is opening, rpcObj: %p, dnodeConn:%p", pObj, pObj->pRpcObj,
+//      pObj->pRpcObj->pDnodeConn);
+  destroyRequest(pRequest);
+  return pObj;
 }
\ No newline at end of file
diff --git a/source/client/src/tscEnv.c b/source/client/src/tscEnv.c
index d77d8b1bec..26ae9a8006 100644
--- a/source/client/src/tscEnv.c
+++ b/source/client/src/tscEnv.c
@@ -31,14 +31,12 @@
 #define TSC_VAR_RELEASED    0
 
 SAppInfo   appInfo;
-int32_t    sentinel = TSC_VAR_NOT_RELEASE;
-
 int32_t    tscReqRef = -1;
 void      *tscQhandle;
 int32_t    tscConnRef = -1;
 void      *tscRpcCache;            // TODO removed from here.
 
-static pthread_mutex_t rpcObjMutex; // mutex to protect open the rpc obj concurrently
+pthread_mutex_t rpcObjMutex; // mutex to protect open the rpc obj concurrently
 static pthread_once_t  tscinit = PTHREAD_ONCE_INIT;
 static pthread_mutex_t setConfMutex = PTHREAD_MUTEX_INITIALIZER;
 
@@ -104,7 +102,6 @@ void* tscAcquireRpc(const char *key, const char *user, const char *secretEncrypt
   pthread_mutex_unlock(&rpcObjMutex);
   return pRpcObj;
 #endif
-
 }
 
 void destroyTscObj(void *pTscObj) {
@@ -139,6 +136,72 @@ void* createTscObj(const char* user, const char* auth, const char *ip, uint32_t
   tstrncpy(pObj->pass, auth, len);
 
   pthread_mutex_init(&pObj->mutex, NULL);
+  pObj->id = taosAddRef(tscConnRef, pObj);
+}
+
+static void registerRequest(SRequestObj* pRequest) {
+  STscObj*pTscObj = (STscObj*) taosAcquireRef(tscConnRef, pRequest->pTscObj->id);
+  assert(pTscObj != NULL);
+
+  // connection has been released already, abort creating request.
+  pRequest->self = taosAddRef(tscReqRef, pRequest);
+
+  int32_t num   = atomic_add_fetch_32(&pTscObj->numOfReqs, 1);
+
+  SInstanceActivity* pActivity = &pTscObj->pAppInfo->summary;
+  int32_t total       = atomic_add_fetch_32(&pActivity->totalRequests, 1);
+  int32_t currentInst = atomic_add_fetch_32(&pActivity->currentRequests, 1);
+
+  tscDebug("0x%"PRIx64" new Request from 0x%"PRIx64", current:%d, app current:%d, total:%d", pRequest->self, pRequest->pTscObj->id, num, currentInst, total);
+}
+
+void* createRequest(STscObj* pObj, __taos_async_fn_t fp, void* param, int32_t type) {
+  assert(pObj != NULL);
+
+  SRequestObj *pRequest = (SRequestObj *)calloc(1, sizeof(SRequestObj));
+  if (NULL == pRequest) {
+    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
+    return NULL;
+  }
+
+  // TODO generated request uuid
+  pRequest->requestId  = 0;
+
+  pRequest->type       = type;
+  pRequest->pTscObj    = pObj;
+  pRequest->body.fp    = fp;
+  pRequest->body.param = param;
+  tsem_init(&pRequest->body.rspSem, 0, 0);
+
+  registerRequest(pRequest);
+}
+
+static void deregisterRequest(SRequestObj* pRequest) {
+  assert(pRequest != NULL);
+
+  STscObj* pTscObj = pRequest->pTscObj;
+  SInstanceActivity* pActivity = &pTscObj->pAppInfo->summary;
+
+  taosReleaseRef(tscReqRef, pRequest->self);
+
+  int32_t currentInst = atomic_sub_fetch_32(&pActivity->currentRequests, 1);
+  int32_t num   = atomic_sub_fetch_32(&pTscObj->numOfReqs, 1);
+
+  tscDebug("0x%"PRIx64" free Request from 0x%"PRIx64", current:%d, app current:%d", pRequest->self, pTscObj->id, num, currentInst);
+  taosReleaseRef(tscConnRef, pTscObj->id);
+}
+
+void destroyRequest(void* p) {
+  assert(p != NULL);
+  SRequestObj* pRequest = *(SRequestObj**)p;
+
+  assert(RID_VALID(pRequest->self));
+
+  tfree(pRequest->msgBuf);
+  tfree(pRequest->sqlstr);
+  tfree(pRequest->pInfo);
+
+  deregisterRequest(pRequest);
 }
 
 static void tscInitLogFile() {
@@ -167,11 +230,10 @@ void taos_init_imp(void) {
 
   deltaToUtcInitOnce();
   taosInitGlobalCfg();
-  taosReadGlobalCfg();
+  taosReadCfgFromFile();
 
   tscInitLogFile();
-
-  if (taosCheckGlobalCfg()) {
+  if (taosCheckAndPrintCfg()) {
     tscInitRes = -1;
     return;
   }
@@ -179,8 +241,7 @@ void taos_init_imp(void) {
   taosInitNotes();
   rpcInit();
 
-  tscDebug("starting to initialize TAOS client ...");
-  tscDebug("Local End Point is:%s", tsLocalEp);
+  tscDebug("starting to initialize TAOS client ...\nLocal End Point is:%s", tsLocalEp);
 
   taosSetCoreDump(true);
 
@@ -202,55 +263,16 @@ void taos_init_imp(void) {
   pthread_mutex_init(&rpcObjMutex, NULL);
 
   tscConnRef = taosOpenRef(200, destroyTscObj);
-  tscReqRef  = taosOpenRef(40960, tscFreeRegisteredSqlObj);
+  tscReqRef  = taosOpenRef(40960, destroyRequest);
 
-  taosGetCurrentAPPName(appInfo.appName, NULL);
+  taosGetAppName(appInfo.appName, NULL);
   appInfo.pid = taosGetPId();
   appInfo.startTime = taosGetTimestampMs();
 
   tscDebug("client is initialized successfully");
 }
 
-int taos_init() {
-  pthread_once(&tscinit, taos_init_imp);
-  return tscInitRes;
-}
-
-// this function may be called by user or system, or by both simultaneously.
-void taos_cleanup(void) {
-  tscDebug("start to cleanup client environment");
-
-  if (atomic_val_compare_exchange_32(&sentinel, TSC_VAR_NOT_RELEASE, TSC_VAR_RELEASED) != TSC_VAR_NOT_RELEASE) {
-    return;
-  }
-
-  int32_t id = tscReqRef;
-  tscReqRef = -1;
-  taosCloseRef(id);
-
-  void* p = tscQhandle;
-  tscQhandle = NULL;
-  taosCleanUpScheduler(p);
-
-  id = tscConnRef;
-  tscConnRef = -1;
-  taosCloseRef(id);
-
-  p = tscRpcCache;
-  tscRpcCache = NULL;
-
-  if (p != NULL) {
-    taosCacheCleanup(p);
-    pthread_mutex_destroy(&rpcObjMutex);
-  }
-
-  pthread_mutex_destroy(&setConfMutex);
-
-  rpcCleanup();
-  taosCloseLog();
-}
-
-static int taos_options_imp(TSDB_OPTION option, const char *pStr) {
+int taos_options_imp(TSDB_OPTION option, const char *pStr) {
   SGlobalCfg *cfg = NULL;
 
   switch (option) {
@@ -405,22 +427,6 @@ static int taos_options_imp(TSDB_OPTION option, const char *pStr) {
   return 0;
 }
 
-int taos_options(TSDB_OPTION option, const void *arg, ...) {
-  static int32_t lock = 0;
-
-  for (int i = 1; atomic_val_compare_exchange_32(&lock, 0, 1) != 0; ++i) {
-    if (i % 1000 == 0) {
-      tscInfo("haven't acquire lock after spin %d times.", i);
-      sched_yield();
-    }
-  }
-
-  int ret = taos_options_imp(option, (const char*)arg);
-
-  atomic_store_32(&lock, 0);
-  return ret;
-}
-
 #if 0
 #include "cJSON.h"
 static setConfRet taos_set_config_imp(const char *config){
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index e69de29bb2..4f848a0750 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gtest/gtest.h>
+#include <iostream>
+#include "tglobal.h"
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wsign-compare"
+
+#include "taos.h"
+
+namespace {
+}  // namespace
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+TEST(testCase, driverInit_Test) {
+  taos_init();
+}
\ No newline at end of file
diff --git a/source/common/src/tep.c b/source/common/src/tep.c
index 7dda5f5f6f..3f500faf89 100644
--- a/source/common/src/tep.c
+++ b/source/common/src/tep.c
@@ -1,4 +1,6 @@
-
+#include "os.h"
+#include "tep.h"
+#include "tglobal.h"
 
 int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
   *port = 0;
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index a2cbdbff4a..2e68fb2742 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -25,6 +25,7 @@
 #include "tutil.h"
 #include "ttimezone.h"
 #include "tlocale.h"
+#include "tep.h"
 
 // cluster
 char     tsFirst[TSDB_EP_LEN] = {0};
@@ -325,7 +326,7 @@ int32_t taosCfgDynamicOptions(char *msg) {
 
   if (strncasecmp(option, "resetlog", 8) == 0) {
     taosResetLog();
-    taosPrintGlobalCfg();
+    taosPrintCfg();
     return 0;
   }
 
@@ -389,7 +390,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_EP_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "secondEp";
   cfg.ptr = tsSecond;
@@ -399,7 +400,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_EP_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "fqdn";
   cfg.ptr = tsLocalFqdn;
@@ -409,7 +410,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_FQDN_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // port
   cfg.option = "serverPort";
@@ -420,7 +421,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 65056;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // directory
   cfg.option = "configDir";
@@ -431,7 +432,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_FILENAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "logDir";
   cfg.ptr = tsLogDir;
@@ -441,7 +442,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_FILENAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "scriptDir";
   cfg.ptr = tsScriptDir;
@@ -451,7 +452,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_FILENAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "dataDir";
   cfg.ptr = tsDataDir;
@@ -461,7 +462,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_FILENAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "arbitrator";
   cfg.ptr = tsArbitrator;
@@ -471,7 +472,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_EP_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // dnode configs
   cfg.option = "numOfThreadsPerCore";
@@ -482,7 +483,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "numOfCommitThreads";
   cfg.ptr = &tsNumOfCommitThreads;
@@ -492,7 +493,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 100;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "ratioOfQueryCores";
   cfg.ptr = &tsRatioOfQueryCores;
@@ -502,7 +503,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 2.0f;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxNumOfDistinctRes";
   cfg.ptr = &tsMaxNumOfDistinctResults;
@@ -512,7 +513,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10000*10000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
   
   cfg.option = "numOfMnodes";
   cfg.ptr = &tsNumOfMnodes;
@@ -522,7 +523,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 3;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "vnodeBak";
   cfg.ptr = &tsEnableVnodeBak;
@@ -532,7 +533,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "telemetryReporting";
   cfg.ptr = &tsEnableTelemetryReporting;
@@ -542,7 +543,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "balance";
   cfg.ptr = &tsEnableBalance;
@@ -552,7 +553,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "balanceInterval";
   cfg.ptr = &tsBalanceInterval;
@@ -562,7 +563,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 30000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // 0-any; 1-mnode; 2-vnode
   cfg.option = "role";
@@ -573,7 +574,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 2;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // timer
   cfg.option = "maxTmrCtrl";
@@ -584,7 +585,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 2048;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "monitorInterval";
   cfg.ptr = &tsMonitorInterval;
@@ -594,7 +595,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 600;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "offlineThreshold";
   cfg.ptr = &tsOfflineThreshold;
@@ -604,7 +605,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 86400 * 365;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "rpcTimer";
   cfg.ptr = &tsRpcTimer;
@@ -614,7 +615,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 3000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "rpcForceTcp";
   cfg.ptr = &tsRpcForceTcp;
@@ -624,7 +625,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "rpcMaxTime";
   cfg.ptr = &tsRpcMaxTime;
@@ -634,7 +635,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 7200;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "statusInterval";
   cfg.ptr = &tsStatusInterval;
@@ -644,7 +645,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "shellActivityTimer";
   cfg.ptr = &tsShellActivityTimer;
@@ -654,7 +655,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 120;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_SECOND;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minSlidingTime";
   cfg.ptr = &tsMinSlidingTime;
@@ -664,7 +665,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minIntervalTime";
   cfg.ptr = &tsMinIntervalTime;
@@ -674,7 +675,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxStreamCompDelay";
   cfg.ptr = &tsMaxStreamComputDelay;
@@ -684,7 +685,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1000000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxFirstStreamCompDelay";
   cfg.ptr = &tsStreamCompStartDelay;
@@ -694,7 +695,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1000000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "retryStreamCompDelay";
   cfg.ptr = &tsRetryStreamCompDelay;
@@ -705,7 +706,7 @@ static void doInitGlobalConfig(void) {
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MS;
 
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
   cfg.option = "streamCompDelayRatio";
   cfg.ptr = &tsStreamComputDelayRatio;
   cfg.valType = TAOS_CFG_VTYPE_FLOAT;
@@ -714,7 +715,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0.9f;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxVgroupsPerDb";
   cfg.ptr = &tsMaxVgroupsPerDb;
@@ -724,7 +725,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 8192;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // database configs
   cfg.option = "maxTablesPerVnode";
@@ -735,7 +736,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_TABLES;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minTablesPerVnode";
   cfg.ptr = &tsMinTablePerVnode;
@@ -745,7 +746,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_TABLES;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "tableIncStepPerVnode";
   cfg.ptr = &tsTableIncStepPerVnode;
@@ -755,7 +756,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_TABLES;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "cache";
   cfg.ptr = &tsCacheBlockSize;
@@ -765,7 +766,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_CACHE_BLOCK_SIZE;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_MB;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "blocks";
   cfg.ptr = &tsBlocksPerVnode;
@@ -775,7 +776,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_TOTAL_BLOCKS;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "days";
   cfg.ptr = &tsDaysPerFile;
@@ -785,7 +786,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DAYS_PER_FILE;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "keep";
   cfg.ptr = &tsDaysToKeep;
@@ -795,7 +796,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_KEEP;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minRows";
   cfg.ptr = &tsMinRowsInFileBlock;
@@ -805,7 +806,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_MIN_ROW_FBLOCK;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxRows";
   cfg.ptr = &tsMaxRowsInFileBlock;
@@ -815,7 +816,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_MAX_ROW_FBLOCK;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "precision";
   cfg.ptr = &tsTimePrecision;
@@ -825,7 +826,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_PRECISION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "comp";
   cfg.ptr = &tsCompression;
@@ -835,7 +836,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_COMP_LEVEL;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "walLevel";
   cfg.ptr = &tsWAL;
@@ -845,7 +846,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_WAL_LEVEL;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "fsync";
   cfg.ptr = &tsFsyncPeriod;
@@ -855,7 +856,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_FSYNC_PERIOD;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "replica";
   cfg.ptr = &tsReplications;
@@ -865,7 +866,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DB_REPLICA_OPTION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "partitions";
   cfg.ptr = &tsPartitons;
@@ -875,7 +876,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DB_PARTITON_OPTION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "quorum";
   cfg.ptr = &tsQuorum;
@@ -885,7 +886,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DB_QUORUM_OPTION;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "update";
   cfg.ptr = &tsUpdate;
@@ -895,7 +896,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DB_UPDATE;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "cachelast";
   cfg.ptr = &tsCacheLastRow;
@@ -905,7 +906,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_DB_CACHE_LAST_ROW;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mqttHostName";
   cfg.ptr = tsMqttHostName;
@@ -915,7 +916,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_MQTT_HOSTNAME_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mqttPort";
   cfg.ptr = tsMqttPort;
@@ -925,7 +926,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_MQTT_PORT_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mqttTopic";
   cfg.ptr = tsMqttTopic;
@@ -935,7 +936,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_MQTT_TOPIC_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "compressMsgSize";
   cfg.ptr = &tsCompressMsgSize;
@@ -945,7 +946,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 100000000.0f;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "compressColData";
   cfg.ptr = &tsCompressColData;
@@ -955,7 +956,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 100000000.0f;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxSQLLength";
   cfg.ptr = &tsMaxSQLStringLen;
@@ -965,7 +966,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_ALLOWED_SQL_LEN;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxWildCardsLength";
   cfg.ptr = &tsMaxWildCardsLen;
@@ -975,7 +976,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_FIELD_LEN;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxRegexStringLen";
   cfg.ptr = &tsMaxRegexStringLen;
@@ -985,7 +986,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_FIELD_LEN;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxNumOfOrderedRes";
   cfg.ptr = &tsMaxNumOfOrderedResults;
@@ -995,7 +996,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = TSDB_MAX_ALLOWED_SQL_LEN;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "queryBufferSize";
   cfg.ptr = &tsQueryBufferSize;
@@ -1005,7 +1006,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 500000000000.0f;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "retrieveBlockingModel";
   cfg.ptr = &tsRetrieveBlockingModel;
@@ -1015,7 +1016,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "keepColumnName";
   cfg.ptr = &tsKeepOriginalColumnName;
@@ -1025,7 +1026,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // locale & charset
   cfg.option = "timezone";
@@ -1036,7 +1037,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_TIMEZONE_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "locale";
   cfg.ptr = tsLocale;
@@ -1046,7 +1047,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_LOCALE_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "charset";
   cfg.ptr = tsCharset;
@@ -1056,7 +1057,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = TSDB_LOCALE_LEN;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // connect configs
   cfg.option = "maxShellConns";
@@ -1067,7 +1068,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 50000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxConnections";
   cfg.ptr = &tsMaxConnections;
@@ -1077,7 +1078,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 100000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minimalLogDirGB";
   cfg.ptr = &tsMinimalLogDirGB;
@@ -1087,7 +1088,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_GB;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minimalTmpDirGB";
   cfg.ptr = &tsReservedTmpDirectorySpace;
@@ -1097,7 +1098,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_GB;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "minimalDataDirGB";
   cfg.ptr = &tsMinimalDataDirGB;
@@ -1107,7 +1108,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_GB;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // module configs
   cfg.option = "mnodeEqualVnodeNum";
@@ -1118,7 +1119,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
     // module configs
   cfg.option = "flowctrl";
@@ -1129,7 +1130,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "slaveQuery";
   cfg.ptr = &tsEnableSlaveQuery;
@@ -1139,7 +1140,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "adjustMaster";
   cfg.ptr = &tsEnableAdjustMaster;
@@ -1149,7 +1150,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mqtt";
   cfg.ptr = &tsEnableMqttModule;
@@ -1159,7 +1160,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "monitor";
   cfg.ptr = &tsEnableMonitorModule;
@@ -1169,7 +1170,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "stream";
   cfg.ptr = &tsEnableStream;
@@ -1179,7 +1180,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "topicBianryLen";
   cfg.ptr = &tsTopicBianryLen;
@@ -1189,7 +1190,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 16000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "telegrafUseFieldNum";
   cfg.ptr = &tsTelegrafUseFieldNum;
@@ -1199,7 +1200,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "restfulRowLimit";
   cfg.ptr = &tsRestRowLimit;
@@ -1209,7 +1210,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 10000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // debug flag
   cfg.option = "numOfLogLines";
@@ -1220,7 +1221,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 2000000000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "logKeepDays";
   cfg.ptr = &tsLogKeepDays;
@@ -1230,7 +1231,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 365000;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "asyncLog";
   cfg.ptr = &tsAsyncLog;
@@ -1240,7 +1241,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "debugFlag";
   cfg.ptr = &debugFlag;
@@ -1250,7 +1251,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mDebugFlag";
   cfg.ptr = &mDebugFlag;
@@ -1260,7 +1261,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "dDebugFlag";
   cfg.ptr = &dDebugFlag;
@@ -1270,7 +1271,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "sDebugFlag";
   cfg.ptr = &sDebugFlag;
@@ -1280,7 +1281,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "wDebugFlag";
   cfg.ptr = &wDebugFlag;
@@ -1290,7 +1291,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
 
   cfg.option = "sdbDebugFlag";
@@ -1301,7 +1302,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "rpcDebugFlag";
   cfg.ptr = &rpcDebugFlag;
@@ -1311,7 +1312,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "tmrDebugFlag";
   cfg.ptr = &tmrDebugFlag;
@@ -1321,7 +1322,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "cDebugFlag";
   cfg.ptr = &cDebugFlag;
@@ -1331,7 +1332,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "jniDebugFlag";
   cfg.ptr = &jniDebugFlag;
@@ -1341,7 +1342,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "odbcDebugFlag";
   cfg.ptr = &odbcDebugFlag;
@@ -1351,7 +1352,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "uDebugFlag";
   cfg.ptr = &uDebugFlag;
@@ -1361,7 +1362,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "httpDebugFlag";
   cfg.ptr = &httpDebugFlag;
@@ -1371,7 +1372,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "mqttDebugFlag";
   cfg.ptr = &mqttDebugFlag;
@@ -1381,7 +1382,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "monDebugFlag";
   cfg.ptr = &monDebugFlag;
@@ -1391,7 +1392,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "qDebugFlag";
   cfg.ptr = &qDebugFlag;
@@ -1401,7 +1402,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "vDebugFlag";
   cfg.ptr = &vDebugFlag;
@@ -1411,7 +1412,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "tsdbDebugFlag";
   cfg.ptr = &tsdbDebugFlag;
@@ -1421,7 +1422,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "cqDebugFlag";
   cfg.ptr = &cqDebugFlag;
@@ -1431,7 +1432,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 255;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "enableRecordSql";
   cfg.ptr = &tsTscEnableRecordSql;
@@ -1441,7 +1442,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "enableCoreFile";
   cfg.ptr = &tsEnableCoreFile;
@@ -1451,7 +1452,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   // version info
   cfg.option = "gitinfo";
@@ -1462,7 +1463,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "gitinfoOfInternal";
   cfg.ptr = gitinfoOfInternal;
@@ -1472,7 +1473,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "buildinfo";
   cfg.ptr = buildinfo;
@@ -1482,7 +1483,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "version";
   cfg.ptr = version;
@@ -1492,7 +1493,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxBinaryDisplayWidth";
   cfg.ptr = &tsMaxBinaryDisplayWidth;
@@ -1502,7 +1503,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 65536;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "tempDir";
   cfg.ptr = tsTempDir;
@@ -1512,7 +1513,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = PATH_MAX;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "tsdbMetaCompactRatio";
   cfg.ptr = &tsTsdbMetaCompactRatio;
@@ -1522,7 +1523,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 100;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
    // enable kill long query
   cfg.option = "deadLockKillQuery";
@@ -1533,7 +1534,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 1;
   cfg.ptrLength = 1;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
 #ifdef TD_TSZ
   // lossy compress
@@ -1545,7 +1546,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 0;
   cfg.ptrLength = tListLen(lossyColumns);
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "fPrecision";
   cfg.ptr = &fPrecision;
@@ -1557,7 +1558,7 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
 
   
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "dPrecision";
   cfg.ptr = &dPrecision;
@@ -1567,7 +1568,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = MAX_FLOAT;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "maxRange";
   cfg.ptr = &maxRange;
@@ -1577,7 +1578,7 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 65536;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
 
   cfg.option = "range";
   cfg.ptr = &curRange;
@@ -1587,10 +1588,10 @@ static void doInitGlobalConfig(void) {
   cfg.maxValue = 65536;
   cfg.ptrLength = 0;
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
+  taosAddConfigOption(cfg);
   assert(tsGlobalConfigNum == TSDB_CFG_MAX_NUM);
 #else
-  assert(tsGlobalConfigNum == TSDB_CFG_MAX_NUM - 5);
+  assert(tsGlobalConfigNum == (TSDB_CFG_MAX_NUM - 5));
 #endif
 
 }
@@ -1599,7 +1600,7 @@ void taosInitGlobalCfg() {
   pthread_once(&tsInitGlobalCfgOnce, doInitGlobalConfig);
 }
 
-int32_t taosCheckGlobalCfg() {
+int32_t taosCheckAndPrintCfg() {
   char fqdn[TSDB_FQDN_LEN];
   uint16_t port;
 
@@ -1653,30 +1654,13 @@ int32_t taosCheckGlobalCfg() {
     tsMaxTablePerVnode = tsMinTablePerVnode;
   }
 
-  // todo refactor
-  tsVersion = 0;
-  for (int ver = 0, i = 0; i < TSDB_VERSION_LEN; ++i) {
-    if (version[i] >= '0' && version[i] <= '9') {
-      ver = ver * 10 + (version[i] - '0');
-    } else if (version[i] == '.') {
-      tsVersion |= ver & 0xFF;
-      tsVersion <<= 8;
-
-      ver = 0;
-    } else if (version[i] == 0) {
-      tsVersion |= ver & 0xFF;
-
-      break;
-    }
-  }
-
   if (tsQueryBufferSize >= 0) {
     tsQueryBufferSizeBytes = tsQueryBufferSize * 1048576UL;
   }
 
   uInfo("   check global cfg completed");
   uInfo("==================================");
-  taosPrintGlobalCfg();
+  taosPrintCfg();
 
   return 0;
 }
diff --git a/source/dnode/mgmt/daemon/src/daemon.c b/source/dnode/mgmt/daemon/src/daemon.c
index cf9a960062..32a5380ff8 100644
--- a/source/dnode/mgmt/daemon/src/daemon.c
+++ b/source/dnode/mgmt/daemon/src/daemon.c
@@ -117,7 +117,7 @@ int dmnReadConfig(const char *path) {
     return -1;
   }
 
-  if (taosCheckGlobalCfg() != 0) {
+  if (taosCheckAndPrintCfg() != 0) {
     uError("failed to check global config");
     return -1;
   }
diff --git a/source/os/src/osSemaphore.c b/source/os/src/osSemaphore.c
index 2385d10285..0d7066b5c8 100644
--- a/source/os/src/osSemaphore.c
+++ b/source/os/src/osSemaphore.c
@@ -42,7 +42,7 @@ bool taosComparePthread(pthread_t first, pthread_t second) { return first.p == s
 
 int32_t taosGetPId() { return GetCurrentProcessId(); }
 
-int32_t taosGetCurrentAPPName(char* name, int32_t* len) {
+int32_t taosGetAppName(char* name, int32_t* len) {
   char filepath[1024] = {0};
 
   GetModuleFileName(NULL, filepath, MAX_PATH);
@@ -358,7 +358,7 @@ bool taosComparePthread(pthread_t first, pthread_t second) { return pthread_equa
 
 int32_t taosGetPId() { return (int32_t)getpid(); }
 
-int32_t taosGetCurrentAPPName(char *name, int32_t *len) {
+int32_t taosGetAppName(char *name, int32_t *len) {
   char buf[PATH_MAX + 1];
   buf[0] = '\0';
   proc_name(getpid(), buf, sizeof(buf) - 1);
@@ -392,7 +392,7 @@ void    taosResetPthread(pthread_t* thread) { *thread = 0; }
 bool    taosComparePthread(pthread_t first, pthread_t second) { return first == second; }
 int32_t taosGetPId() { return getpid(); }
 
-int32_t taosGetCurrentAPPName(char* name, int32_t* len) {
+int32_t taosGetAppName(char* name, int32_t* len) {
   const char* self = "/proc/self/exe";
   char        path[PATH_MAX] = {0};
 
diff --git a/source/os/src/osSysinfo.c b/source/os/src/osSysinfo.c
index ca817c4c1e..f892b4d8c0 100644
--- a/source/os/src/osSysinfo.c
+++ b/source/os/src/osSysinfo.c
@@ -714,7 +714,7 @@ static void taosGetSystemLocale() {  // get and set default locale
     //printf("locale not configured, set to system default:%s", tsLocale);
   }
 
-  /* if user does not specify the charset, extract it from locale */
+  // if user does not specify the charset, extract it from locale
   char *str = strrchr(tsLocale, sep);
   if (str != NULL) {
     str++;
@@ -1118,13 +1118,13 @@ char *taosGetCmdlineByPID(int pid) {
 SysNameInfo taosGetSysNameInfo() {
   SysNameInfo info = {0};
 
-  struct utsname buf;
-  if (!uname(&buf)) {
-    info.sysname = buf.sysname;
-    info.sysname == buf.nodename;
-    info.sysname = buf.release;
-    info.sysname = buf.version;
-    info.sysname = buf.machine;
+  struct utsname uts;
+  if (!uname(&uts)) {
+    info.sysname = strdup(uts.sysname);
+    info.nodename = strdup(uts.nodename);
+    info.release = strdup(uts.release);
+    info.version = strdup(uts.version);
+    info.machine = strdup(uts.machine);
   }
 
   return info;
diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index 8a6f389366..726247d450 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -282,7 +282,7 @@ static void taosReadConfigOption(const char *option, char *value, char *value2,
   }
 }
 
-void taosInitConfigOption(SGlobalCfg cfg) {
+void taosAddConfigOption(SGlobalCfg cfg) {
   tsGlobalConfig[tsGlobalConfigNum++] = cfg;
 }
 
@@ -335,7 +335,7 @@ void taosReadGlobalLogCfg() {
   fclose(fp);
 }
 
-int32_t taosReadGlobalCfg() {
+int32_t taosReadCfgFromFile() {
   char * line, *option, *value, *value2, *value3;
   int    olen, vlen, vlen2, vlen3;
   char   fileName[PATH_MAX] = {0};
@@ -396,7 +396,7 @@ int32_t taosReadGlobalCfg() {
   return 0;
 }
 
-void taosPrintGlobalCfg() {
+void taosPrintCfg() {
   uInfo("   taos config & system info:");
   uInfo("==================================");
 
@@ -443,7 +443,6 @@ void taosPrintGlobalCfg() {
   }
 
   taosPrintOsInfo();
-  // taosPrintDataDirCfg();
   uInfo("==================================");
 }
 
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index e6cc3a53af..24293fe9d3 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -112,7 +112,7 @@ static int32_t   taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen
 static SLogBuff *taosLogBuffNew(int32_t bufSize);
 static void      taosCloseLogByFd(int32_t oldFd);
 static int32_t   taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum);
-extern void      taosPrintGlobalCfg();
+extern void      taosPrintCfg();
 static int32_t   taosCompressFile(char *srcFileName, char *destFileName);
 
 static int32_t taosStartLog() {
@@ -222,7 +222,7 @@ static void *taosThreadToOpenNewFile(void *param) {
   
   uInfo("   new log file:%d is opened", tsLogObj.flag);
   uInfo("==================================");
-  taosPrintGlobalCfg();
+  taosPrintCfg();
   taosKeepOldLog(keepName);
 
   return NULL;
diff --git a/source/util/src/ttimer.c b/source/util/src/ttimer.c
index 56186d9b24..1fdc2257d7 100644
--- a/source/util/src/ttimer.c
+++ b/source/util/src/ttimer.c
@@ -20,12 +20,10 @@
 #include "tutil.h"
 #include "taoserror.h"
 
-extern int8_t tscEmbedded;
-
-#define tmrFatal(...) { if (tmrDebugFlag & DEBUG_FATAL) { taosPrintLog("TMR FATAL ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrError(...) { if (tmrDebugFlag & DEBUG_ERROR) { taosPrintLog("TMR ERROR ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrWarn(...)  { if (tmrDebugFlag & DEBUG_WARN)  { taosPrintLog("TMR WARN ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
-#define tmrInfo(...)  { if (tmrDebugFlag & DEBUG_INFO)  { taosPrintLog("TMR ", tscEmbedded ? 255 : tmrDebugFlag, __VA_ARGS__); }}
+#define tmrFatal(...) { if (tmrDebugFlag & DEBUG_FATAL) { taosPrintLog("TMR FATAL ", tmrDebugFlag, __VA_ARGS__); }}
+#define tmrError(...) { if (tmrDebugFlag & DEBUG_ERROR) { taosPrintLog("TMR ERROR ", tmrDebugFlag, __VA_ARGS__); }}
+#define tmrWarn(...)  { if (tmrDebugFlag & DEBUG_WARN)  { taosPrintLog("TMR WARN ", tmrDebugFlag, __VA_ARGS__); }}
+#define tmrInfo(...)  { if (tmrDebugFlag & DEBUG_INFO)  { taosPrintLog("TMR ", tmrDebugFlag, __VA_ARGS__); }}
 #define tmrDebug(...) { if (tmrDebugFlag & DEBUG_DEBUG) { taosPrintLog("TMR ", tmrDebugFlag, __VA_ARGS__); }}
 #define tmrTrace(...) { if (tmrDebugFlag & DEBUG_TRACE) { taosPrintLog("TMR ", tmrDebugFlag, __VA_ARGS__); }}