diff --git a/include/dnode/mgmt/dnode.h b/include/dnode/mgmt/dnode.h
index 2e3863c3a190db25c5461a0a2afcdb13dac24028..3f1277a2f945ffa100f2c8fe28cb2ae8724801fd 100644
--- a/include/dnode/mgmt/dnode.h
+++ b/include/dnode/mgmt/dnode.h
@@ -22,15 +22,39 @@
 extern "C" {
 #endif
 
-/* ------------------------ TYPES EXPOSED ------------------------ */
+/* ------------------------ TYPES EXPOSED ---------------- */
 typedef struct SDnode SDnode;
 
+/* ------------------------ Environment ------------------ */
+typedef struct {
+  int32_t sver;
+  int32_t numOfCores;
+  int8_t  enableTelem;
+  char    timezone[TSDB_TIMEZONE_LEN];
+  char    locale[TSDB_LOCALE_LEN];
+  char    charset[TSDB_LOCALE_LEN];
+  char    buildinfo[64];
+  char    gitinfo[48];
+} SDnodeEnvCfg;
+
+/**
+ * @brief Initialize the environment
+ *
+ * @param pOption Option of the environment
+ * @return int32_t 0 for success and -1 for failure
+ */
+int32_t dndInit(const SDnodeEnvCfg *pCfg);
+
+/**
+ * @brief clear the environment
+ *
+ */
+void dndCleanup();
+
+/* ------------------------ SDnode ----------------------- */
 typedef struct {
-  int32_t  sver;
-  int32_t  numOfCores;
-  int32_t  numOfSupportVnodes;
   int16_t  numOfCommitThreads;
-  int8_t   enableTelem;
+  int32_t  numOfSupportVnodes;
   int32_t  statusInterval;
   float    numOfThreadsPerCore;
   float    ratioOfQueryCores;
@@ -41,28 +65,22 @@ typedef struct {
   char     localEp[TSDB_EP_LEN];
   char     localFqdn[TSDB_FQDN_LEN];
   char     firstEp[TSDB_EP_LEN];
-  char     timezone[TSDB_TIMEZONE_LEN];
-  char     locale[TSDB_LOCALE_LEN];
-  char     charset[TSDB_LOCALE_LEN];
-  char     buildinfo[64];
-  char     gitinfo[48];
-} SDnodeOpt;
+} SDnodeObjCfg;
 
-/* ------------------------ SDnode ------------------------ */
 /**
  * @brief Initialize and start the dnode.
  *
- * @param pOption Option of the dnode.
+ * @param pCfg Config of the dnode.
  * @return SDnode* The dnode object.
  */
-SDnode *dndInit(SDnodeOpt *pOption);
+SDnode *dndCreate(SDnodeObjCfg *pCfg);
 
 /**
  * @brief Stop and cleanup the dnode.
  *
  * @param pDnode The dnode object to close.
  */
-void dndCleanup(SDnode *pDnode);
+void dndClose(SDnode *pDnode);
 
 #ifdef __cplusplus
 }
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 80241405a60ce7d05291eb79d838b5fe9218551d..854d16f67d57db105d866a7b2adb0585fde850f2 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -70,6 +70,8 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_INVALID_MSG                   TAOS_DEF_ERROR_CODE(0, 0x0108)
 #define TSDB_CODE_MSG_NOT_PROCESSED             TAOS_DEF_ERROR_CODE(0, 0x0109)
 #define TSDB_CODE_INVALID_PARA                  TAOS_DEF_ERROR_CODE(0, 0x010A)
+#define TSDB_CODE_REPEAT_INIT                   TAOS_DEF_ERROR_CODE(0, 0x010B)
+
 #define TSDB_CODE_REF_NO_MEMORY                 TAOS_DEF_ERROR_CODE(0, 0x0110)
 #define TSDB_CODE_REF_FULL                      TAOS_DEF_ERROR_CODE(0, 0x0111)
 #define TSDB_CODE_REF_ID_REMOVED                TAOS_DEF_ERROR_CODE(0, 0x0112)
diff --git a/source/dnode/mgmt/daemon/src/daemon.c b/source/dnode/mgmt/daemon/src/daemon.c
index cedab6266e65734fc0f18790788bd0b2bb4b9bf6..4e98a354837ba29103a93c505b4a605852b324b5 100644
--- a/source/dnode/mgmt/daemon/src/daemon.c
+++ b/source/dnode/mgmt/daemon/src/daemon.c
@@ -28,11 +28,11 @@ static struct {
   bool printAuth;
   bool printVersion;
   char configDir[PATH_MAX];
-} global = {0};
+} dmn = {0};
 
 void dmnSigintHandle(int signum, void *info, void *ctx) {
   uInfo("singal:%d is received", signum);
-  global.stop = true;
+  dmn.stop = true;
 }
 
 void dmnSetSignalHandle() {
@@ -44,7 +44,7 @@ void dmnSetSignalHandle() {
 }
 
 int dmnParseOption(int argc, char const *argv[]) {
-  tstrncpy(global.configDir, "/etc/taos", PATH_MAX);
+  tstrncpy(dmn.configDir, "/etc/taos", PATH_MAX);
 
   for (int i = 1; i < argc; ++i) {
     if (strcmp(argv[i], "-c") == 0) {
@@ -53,19 +53,19 @@ int dmnParseOption(int argc, char const *argv[]) {
           printf("config file path overflow");
           return -1;
         }
-        tstrncpy(global.configDir, argv[i], PATH_MAX);
+        tstrncpy(dmn.configDir, argv[i], PATH_MAX);
       } else {
         printf("'-c' requires a parameter, default is %s\n", configDir);
         return -1;
       }
     } else if (strcmp(argv[i], "-C") == 0) {
-      global.dumpConfig = true;
+      dmn.dumpConfig = true;
     } else if (strcmp(argv[i], "-k") == 0) {
-      global.generateGrant = true;
+      dmn.generateGrant = true;
     } else if (strcmp(argv[i], "-A") == 0) {
-      global.printAuth = true;
+      dmn.printAuth = true;
     } else if (strcmp(argv[i], "-V") == 0) {
-      global.printVersion = true;
+      dmn.printVersion = true;
     } else {
     }
   }
@@ -92,7 +92,7 @@ void dmnPrintVersion() {
 }
 
 int dmnReadConfig(const char *path) {
-  tstrncpy(configDir, global.configDir, PATH_MAX);
+  tstrncpy(configDir, dmn.configDir, PATH_MAX);
   taosInitGlobalCfg();
   taosReadGlobalLogCfg();
 
@@ -114,12 +114,12 @@ int dmnReadConfig(const char *path) {
   }
 
   if (taosReadCfgFromFile() != 0) {
-    uError("failed to read global config");
+    uError("failed to read config");
     return -1;
   }
 
   if (taosCheckAndPrintCfg() != 0) {
-    uError("failed to check global config");
+    uError("failed to check config");
     return -1;
   }
 
@@ -131,38 +131,50 @@ void dmnDumpConfig() { taosDumpGlobalCfg(); }
 
 void dmnWaitSignal() {
   dmnSetSignalHandle();
-  while (!global.stop) {
+  while (!dmn.stop) {
     taosMsleep(100);
   }
 }
 
-void dmnInitOption(SDnodeOpt *pOption) {
-  pOption->sver = 30000000; //3.0.0.0
-  pOption->numOfCores = tsNumOfCores;
-  pOption->numOfSupportVnodes = tsNumOfSupportVnodes;
-  pOption->numOfCommitThreads = tsNumOfCommitThreads;
-  pOption->statusInterval = tsStatusInterval;
-  pOption->numOfThreadsPerCore = tsNumOfThreadsPerCore;
-  pOption->ratioOfQueryCores = tsRatioOfQueryCores;
-  pOption->maxShellConns = tsMaxShellConns;
-  pOption->shellActivityTimer = tsShellActivityTimer;
-  pOption->serverPort = tsServerPort;
-  tstrncpy(pOption->dataDir, tsDataDir, TSDB_FILENAME_LEN);
-  tstrncpy(pOption->localEp, tsLocalEp, TSDB_EP_LEN);
-  tstrncpy(pOption->localFqdn, tsLocalFqdn, TSDB_FQDN_LEN);
-  tstrncpy(pOption->firstEp, tsFirst, TSDB_EP_LEN);
-  tstrncpy(pOption->timezone, tsTimezone, TSDB_TIMEZONE_LEN);
-  tstrncpy(pOption->locale, tsLocale, TSDB_LOCALE_LEN);
-  tstrncpy(pOption->charset, tsCharset, TSDB_LOCALE_LEN);
-  tstrncpy(pOption->buildinfo, buildinfo, 64);
-  tstrncpy(pOption->gitinfo, gitinfo, 48);
+void dnmInitEnvCfg(SDnodeEnvCfg *pCfg) {
+  pCfg->sver = 30000000;  // 3.0.0.0
+  pCfg->numOfCores = tsNumOfCores;
+  pCfg->enableTelem = 0;
+  tstrncpy(pCfg->timezone, tsTimezone, TSDB_TIMEZONE_LEN);
+  tstrncpy(pCfg->locale, tsLocale, TSDB_LOCALE_LEN);
+  tstrncpy(pCfg->charset, tsCharset, TSDB_LOCALE_LEN);
+  tstrncpy(pCfg->buildinfo, buildinfo, 64);
+  tstrncpy(pCfg->gitinfo, gitinfo, 48);
+}
+
+void dmnInitObjCfg(SDnodeObjCfg *pCfg) {
+  pCfg->numOfSupportVnodes = tsNumOfSupportVnodes;
+  pCfg->numOfCommitThreads = tsNumOfCommitThreads;
+  pCfg->statusInterval = tsStatusInterval;
+  pCfg->numOfThreadsPerCore = tsNumOfThreadsPerCore;
+  pCfg->ratioOfQueryCores = tsRatioOfQueryCores;
+  pCfg->maxShellConns = tsMaxShellConns;
+  pCfg->shellActivityTimer = tsShellActivityTimer;
+  pCfg->serverPort = tsServerPort;
+  tstrncpy(pCfg->dataDir, tsDataDir, TSDB_FILENAME_LEN);
+  tstrncpy(pCfg->localEp, tsLocalEp, TSDB_EP_LEN);
+  tstrncpy(pCfg->localFqdn, tsLocalFqdn, TSDB_FQDN_LEN);
+  tstrncpy(pCfg->firstEp, tsFirst, TSDB_EP_LEN);
 }
 
 int dmnRunDnode() {
-  SDnodeOpt option = {0};
-  dmnInitOption(&option);
+  SDnodeEnvCfg envCfg = {0};
+  SDnodeObjCfg objCfg = {0};
+
+  dnmInitEnvCfg(&envCfg);
+  dmnInitObjCfg(&objCfg);
+
+  if (dndInit(&envCfg) != 0) {
+    uInfo("Failed to start TDengine, please check the log at %s", tsLogDir);
+    return -1;
+  }
 
-  SDnode *pDnode = dndInit(&option);
+  SDnode *pDnode = dndCreate(&objCfg);
   if (pDnode == NULL) {
     uInfo("Failed to start TDengine, please check the log at %s", tsLogDir);
     return -1;
@@ -172,7 +184,8 @@ int dmnRunDnode() {
   dmnWaitSignal();
   uInfo("TDengine is shut down!");
 
-  dndCleanup(pDnode);
+  dndClose(pDnode);
+  dndCleanup();
   taosCloseLog();
   return 0;
 }
@@ -182,21 +195,21 @@ int main(int argc, char const *argv[]) {
     return -1;
   }
 
-  if (global.generateGrant) {
+  if (dmn.generateGrant) {
     dmnGenerateGrant();
     return 0;
   }
 
-  if (global.printVersion) {
+  if (dmn.printVersion) {
     dmnPrintVersion();
     return 0;
   }
 
-  if (dmnReadConfig(global.configDir) != 0) {
+  if (dmnReadConfig(dmn.configDir) != 0) {
     return -1;
   }
 
-  if (global.dumpConfig) {
+  if (dmn.dumpConfig) {
     dmnDumpConfig();
     return 0;
   }
diff --git a/source/dnode/mgmt/impl/inc/dndEnv.h b/source/dnode/mgmt/impl/inc/dndEnv.h
index 61d9dd93bec13a1bfd154de442522e2d6bf3d5ed..e80237bb9cb72ec6836a91e533d08a7cdf81b01f 100644
--- a/source/dnode/mgmt/impl/inc/dndEnv.h
+++ b/source/dnode/mgmt/impl/inc/dndEnv.h
@@ -20,8 +20,127 @@
 extern "C" {
 #endif
 
-#include "dndEnv.h"
+#include "dndInt.h"
 
+typedef struct {
+  EWorkerType type;
+  const char *name;
+  int32_t     minNum;
+  int32_t     maxNum;
+  void       *queueFp;
+  SDnode     *pDnode;
+  STaosQueue *queue;
+  union {
+    SWorkerPool  pool;
+    SMWorkerPool mpool;
+  };
+} SDnodeWorker;
+
+typedef struct {
+  char *dnode;
+  char *mnode;
+  char *snode;
+  char *bnode;
+  char *vnodes;
+} SDnodeDir;
+
+typedef struct {
+  int32_t      dnodeId;
+  int32_t      dropped;
+  int64_t      clusterId;
+  int64_t      dver;
+  int64_t      rebootTime;
+  int64_t      updateTime;
+  int8_t       statusSent;
+  SEpSet       mnodeEpSet;
+  char        *file;
+  SHashObj    *dnodeHash;
+  SDnodeEps   *dnodeEps;
+  pthread_t   *threadId;
+  SRWLatch     latch;
+  SDnodeWorker mgmtWorker;
+  SDnodeWorker statusWorker;
+} SDnodeMgmt;
+
+typedef struct {
+  int32_t      refCount;
+  int8_t       deployed;
+  int8_t       dropped;
+  SMnode      *pMnode;
+  SRWLatch     latch;
+  SDnodeWorker readWorker;
+  SDnodeWorker writeWorker;
+  SDnodeWorker syncWorker;
+  int8_t       replica;
+  int8_t       selfIndex;
+  SReplica     replicas[TSDB_MAX_REPLICA];
+} SMnodeMgmt;
+
+typedef struct {
+  int32_t      refCount;
+  int8_t       deployed;
+  int8_t       dropped;
+  SQnode      *pQnode;
+  SRWLatch     latch;
+  SDnodeWorker queryWorker;
+  SDnodeWorker fetchWorker;
+} SQnodeMgmt;
+
+typedef struct {
+  int32_t      refCount;
+  int8_t       deployed;
+  int8_t       dropped;
+  SSnode      *pSnode;
+  SRWLatch     latch;
+  SDnodeWorker writeWorker;
+} SSnodeMgmt;
+
+typedef struct {
+  int32_t      refCount;
+  int8_t       deployed;
+  int8_t       dropped;
+  SBnode      *pBnode;
+  SRWLatch     latch;
+  SDnodeWorker writeWorker;
+} SBnodeMgmt;
+
+typedef struct {
+  SHashObj    *hash;
+  int32_t      openVnodes;
+  int32_t      totalVnodes;
+  SRWLatch     latch;
+  SWorkerPool  queryPool;
+  SWorkerPool  fetchPool;
+  SMWorkerPool syncPool;
+  SMWorkerPool writePool;
+} SVnodesMgmt;
+
+typedef struct {
+  void    *serverRpc;
+  void    *clientRpc;
+  DndMsgFp msgFp[TDMT_MAX];
+} STransMgmt;
+
+typedef struct SDnode {
+  EStat        stat;
+  SDnodeObjCfg cfg;
+  SDnodeEnvCfg env;
+  SDnodeDir    dir;
+  FileFd       lockFd;
+  SDnodeMgmt   dmgmt;
+  SMnodeMgmt   mmgmt;
+  SQnodeMgmt   qmgmt;
+  SSnodeMgmt   smgmt;
+  SBnodeMgmt   bmgmt;
+  SVnodesMgmt  vmgmt;
+  STransMgmt   tmgmt;
+  SStartupReq  startup;
+} SDnode;
+
+typedef struct {
+  int8_t       once;
+  SDnodeEnvCfg cfg;
+} SDnodeEnv;
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/impl/inc/dndInt.h b/source/dnode/mgmt/impl/inc/dndInt.h
index e637b38815458b6618f24cfd8a13308c9cb81295..c5ba494e5ea9811f49c90266af6b56cd475ea609 100644
--- a/source/dnode/mgmt/impl/inc/dndInt.h
+++ b/source/dnode/mgmt/impl/inc/dndInt.h
@@ -55,125 +55,12 @@ extern int32_t dDebugFlag;
 
 typedef enum { DND_STAT_INIT, DND_STAT_RUNNING, DND_STAT_STOPPED } EStat;
 typedef enum { DND_WORKER_SINGLE, DND_WORKER_MULTI } EWorkerType;
+typedef enum { DND_ENV_INIT = 0, DND_ENV_READY = 1, DND_ENV_CLEANUP = 2 } EEnvStat;
 typedef void (*DndMsgFp)(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEps);
 
-typedef struct {
-  EWorkerType    type;
-  const char    *name;
-  int32_t        minNum;
-  int32_t        maxNum;
-  void          *queueFp;
-  SDnode        *pDnode;
-  STaosQueue    *queue;
-  union {
-    SWorkerPool  pool;
-    SMWorkerPool mpool;
-  };
-} SDnodeWorker;
-
-typedef struct {
-  char *dnode;
-  char *mnode;
-  char *snode;
-  char *bnode;
-  char *vnodes;
-} SDnodeDir;
-
-typedef struct {
-  int32_t      dnodeId;
-  int32_t      dropped;
-  int64_t      clusterId;
-  int64_t      dver;
-  int64_t      rebootTime;
-  int64_t      updateTime;
-  int8_t       statusSent;
-  SEpSet       mnodeEpSet;
-  char        *file;
-  SHashObj    *dnodeHash;
-  SDnodeEps   *dnodeEps;
-  pthread_t   *threadId;
-  SRWLatch     latch;
-  SDnodeWorker mgmtWorker;
-  SDnodeWorker statusWorker;
-} SDnodeMgmt;
-
-typedef struct {
-  int32_t      refCount;
-  int8_t       deployed;
-  int8_t       dropped;
-  SMnode      *pMnode;
-  SRWLatch     latch;
-  SDnodeWorker readWorker;
-  SDnodeWorker writeWorker;
-  SDnodeWorker syncWorker;
-  int8_t       replica;
-  int8_t       selfIndex;
-  SReplica     replicas[TSDB_MAX_REPLICA];
-} SMnodeMgmt;
-
-typedef struct {
-  int32_t      refCount;
-  int8_t       deployed;
-  int8_t       dropped;
-  SQnode      *pQnode;
-  SRWLatch     latch;
-  SDnodeWorker queryWorker;
-  SDnodeWorker fetchWorker;
-} SQnodeMgmt;
-
-typedef struct {
-  int32_t      refCount;
-  int8_t       deployed;
-  int8_t       dropped;
-  SSnode      *pSnode;
-  SRWLatch     latch;
-  SDnodeWorker writeWorker;
-} SSnodeMgmt;
-
-typedef struct {
-  int32_t      refCount;
-  int8_t       deployed;
-  int8_t       dropped;
-  SBnode      *pBnode;
-  SRWLatch     latch;
-  SDnodeWorker writeWorker;
-} SBnodeMgmt;
-
-typedef struct {
-  SHashObj    *hash;
-  int32_t      openVnodes;
-  int32_t      totalVnodes;
-  SRWLatch     latch;
-  SWorkerPool  queryPool;
-  SWorkerPool  fetchPool;
-  SMWorkerPool syncPool;
-  SMWorkerPool writePool;
-} SVnodesMgmt;
-
-typedef struct {
-  void    *serverRpc;
-  void    *clientRpc;
-  DndMsgFp msgFp[TDMT_MAX];
-} STransMgmt;
-
-typedef struct SDnode {
-  EStat       stat;
-  SDnodeOpt   opt;
-  SDnodeDir   dir;
-  FileFd      lockFd;
-  SDnodeMgmt  dmgmt;
-  SMnodeMgmt  mmgmt;
-  SQnodeMgmt  qmgmt;
-  SSnodeMgmt  smgmt;
-  SBnodeMgmt  bmgmt;
-  SVnodesMgmt vmgmt;
-  STransMgmt  tmgmt;
-  SStartupReq startup;
-} SDnode;
-
-EStat dndGetStat(SDnode *pDnode);
-void  dndSetStat(SDnode *pDnode, EStat stat);
-char *dndStatStr(EStat stat);
+EStat       dndGetStat(SDnode *pDnode);
+void        dndSetStat(SDnode *pDnode, EStat stat);
+const char *dndStatStr(EStat stat);
 
 void dndReportStartup(SDnode *pDnode, char *pName, char *pDesc);
 void dndGetStartup(SDnode *pDnode, SStartupReq *pStartup);
diff --git a/source/dnode/mgmt/impl/src/dndBnode.c b/source/dnode/mgmt/impl/src/dndBnode.c
index 15be59a4193c8964a6509abf47beaa21b6d91a3e..ce058ebba43e5ace9e538e62ac626b32aff48754 100644
--- a/source/dnode/mgmt/impl/src/dndBnode.c
+++ b/source/dnode/mgmt/impl/src/dndBnode.c
@@ -179,7 +179,7 @@ static void dndBuildBnodeOption(SDnode *pDnode, SBnodeOpt *pOption) {
   pOption->sendRedirectRspFp = dndSendRedirectRsp;
   pOption->dnodeId = dndGetDnodeId(pDnode);
   pOption->clusterId = dndGetClusterId(pDnode);
-  pOption->cfg.sver = pDnode->opt.sver;
+  pOption->cfg.sver = pDnode->env.sver;
 }
 
 static int32_t dndOpenBnode(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndEnv.c b/source/dnode/mgmt/impl/src/dndEnv.c
index f3d5e095641efea5f1ce9326da982b930ac5f4b3..44a01049ba3ef0189ec3a0a603dcbab9ac766054 100644
--- a/source/dnode/mgmt/impl/src/dndEnv.c
+++ b/source/dnode/mgmt/impl/src/dndEnv.c
@@ -25,6 +25,8 @@
 #include "tfs.h"
 #include "wal.h"
 
+static SDnodeEnv dndEnv = {0};
+
 EStat dndGetStat(SDnode *pDnode) { return pDnode->stat; }
 
 void dndSetStat(SDnode *pDnode, EStat stat) {
@@ -32,7 +34,7 @@ void dndSetStat(SDnode *pDnode, EStat stat) {
   pDnode->stat = stat;
 }
 
-char *dndStatStr(EStat stat) {
+const char *dndStatStr(EStat stat) {
   switch (stat) {
     case DND_STAT_INIT:
       return "init";
@@ -79,25 +81,26 @@ static FileFd dndCheckRunning(char *dataDir) {
   return fd;
 }
 
-static int32_t dndInitEnv(SDnode *pDnode, SDnodeOpt *pOption) {
-  pDnode->lockFd = dndCheckRunning(pOption->dataDir);
+static int32_t dndCreateImp(SDnode *pDnode, SDnodeObjCfg *pCfg) {
+  pDnode->lockFd = dndCheckRunning(pCfg->dataDir);
   if (pDnode->lockFd < 0) {
     return -1;
   }
 
   char path[PATH_MAX + 100];
-  snprintf(path, sizeof(path), "%s%smnode", pOption->dataDir, TD_DIRSEP);
+  snprintf(path, sizeof(path), "%s%smnode", pCfg->dataDir, TD_DIRSEP);
   pDnode->dir.mnode = tstrdup(path);
-  snprintf(path, sizeof(path), "%s%svnode", pOption->dataDir, TD_DIRSEP);
+  snprintf(path, sizeof(path), "%s%svnode", pCfg->dataDir, TD_DIRSEP);
   pDnode->dir.vnodes = tstrdup(path);
-  snprintf(path, sizeof(path), "%s%sdnode", pOption->dataDir, TD_DIRSEP);
+  snprintf(path, sizeof(path), "%s%sdnode", pCfg->dataDir, TD_DIRSEP);
   pDnode->dir.dnode = tstrdup(path);
-  snprintf(path, sizeof(path), "%s%ssnode", pOption->dataDir, TD_DIRSEP);
+  snprintf(path, sizeof(path), "%s%ssnode", pCfg->dataDir, TD_DIRSEP);
   pDnode->dir.snode = tstrdup(path);
-  snprintf(path, sizeof(path), "%s%sbnode", pOption->dataDir, TD_DIRSEP);
+  snprintf(path, sizeof(path), "%s%sbnode", pCfg->dataDir, TD_DIRSEP);
   pDnode->dir.bnode = tstrdup(path);
 
-  if (pDnode->dir.mnode == NULL || pDnode->dir.vnodes == NULL || pDnode->dir.dnode == NULL) {
+  if (pDnode->dir.mnode == NULL || pDnode->dir.vnodes == NULL || pDnode->dir.dnode == NULL ||
+      pDnode->dir.snode == NULL || pDnode->dir.bnode == NULL) {
     dError("failed to malloc dir object");
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
@@ -133,11 +136,12 @@ static int32_t dndInitEnv(SDnode *pDnode, SDnodeOpt *pOption) {
     return -1;
   }
 
-  memcpy(&pDnode->opt, pOption, sizeof(SDnodeOpt));
+  memcpy(&pDnode->cfg, pCfg, sizeof(SDnodeObjCfg));
+  memcpy(&pDnode->env, &dndEnv.cfg, sizeof(SDnodeEnvCfg));
   return 0;
 }
 
-static void dndCleanupEnv(SDnode *pDnode) {
+static void dndCloseImp(SDnode *pDnode) {
   tfree(pDnode->dir.mnode);
   tfree(pDnode->dir.vnodes);
   tfree(pDnode->dir.dnode);
@@ -149,126 +153,121 @@ static void dndCleanupEnv(SDnode *pDnode) {
     taosCloseFile(pDnode->lockFd);
     pDnode->lockFd = 0;
   }
-
-  taosStopCacheRefreshWorker();
 }
 
-SDnode *dndInit(SDnodeOpt *pOption) {
-  taosIgnSIGPIPE();
-  taosBlockSIGPIPE();
-  taosResolveCRC();
+SDnode *dndCreate(SDnodeObjCfg *pCfg) {
+  dInfo("start to create dnode object");
 
   SDnode *pDnode = calloc(1, sizeof(SDnode));
   if (pDnode == NULL) {
-    dError("failed to create dnode object");
     terrno = TSDB_CODE_OUT_OF_MEMORY;
+    dError("failed to create dnode object since %s", terrstr());
     return NULL;
   }
 
-  dInfo("start to initialize TDengine");
   dndSetStat(pDnode, DND_STAT_INIT);
 
-  if (dndInitEnv(pDnode, pOption) != 0) {
-    dError("failed to init env");
-    dndCleanup(pDnode);
+  if (dndCreateImp(pDnode, pCfg) != 0) {
+    dError("failed to init dnode dir since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (rpcInit() != 0) {
-    dError("failed to init rpc env");
-    dndCleanup(pDnode);
+    dError("failed to init rpc since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (walInit() != 0) {
-    dError("failed to init wal env");
-    dndCleanup(pDnode);
+    dError("failed to init wal since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   SDiskCfg dCfg;
-  strcpy(dCfg.dir, pDnode->opt.dataDir);
+  strcpy(dCfg.dir, pDnode->cfg.dataDir);
   dCfg.level = 0;
   dCfg.primary = 1;
   if (tfsInit(&dCfg, 1) != 0) {
-    dError("failed to init tfs env");
-    dndCleanup(pDnode);
+    dError("failed to init tfs since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   SVnodeOpt vnodeOpt = {
-      .sver = pDnode->opt.sver,
-      .timezone = pDnode->opt.timezone,
-      .locale = pDnode->opt.locale,
-      .charset = pDnode->opt.charset,
-      .nthreads = pDnode->opt.numOfCommitThreads,
+      .sver = pDnode->env.sver,
+      .timezone = pDnode->env.timezone,
+      .locale = pDnode->env.locale,
+      .charset = pDnode->env.charset,
+      .nthreads = pDnode->cfg.numOfCommitThreads,
       .putReqToVQueryQFp = dndPutReqToVQueryQ,
   };
   if (vnodeInit(&vnodeOpt) != 0) {
-    dError("failed to init vnode env");
-    dndCleanup(pDnode);
+    dError("failed to init vnode since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitMgmt(pDnode) != 0) {
-    dError("failed to init dnode");
-    dndCleanup(pDnode);
+    dError("failed to init mgmt since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitVnodes(pDnode) != 0) {
-    dError("failed to init vnodes");
-    dndCleanup(pDnode);
+    dError("failed to init vnodes since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitQnode(pDnode) != 0) {
-    dError("failed to init qnode");
-    dndCleanup(pDnode);
+    dError("failed to init qnode since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitSnode(pDnode) != 0) {
-    dError("failed to init snode");
-    dndCleanup(pDnode);
+    dError("failed to init snode since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitBnode(pDnode) != 0) {
-    dError("failed to init bnode");
-    dndCleanup(pDnode);
+    dError("failed to init bnode since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitMnode(pDnode) != 0) {
-    dError("failed to init mnode");
-    dndCleanup(pDnode);
+    dError("failed to init mnode since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   if (dndInitTrans(pDnode) != 0) {
-    dError("failed to init transport");
-    dndCleanup(pDnode);
+    dError("failed to init transport since %s", terrstr());
+    dndClose(pDnode);
     return NULL;
   }
 
   dndSetStat(pDnode, DND_STAT_RUNNING);
   dndSendStatusReq(pDnode);
   dndReportStartup(pDnode, "TDengine", "initialized successfully");
-  dInfo("TDengine is initialized successfully, pDnode:%p", pDnode);
+  dInfo("dnode object is created, data:%p", pDnode);
 
   return pDnode;
 }
 
-void dndCleanup(SDnode *pDnode) {
+void dndClose(SDnode *pDnode) {
   if (pDnode == NULL) return;
 
   if (dndGetStat(pDnode) == DND_STAT_STOPPED) {
-    dError("dnode is shutting down");
+    dError("dnode is shutting down, data:%p", pDnode);
     return;
   }
 
-  dInfo("start to cleanup TDengine");
+  dInfo("start to close dnode, data:%p", pDnode);
   dndSetStat(pDnode, DND_STAT_STOPPED);
   dndCleanupTrans(pDnode);
   dndStopMgmt(pDnode);
@@ -283,7 +282,33 @@ void dndCleanup(SDnode *pDnode) {
   walCleanUp();
   rpcCleanup();
 
-  dndCleanupEnv(pDnode);
+  dndCloseImp(pDnode);
   free(pDnode);
-  dInfo("TDengine is cleaned up successfully");
+  dInfo("dnode object is closed, data:%p", pDnode);
 }
+
+int32_t dndInit(const SDnodeEnvCfg *pCfg) {
+  if (atomic_val_compare_exchange_8(&dndEnv.once, DND_ENV_INIT, DND_ENV_READY) != DND_ENV_INIT) {
+    terrno = TSDB_CODE_REPEAT_INIT;
+    dError("failed to init dnode env since %s", terrstr());
+    return -1;
+  }
+
+  taosIgnSIGPIPE();
+  taosBlockSIGPIPE();
+  taosResolveCRC();
+
+  memcpy(&dndEnv.cfg, pCfg, sizeof(SDnodeEnvCfg));
+  dInfo("dnode env is initialized");
+  return 0;
+}
+
+void dndCleanup() {
+  if (atomic_val_compare_exchange_8(&dndEnv.once, DND_ENV_READY, DND_ENV_CLEANUP) != DND_ENV_READY) {
+    dError("dnode env is already cleaned up");
+    return;
+  }
+
+  taosStopCacheRefreshWorker();
+  dInfo("dnode env is cleaned up");
+}
\ No newline at end of file
diff --git a/source/dnode/mgmt/impl/src/dndMgmt.c b/source/dnode/mgmt/impl/src/dndMgmt.c
index d9edf39b732fe94b79d443bbd4a0c497341dc4bc..507f9a2644489e76e92ac45b3e2a1bc81d7790f5 100644
--- a/source/dnode/mgmt/impl/src/dndMgmt.c
+++ b/source/dnode/mgmt/impl/src/dndMgmt.c
@@ -86,7 +86,7 @@ void dndSendRedirectRsp(SDnode *pDnode, SRpcMsg *pReq) {
   dDebug("RPC %p, req:%s is redirected, num:%d use:%d", pReq->handle, TMSG_INFO(msgType), epSet.numOfEps, epSet.inUse);
   for (int32_t i = 0; i < epSet.numOfEps; ++i) {
     dDebug("mnode index:%d %s:%u", i, epSet.fqdn[i], epSet.port[i]);
-    if (strcmp(epSet.fqdn[i], pDnode->opt.localFqdn) == 0 && epSet.port[i] == pDnode->opt.serverPort) {
+    if (strcmp(epSet.fqdn[i], pDnode->cfg.localFqdn) == 0 && epSet.port[i] == pDnode->cfg.serverPort) {
       epSet.inUse = (i + 1) % epSet.numOfEps;
     }
 
@@ -289,8 +289,8 @@ PRASE_DNODE_OVER:
   if (root != NULL) cJSON_Delete(root);
   if (fp != NULL) fclose(fp);
 
-  if (dndIsEpChanged(pDnode, pMgmt->dnodeId, pDnode->opt.localEp)) {
-    dError("localEp %s different with %s and need reconfigured", pDnode->opt.localEp, pMgmt->file);
+  if (dndIsEpChanged(pDnode, pMgmt->dnodeId, pDnode->cfg.localEp)) {
+    dError("localEp %s different with %s and need reconfigured", pDnode->cfg.localEp, pMgmt->file);
     return -1;
   }
 
@@ -298,7 +298,7 @@ PRASE_DNODE_OVER:
     pMgmt->dnodeEps = calloc(1, sizeof(SDnodeEps) + sizeof(SDnodeEp));
     pMgmt->dnodeEps->num = 1;
     pMgmt->dnodeEps->eps[0].isMnode = 1;
-    taosGetFqdnPortFromEp(pDnode->opt.firstEp, pMgmt->dnodeEps->eps[0].fqdn, &pMgmt->dnodeEps->eps[0].port);
+    taosGetFqdnPortFromEp(pDnode->cfg.firstEp, pMgmt->dnodeEps->eps[0].fqdn, &pMgmt->dnodeEps->eps[0].port);
   }
 
   dndResetDnodes(pDnode, pMgmt->dnodeEps);
@@ -362,24 +362,24 @@ void dndSendStatusReq(SDnode *pDnode) {
 
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosRLockLatch(&pMgmt->latch);
-  pStatus->sver = htonl(pDnode->opt.sver);
+  pStatus->sver = htonl(pDnode->env.sver);
   pStatus->dver = htobe64(pMgmt->dver);
   pStatus->dnodeId = htonl(pMgmt->dnodeId);
   pStatus->clusterId = htobe64(pMgmt->clusterId);
   pStatus->rebootTime = htobe64(pMgmt->rebootTime);
   pStatus->updateTime = htobe64(pMgmt->updateTime);
-  pStatus->numOfCores = htonl(pDnode->opt.numOfCores);
-  pStatus->numOfSupportVnodes = htonl(pDnode->opt.numOfSupportVnodes);
-  tstrncpy(pStatus->dnodeEp, pDnode->opt.localEp, TSDB_EP_LEN);
+  pStatus->numOfCores = htonl(pDnode->env.numOfCores);
+  pStatus->numOfSupportVnodes = htonl(pDnode->cfg.numOfSupportVnodes);
+  tstrncpy(pStatus->dnodeEp, pDnode->cfg.localEp, TSDB_EP_LEN);
 
-  pStatus->clusterCfg.statusInterval = htonl(pDnode->opt.statusInterval);
+  pStatus->clusterCfg.statusInterval = htonl(pDnode->cfg.statusInterval);
   pStatus->clusterCfg.checkTime = 0;
   char timestr[32] = "1970-01-01 00:00:00.00";
   (void)taosParseTime(timestr, &pStatus->clusterCfg.checkTime, (int32_t)strlen(timestr), TSDB_TIME_PRECISION_MILLI, 0);
   pStatus->clusterCfg.checkTime = htonl(pStatus->clusterCfg.checkTime);
-  tstrncpy(pStatus->clusterCfg.timezone, pDnode->opt.timezone, TSDB_TIMEZONE_LEN);
-  tstrncpy(pStatus->clusterCfg.locale, pDnode->opt.locale, TSDB_LOCALE_LEN);
-  tstrncpy(pStatus->clusterCfg.charset, pDnode->opt.charset, TSDB_LOCALE_LEN);
+  tstrncpy(pStatus->clusterCfg.timezone, pDnode->env.timezone, TSDB_TIMEZONE_LEN);
+  tstrncpy(pStatus->clusterCfg.locale, pDnode->env.locale, TSDB_LOCALE_LEN);
+  tstrncpy(pStatus->clusterCfg.charset, pDnode->env.charset, TSDB_LOCALE_LEN);
   taosRUnLockLatch(&pMgmt->latch);
 
   dndGetVnodeLoads(pDnode, &pStatus->vnodeLoads);
@@ -485,7 +485,7 @@ void dndProcessStartupReq(SDnode *pDnode, SRpcMsg *pReq) {
 static void *dnodeThreadRoutine(void *param) {
   SDnode     *pDnode = param;
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
-  int32_t     ms = pDnode->opt.statusInterval * 1000;
+  int32_t     ms = pDnode->cfg.statusInterval * 1000;
 
   while (true) {
     pthread_testcancel();
diff --git a/source/dnode/mgmt/impl/src/dndMnode.c b/source/dnode/mgmt/impl/src/dndMnode.c
index 6c23af7f002970d10a89f3dfc441bc82ba2f8c2b..32730fc1e3a4631c91bbf01e2b36a3255566dee1 100644
--- a/source/dnode/mgmt/impl/src/dndMnode.c
+++ b/source/dnode/mgmt/impl/src/dndMnode.c
@@ -247,7 +247,7 @@ static bool dndNeedDeployMnode(SDnode *pDnode) {
     return false;
   }
 
-  if (strcmp(pDnode->opt.localEp, pDnode->opt.firstEp) != 0) {
+  if (strcmp(pDnode->cfg.localEp, pDnode->cfg.firstEp) != 0) {
     return false;
   }
 
@@ -266,15 +266,15 @@ static void dndInitMnodeOption(SDnode *pDnode, SMnodeOpt *pOption) {
   pOption->putReqToMWriteQFp = dndPutMsgToMWriteQ;
   pOption->dnodeId = dndGetDnodeId(pDnode);
   pOption->clusterId = dndGetClusterId(pDnode);
-  pOption->cfg.sver = pDnode->opt.sver;
-  pOption->cfg.enableTelem = pDnode->opt.enableTelem;
-  pOption->cfg.statusInterval = pDnode->opt.statusInterval;
-  pOption->cfg.shellActivityTimer = pDnode->opt.shellActivityTimer;
-  pOption->cfg.timezone = pDnode->opt.timezone;
-  pOption->cfg.charset = pDnode->opt.charset;
-  pOption->cfg.locale = pDnode->opt.locale;
-  pOption->cfg.gitinfo = pDnode->opt.gitinfo;
-  pOption->cfg.buildinfo = pDnode->opt.buildinfo;
+  pOption->cfg.sver = pDnode->env.sver;
+  pOption->cfg.enableTelem = pDnode->env.enableTelem;
+  pOption->cfg.statusInterval = pDnode->cfg.statusInterval;
+  pOption->cfg.shellActivityTimer = pDnode->cfg.shellActivityTimer;
+  pOption->cfg.timezone = pDnode->env.timezone;
+  pOption->cfg.charset = pDnode->env.charset;
+  pOption->cfg.locale = pDnode->env.locale;
+  pOption->cfg.gitinfo = pDnode->env.gitinfo;
+  pOption->cfg.buildinfo = pDnode->env.buildinfo;
 }
 
 static void dndBuildMnodeDeployOption(SDnode *pDnode, SMnodeOpt *pOption) {
@@ -283,8 +283,8 @@ static void dndBuildMnodeDeployOption(SDnode *pDnode, SMnodeOpt *pOption) {
   pOption->selfIndex = 0;
   SReplica *pReplica = &pOption->replicas[0];
   pReplica->id = 1;
-  pReplica->port = pDnode->opt.serverPort;
-  memcpy(pReplica->fqdn, pDnode->opt.localFqdn, TSDB_FQDN_LEN);
+  pReplica->port = pDnode->cfg.serverPort;
+  memcpy(pReplica->fqdn, pDnode->cfg.localFqdn, TSDB_FQDN_LEN);
 
   SMnodeMgmt *pMgmt = &pDnode->mmgmt;
   pMgmt->selfIndex = pOption->selfIndex;
diff --git a/source/dnode/mgmt/impl/src/dndQnode.c b/source/dnode/mgmt/impl/src/dndQnode.c
index 9d2f623c4578aea7d4180a66c09710fc4bb320c5..9a8d49010cc499add3f7cba10108df1f4e3a0449 100644
--- a/source/dnode/mgmt/impl/src/dndQnode.c
+++ b/source/dnode/mgmt/impl/src/dndQnode.c
@@ -185,7 +185,7 @@ static void dndBuildQnodeOption(SDnode *pDnode, SQnodeOpt *pOption) {
   pOption->sendRedirectRspFp = dndSendRedirectRsp;
   pOption->dnodeId = dndGetDnodeId(pDnode);
   pOption->clusterId = dndGetClusterId(pDnode);
-  pOption->cfg.sver = pDnode->opt.sver;
+  pOption->cfg.sver = pDnode->env.sver;
 }
 
 static int32_t dndOpenQnode(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndSnode.c b/source/dnode/mgmt/impl/src/dndSnode.c
index 00435d4c3e45a4433defc7fdb28260195748bf00..a07f02e761ddec59e69b055a7d5f7d81dab1bdd9 100644
--- a/source/dnode/mgmt/impl/src/dndSnode.c
+++ b/source/dnode/mgmt/impl/src/dndSnode.c
@@ -179,7 +179,7 @@ static void dndBuildSnodeOption(SDnode *pDnode, SSnodeOpt *pOption) {
   pOption->sendRedirectRspFp = dndSendRedirectRsp;
   pOption->dnodeId = dndGetDnodeId(pDnode);
   pOption->clusterId = dndGetClusterId(pDnode);
-  pOption->cfg.sver = pDnode->opt.sver;
+  pOption->cfg.sver = pDnode->env.sver;
 }
 
 static int32_t dndOpenSnode(SDnode *pDnode) {
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 509e8f4cab47ad69360ec1c62ec45b827c5dd0e7..ab4ae4ac53c60a1d8d9d8fdef7010e221c6b8b3c 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -176,7 +176,7 @@ static int32_t dndInitClient(SDnode *pDnode) {
   rpcInit.cfp = dndProcessResponse;
   rpcInit.sessions = 1024;
   rpcInit.connType = TAOS_CONN_CLIENT;
-  rpcInit.idleTime = pDnode->opt.shellActivityTimer * 1000;
+  rpcInit.idleTime = pDnode->cfg.shellActivityTimer * 1000;
   rpcInit.user = INTERNAL_USER;
   rpcInit.ckey = INTERNAL_CKEY;
   rpcInit.secret = INTERNAL_SECRET;
@@ -325,20 +325,20 @@ static int32_t dndInitServer(SDnode *pDnode) {
   STransMgmt *pMgmt = &pDnode->tmgmt;
   dndInitMsgFp(pMgmt);
 
-  int32_t numOfThreads = (int32_t)((pDnode->opt.numOfCores * pDnode->opt.numOfThreadsPerCore) / 2.0);
+  int32_t numOfThreads = (int32_t)((pDnode->env.numOfCores * pDnode->cfg.numOfThreadsPerCore) / 2.0);
   if (numOfThreads < 1) {
     numOfThreads = 1;
   }
 
   SRpcInit rpcInit;
   memset(&rpcInit, 0, sizeof(rpcInit));
-  rpcInit.localPort = pDnode->opt.serverPort;
+  rpcInit.localPort = pDnode->cfg.serverPort;
   rpcInit.label = "DND-S";
   rpcInit.numOfThreads = numOfThreads;
   rpcInit.cfp = dndProcessRequest;
-  rpcInit.sessions = pDnode->opt.maxShellConns;
+  rpcInit.sessions = pDnode->cfg.maxShellConns;
   rpcInit.connType = TAOS_CONN_SERVER;
-  rpcInit.idleTime = pDnode->opt.shellActivityTimer * 1000;
+  rpcInit.idleTime = pDnode->cfg.shellActivityTimer * 1000;
   rpcInit.afp = dndRetrieveUserAuthInfo;
   rpcInit.parent = pDnode;
 
diff --git a/source/dnode/mgmt/impl/src/dndVnodes.c b/source/dnode/mgmt/impl/src/dndVnodes.c
index 2d7999fe5ac77c70d3906945efca056f79b08911..156009fa6822ee922170ac44b7e9aae0d8a39482 100644
--- a/source/dnode/mgmt/impl/src/dndVnodes.c
+++ b/source/dnode/mgmt/impl/src/dndVnodes.c
@@ -420,7 +420,7 @@ static int32_t dndOpenVnodes(SDnode *pDnode) {
 
   pMgmt->totalVnodes = numOfVnodes;
 
-  int32_t threadNum = pDnode->opt.numOfCores;
+  int32_t threadNum = pDnode->env.numOfCores;
   int32_t vnodesPerThread = numOfVnodes / threadNum + 1;
 
   SVnodeThread *threads = calloc(threadNum, sizeof(SVnodeThread));
@@ -904,11 +904,11 @@ static int32_t dndInitVnodeWorkers(SDnode *pDnode) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
 
   int32_t maxFetchThreads = 4;
-  int32_t minFetchThreads = MIN(maxFetchThreads, pDnode->opt.numOfCores);
-  int32_t minQueryThreads = MAX((int32_t)(pDnode->opt.numOfCores * pDnode->opt.ratioOfQueryCores), 1);
+  int32_t minFetchThreads = MIN(maxFetchThreads, pDnode->env.numOfCores);
+  int32_t minQueryThreads = MAX((int32_t)(pDnode->env.numOfCores * pDnode->cfg.ratioOfQueryCores), 1);
   int32_t maxQueryThreads = minQueryThreads;
-  int32_t maxWriteThreads = MAX(pDnode->opt.numOfCores, 1);
-  int32_t maxSyncThreads = MAX(pDnode->opt.numOfCores / 2, 1);
+  int32_t maxWriteThreads = MAX(pDnode->env.numOfCores, 1);
+  int32_t maxSyncThreads = MAX(pDnode->env.numOfCores / 2, 1);
 
   SWorkerPool *pPool = &pMgmt->queryPool;
   pPool->name = "vnode-query";
diff --git a/source/dnode/mgmt/impl/test/sut/inc/server.h b/source/dnode/mgmt/impl/test/sut/inc/server.h
index 5f9e4846a7063826d89ed217833afdd4a55095cc..99554a7aa78c2e3ffa57ab848a8ccc29c4c7281e 100644
--- a/source/dnode/mgmt/impl/test/sut/inc/server.h
+++ b/source/dnode/mgmt/impl/test/sut/inc/server.h
@@ -24,7 +24,7 @@ class TestServer {
   bool DoStart();
 
  private:
-  SDnodeOpt BuildOption(const char* path, const char* fqdn, uint16_t port, const char* firstEp);
+  SDnodeObjCfg BuildOption(const char* path, const char* fqdn, uint16_t port, const char* firstEp);
 
  private:
   SDnode*    pDnode;
diff --git a/source/dnode/mgmt/impl/test/sut/src/server.cpp b/source/dnode/mgmt/impl/test/sut/src/server.cpp
index fb2974294cf24b4ae944e844f865571ad26c6bfd..f7007bbbab69d6ea745f2a8ebad38fe841143f11 100644
--- a/source/dnode/mgmt/impl/test/sut/src/server.cpp
+++ b/source/dnode/mgmt/impl/test/sut/src/server.cpp
@@ -22,30 +22,28 @@ void* serverLoop(void* param) {
   }
 }
 
-SDnodeOpt TestServer::BuildOption(const char* path, const char* fqdn, uint16_t port, const char* firstEp) {
-  SDnodeOpt option = {0};
-  option.sver = 1;
-  option.numOfCores = 1;
-  option.numOfSupportVnodes = 16;
-  option.numOfCommitThreads = 1;
-  option.statusInterval = 1;
-  option.numOfThreadsPerCore = 1;
-  option.ratioOfQueryCores = 1;
-  option.maxShellConns = 1000;
-  option.shellActivityTimer = 30;
-  option.serverPort = port;
-  strcpy(option.dataDir, path);
-  snprintf(option.localEp, TSDB_EP_LEN, "%s:%u", fqdn, port);
-  snprintf(option.localFqdn, TSDB_FQDN_LEN, "%s", fqdn);
-  snprintf(option.firstEp, TSDB_EP_LEN, "%s", firstEp);
-  return option;
+SDnodeObjCfg TestServer::BuildOption(const char* path, const char* fqdn, uint16_t port, const char* firstEp) {
+  SDnodeObjCfg cfg = {0};
+  cfg.numOfSupportVnodes = 16;
+  cfg.numOfCommitThreads = 1;
+  cfg.statusInterval = 1;
+  cfg.numOfThreadsPerCore = 1;
+  cfg.ratioOfQueryCores = 1;
+  cfg.maxShellConns = 1000;
+  cfg.shellActivityTimer = 30;
+  cfg.serverPort = port;
+  strcpy(cfg.dataDir, path);
+  snprintf(cfg.localEp, TSDB_EP_LEN, "%s:%u", fqdn, port);
+  snprintf(cfg.localFqdn, TSDB_FQDN_LEN, "%s", fqdn);
+  snprintf(cfg.firstEp, TSDB_EP_LEN, "%s", firstEp);
+  return cfg;
 }
 
 bool TestServer::DoStart() {
-  SDnodeOpt option = BuildOption(path, fqdn, port, firstEp);
+  SDnodeObjCfg cfg = BuildOption(path, fqdn, port, firstEp);
   taosMkDir(path);
 
-  pDnode = dndInit(&option);
+  pDnode = dndCreate(&cfg);
   if (pDnode != NULL) {
     return false;
   }
@@ -81,7 +79,7 @@ void TestServer::Stop() {
   }
 
   if (pDnode != NULL) {
-    dndCleanup(pDnode);
+    dndClose(pDnode);
     pDnode = NULL;
   }
 }
diff --git a/source/dnode/mgmt/impl/test/sut/src/sut.cpp b/source/dnode/mgmt/impl/test/sut/src/sut.cpp
index ba530dbdd00f17ed47526c48ee5dfdffbcd1ead8..5912da5bdfa027dacbd1d27701eadcbfde78c532 100644
--- a/source/dnode/mgmt/impl/test/sut/src/sut.cpp
+++ b/source/dnode/mgmt/impl/test/sut/src/sut.cpp
@@ -43,6 +43,9 @@ void Testbase::InitLog(const char* path) {
 }
 
 void Testbase::Init(const char* path, int16_t port) {
+  SDnodeEnvCfg cfg = {0};
+  dndInit(&cfg);
+
   char fqdn[] = "localhost";
   char firstEp[TSDB_EP_LEN] = {0};
   snprintf(firstEp, TSDB_EP_LEN, "%s:%u", fqdn, port);
@@ -56,6 +59,7 @@ void Testbase::Init(const char* path, int16_t port) {
 void Testbase::Cleanup() {
   server.Stop();
   client.Cleanup();
+  dndCleanup();
 }
 
 void Testbase::Restart() { server.Restart(); }
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 3ea564722b12353f896d823e2d24947819519130..8294bca959242198af9838f31397011f23d202cd 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -80,6 +80,8 @@ TAOS_DEFINE_ERROR(TSDB_CODE_CHECKSUM_ERROR,               "Checksum error")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_MSG,                  "Invalid config message")
 TAOS_DEFINE_ERROR(TSDB_CODE_MSG_NOT_PROCESSED,            "Message not processed")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_PARA,                 "Invalid parameters")
+TAOS_DEFINE_ERROR(TSDB_CODE_REPEAT_INIT,                  "Repeat initialization")
+
 TAOS_DEFINE_ERROR(TSDB_CODE_REF_NO_MEMORY,                "Ref out of memory")
 TAOS_DEFINE_ERROR(TSDB_CODE_REF_FULL,                     "too many Ref Objs")
 TAOS_DEFINE_ERROR(TSDB_CODE_REF_ID_REMOVED,               "Ref ID is removed")