diff --git a/include/dnode/mnode/sdb/sdb.h b/include/dnode/mnode/sdb/sdb.h
index 8bd3db021773585fa1be0db6198bdbd3948888fd..a42736e4fb337b244d80486a7e8e0e3fa4a79652 100644
--- a/include/dnode/mnode/sdb/sdb.h
+++ b/include/dnode/mnode/sdb/sdb.h
@@ -125,8 +125,7 @@ typedef enum { SDB_KEY_BINARY = 1, SDB_KEY_INT32 = 2, SDB_KEY_INT64 = 3 } EKeyTy
 typedef enum {
   SDB_STATUS_CREATING = 1,
   SDB_STATUS_READY = 2,
-  SDB_STATUS_DROPPING = 3,
-  SDB_STATUS_DROPPED = 4
+  SDB_STATUS_DROPPED = 3
 } ESdbStatus;
 
 typedef enum {
@@ -258,7 +257,7 @@ int32_t sdbDeploy(SSdb *pSdb);
 int32_t sdbReadFile(SSdb *pSdb);
 
 /**
- * @brief Parse and write raw data to sdb.
+ * @brief Parse and write raw data to sdb, then free the pRaw object
  *
  * @param pSdb The sdb object.
  * @param pRaw The raw data.
@@ -266,6 +265,15 @@ int32_t sdbReadFile(SSdb *pSdb);
  */
 int32_t sdbWrite(SSdb *pSdb, SSdbRaw *pRaw);
 
+/**
+ * @brief Parse and write raw data to sdb.
+ *
+ * @param pSdb The sdb object.
+ * @param pRaw The raw data.
+ * @return int32_t 0 for success, -1 for failure.
+ */
+int32_t sdbWriteNotFree(SSdb *pSdb, SSdbRaw *pRaw);
+
 /**
  * @brief Acquire a row from sdb
  *
diff --git a/source/dnode/mgmt/impl/test/sut/deploy.cpp b/source/dnode/mgmt/impl/test/sut/deploy.cpp
index ad1667eac566ddf389fa4df0c6b656041f3439b2..92b0967345eb2a94f5f059e041c70abe704cccd7 100644
--- a/source/dnode/mgmt/impl/test/sut/deploy.cpp
+++ b/source/dnode/mgmt/impl/test/sut/deploy.cpp
@@ -34,7 +34,6 @@ void initLog(const char* path) {
   sDebugFlag = 0;
   tsdbDebugFlag = 0;
   cqDebugFlag = 0;
-  debugFlag = 0;
 
   char temp[PATH_MAX];
   snprintf(temp, PATH_MAX, "%s/taosdlog", path);
diff --git a/source/dnode/mgmt/impl/test/user/CMakeLists.txt b/source/dnode/mgmt/impl/test/user/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b5f02e41f4c594e353ce02b74f1feb42de205683
--- /dev/null
+++ b/source/dnode/mgmt/impl/test/user/CMakeLists.txt
@@ -0,0 +1,29 @@
+add_executable(dndTestUser "")
+
+target_sources(dndTestUser
+    PRIVATE
+    "user.cpp"
+    "../sut/deploy.cpp"
+)
+
+target_link_libraries(
+    dndTestUser
+    PUBLIC dnode
+    PUBLIC util
+    PUBLIC os
+    PUBLIC gtest_main
+)
+
+target_include_directories(dndTestUser
+    PUBLIC
+    "${CMAKE_SOURCE_DIR}/include/server/dnode/mgmt"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../../inc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../sut"
+)
+
+enable_testing()
+
+add_test(
+    NAME dndTestUser
+    COMMAND dndTestUser
+)
diff --git a/source/dnode/mgmt/impl/test/user/user.cpp b/source/dnode/mgmt/impl/test/user/user.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..befe005d559a4ccbed52d61848d42186f65a9c7b
--- /dev/null
+++ b/source/dnode/mgmt/impl/test/user/user.cpp
@@ -0,0 +1,310 @@
+/*
+ * 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 "deploy.h"
+
+class DndTestUser : public ::testing::Test {
+ protected:
+  void SetUp() override {}
+  void TearDown() override {}
+
+  static void SetUpTestSuite() {
+    const char* user = "root";
+    const char* pass = "taosdata";
+    const char* path = "/tmp/dndTestUser";
+    const char* fqdn = "localhost";
+    uint16_t    port = 9524;
+
+    pServer = createServer(path, fqdn, port);
+    ASSERT(pServer);
+    pClient = createClient(user, pass, fqdn, port);
+  }
+
+  static void TearDownTestSuite() {
+    dropServer(pServer);
+    dropClient(pClient);
+  }
+
+  static SServer* pServer;
+  static SClient* pClient;
+  static int32_t  connId;
+};
+
+SServer* DndTestUser::pServer;
+SClient* DndTestUser::pClient;
+int32_t  DndTestUser::connId;
+
+#if 0
+TEST_F(DndTestUser, ShowUser) {
+  int32_t showId = 0;
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  strcpy(pShow->db, "");
+
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  ASSERT_NE(pClient->pRsp, nullptr);
+
+  SShowRsp* pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  ASSERT_NE(pShowRsp, nullptr);
+  pShowRsp->showId = htonl(pShowRsp->showId);
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->contLen = htonl(pMeta->contLen);
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  pMeta->sversion = htons(pMeta->sversion);
+  pMeta->tversion = htons(pMeta->tversion);
+  pMeta->tid = htonl(pMeta->tid);
+  pMeta->uid = htobe64(pMeta->uid);
+  pMeta->suid = htobe64(pMeta->suid);
+
+  showId = pShowRsp->showId;
+
+  EXPECT_NE(pShowRsp->showId, 0);
+  EXPECT_EQ(pMeta->contLen, 0);
+  EXPECT_STREQ(pMeta->tableFname, "show users");
+  EXPECT_EQ(pMeta->numOfTags, 0);
+  EXPECT_EQ(pMeta->precision, 0);
+  EXPECT_EQ(pMeta->tableType, 0);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+  EXPECT_EQ(pMeta->sversion, 0);
+  EXPECT_EQ(pMeta->tversion, 0);
+  EXPECT_EQ(pMeta->tid, 0);
+  EXPECT_EQ(pMeta->uid, 0);
+  EXPECT_STREQ(pMeta->sTableName, "");
+  EXPECT_EQ(pMeta->suid, 0);
+
+  SSchema* pSchema = NULL;
+
+  pSchema = &pMeta->schema[0];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "name");
+
+  pSchema = &pMeta->schema[1];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, 10 + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "privilege");
+
+  pSchema = &pMeta->schema[2];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_TIMESTAMP);
+  EXPECT_EQ(pSchema->bytes, 8);
+  EXPECT_STREQ(pSchema->name, "create_time");
+
+  pSchema = &pMeta->schema[3];
+  pSchema->bytes = htons(pSchema->bytes);
+  EXPECT_EQ(pSchema->colId, 0);
+  EXPECT_EQ(pSchema->type, TSDB_DATA_TYPE_BINARY);
+  EXPECT_EQ(pSchema->bytes, TSDB_USER_LEN + VARSTR_HEADER_SIZE);
+  EXPECT_STREQ(pSchema->name, "account");
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = htonl(showId);
+  pRetrieve->free = 0;
+
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  ASSERT_NE(pClient->pRsp, nullptr);
+  ASSERT_EQ(pClient->pRsp->code, 0);
+
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  ASSERT_NE(pRetrieveRsp, nullptr);
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  pRetrieveRsp->offset = htobe64(pRetrieveRsp->offset);
+  pRetrieveRsp->useconds = htobe64(pRetrieveRsp->useconds);
+  pRetrieveRsp->compLen = htonl(pRetrieveRsp->compLen);
+
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 2);
+  EXPECT_EQ(pRetrieveRsp->offset, 0);
+  EXPECT_EQ(pRetrieveRsp->useconds, 0);
+  EXPECT_EQ(pRetrieveRsp->completed, 1);
+  EXPECT_EQ(pRetrieveRsp->precision, TSDB_TIME_PRECISION_MILLI);
+  EXPECT_EQ(pRetrieveRsp->compressed, 0);
+  EXPECT_EQ(pRetrieveRsp->reserved, 0);
+  EXPECT_EQ(pRetrieveRsp->compLen, 0);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+  int64_t int64Val = 0;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+
+  //--- privilege ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += 10;
+    EXPECT_STREQ(strVal, "super");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += 10;
+    EXPECT_STREQ(strVal, "writable");
+  }
+
+  //--- create_time ---
+  {
+    int64Val = *((int64_t*)(pData + pos));
+    pos += sizeof(int64_t);
+    EXPECT_GT(int64Val, 0);
+
+    int64Val = *((int64_t*)(pData + pos));
+    pos += sizeof(int64_t);
+    EXPECT_GT(int64Val, 0);
+  }
+
+  //--- account ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+  }
+}
+#endif
+
+TEST_F(DndTestUser, CreateUser_01) {
+  ASSERT_NE(pClient, nullptr);
+
+  //--- create user ---
+  SCreateUserMsg* pReq = (SCreateUserMsg*)rpcMallocCont(sizeof(SCreateUserMsg));
+  strcpy(pReq->user, "u1");
+  strcpy(pReq->pass, "p1");
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = sizeof(SCreateUserMsg);
+  rpcMsg.msgType = TSDB_MSG_TYPE_CREATE_USER;
+
+  sendMsg(pClient, &rpcMsg);
+  // taosMsleep(10000000);
+  SRpcMsg* pMsg = pClient->pRsp;
+  ASSERT_NE(pMsg, nullptr);
+  ASSERT_EQ(pMsg->code, 0);
+
+  //--- meta ---
+  SShowMsg* pShow = (SShowMsg*)rpcMallocCont(sizeof(SShowMsg));
+  pShow->type = TSDB_MGMT_TABLE_USER;
+  SRpcMsg showRpcMsg = {0};
+  showRpcMsg.pCont = pShow;
+  showRpcMsg.contLen = sizeof(SShowMsg);
+  showRpcMsg.msgType = TSDB_MSG_TYPE_SHOW;
+
+  sendMsg(pClient, &showRpcMsg);
+  SShowRsp*      pShowRsp = (SShowRsp*)pClient->pRsp->pCont;
+  STableMetaMsg* pMeta = &pShowRsp->tableMeta;
+  pMeta->numOfColumns = htons(pMeta->numOfColumns);
+  EXPECT_EQ(pMeta->numOfColumns, 4);
+
+  //--- retrieve ---
+  SRetrieveTableMsg* pRetrieve = (SRetrieveTableMsg*)rpcMallocCont(sizeof(SRetrieveTableMsg));
+  pRetrieve->showId = pShowRsp->showId;
+  SRpcMsg retrieveRpcMsg = {0};
+  retrieveRpcMsg.pCont = pRetrieve;
+  retrieveRpcMsg.contLen = sizeof(SRetrieveTableMsg);
+  retrieveRpcMsg.msgType = TSDB_MSG_TYPE_SHOW_RETRIEVE;
+
+  sendMsg(pClient, &retrieveRpcMsg);
+  SRetrieveTableRsp* pRetrieveRsp = (SRetrieveTableRsp*)pClient->pRsp->pCont;
+  pRetrieveRsp->numOfRows = htonl(pRetrieveRsp->numOfRows);
+  EXPECT_EQ(pRetrieveRsp->numOfRows, 3);
+
+  char*   pData = pRetrieveRsp->data;
+  int32_t pos = 0;
+  char*   strVal = NULL;
+
+  //--- name ---
+  {
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "u1");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "root");
+
+    pos += sizeof(VarDataLenT);
+    strVal = (char*)(pData + pos);
+    pos += TSDB_USER_LEN;
+    EXPECT_STREQ(strVal, "_root");
+  }
+}
+
+// TEST_F(DndTestUser, AlterUser) {
+//   ASSERT_NE(pClient, nullptr);
+
+//   SAlterUserMsg* pReq = (SAlterUserMsg*)rpcMallocCont(sizeof(SAlterUserMsg));
+
+//   SRpcMsg rpcMsg = {0};
+//   rpcMsg.pCont = pReq;
+//   rpcMsg.contLen = sizeof(SAlterUserMsg);
+//   rpcMsg.msgType = TSDB_MSG_TYPE_ALTER_ACCT;
+
+//   sendMsg(pClient, &rpcMsg);
+//   SRpcMsg* pMsg = pClient->pRsp;
+//   ASSERT_NE(pMsg, nullptr);
+//   ASSERT_EQ(pMsg->code, TSDB_CODE_MND_MSG_NOT_PROCESSED);
+// }
+
+// TEST_F(DndTestUser, DropUser) {
+//   ASSERT_NE(pClient, nullptr);
+
+//   SDropUserMsg* pReq = (SDropUserMsg*)rpcMallocCont(sizeof(SDropUserMsg));
+
+//   SRpcMsg rpcMsg = {0};
+//   rpcMsg.pCont = pReq;
+//   rpcMsg.contLen = sizeof(SDropUserMsg);
+//   rpcMsg.msgType = TSDB_MSG_TYPE_DROP_ACCT;
+
+//   sendMsg(pClient, &rpcMsg);
+//   SRpcMsg* pMsg = pClient->pRsp;
+//   ASSERT_NE(pMsg, nullptr);
+//   ASSERT_EQ(pMsg->code, TSDB_CODE_MND_MSG_NOT_PROCESSED);
+// }
diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 9e4f9225408fcc9429d74c5f19007e2cb8d92659..cb5c0c27554a3ecbcf82246a935c52f7ebe119a7 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -318,6 +318,11 @@ typedef struct SMnodeMsg {
   void   *pCont;
 } SMnodeMsg;
 
+typedef struct {
+  int32_t id;
+  void   *rpcHandle;
+} STransMsg;
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/dnode/mnode/impl/inc/mndSync.h b/source/dnode/mnode/impl/inc/mndSync.h
index 3e45b0adb13658d11d3bf467d727cef02dd0afbb..02ba725be14c0de214d767c2e97b6c42e7727f5d 100644
--- a/source/dnode/mnode/impl/inc/mndSync.h
+++ b/source/dnode/mnode/impl/inc/mndSync.h
@@ -25,7 +25,7 @@ extern "C" {
 int32_t mndInitSync(SMnode *pMnode);
 void    mndCleanupSync(SMnode *pMnode);
 bool    mndIsMaster(SMnode *pMnode);
-int32_t mndSyncPropose(SSdbRaw *pRaw, void *pData);
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mnode/impl/inc/mndTrans.h b/source/dnode/mnode/impl/inc/mndTrans.h
index 9559a9625558be2adad19e0177ddd5ebbf6bde60..878337e4be7c10564f9f7f7d7941e526c3a73239 100644
--- a/source/dnode/mnode/impl/inc/mndTrans.h
+++ b/source/dnode/mnode/impl/inc/mndTrans.h
@@ -33,13 +33,10 @@ int32_t mndTransAppendCommitlog(STrans *pTrans, SSdbRaw *pRaw);
 int32_t mndTransAppendRedoAction(STrans *pTrans, SEpSet *, void *pMsg);
 int32_t mndTransAppendUndoAction(STrans *pTrans, SEpSet *, void *pMsg);
 
-int32_t mndTransPrepare(STrans *pTrans, int32_t (*syncfp)(SSdbRaw *pRaw, void *pData));
-int32_t mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, void *pData, int32_t code);
+int32_t mndTransPrepare(STrans *pTrans);
+void    mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg, int32_t code);
 int32_t mndTransExecute(SSdb *pSdb, int32_t tranId);
 
-SSdbRaw *mndTransActionEncode(STrans *pTrans);
-SSdbRow *mndTransActionDecode(SSdbRaw *pRaw);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/dnode/mnode/impl/src/mndAcct.c b/source/dnode/mnode/impl/src/mndAcct.c
index e3d37cd9f9fe326144a3594bb705b16c7fb78dab..3d668a76f8373fa019f4af41d2e54bb5d26369fb 100644
--- a/source/dnode/mnode/impl/src/mndAcct.c
+++ b/source/dnode/mnode/impl/src/mndAcct.c
@@ -65,7 +65,7 @@ static int32_t mnodeCreateDefaultAcct(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("acct:%s, will be created while deploy sdb", acctObj.acct);
+  mDebug("acct:%s, will be created while deploy sdb", acctObj.acct);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
@@ -132,14 +132,14 @@ static int32_t mnodeAcctActionDelete(SSdb *pSdb, SAcctObj *pAcct) {
 }
 
 static int32_t mnodeAcctActionUpdate(SSdb *pSdb, SAcctObj *pSrcAcct, SAcctObj *pDstAcct) {
-  mTrace("acct:%s, perform update action", pSrcAcct->acct);
-
-  memcpy(pSrcAcct->acct, pDstAcct->acct, TSDB_USER_LEN);
-  pSrcAcct->createdTime = pDstAcct->createdTime;
-  pSrcAcct->updateTime = pDstAcct->updateTime;
-  pSrcAcct->acctId = pDstAcct->acctId;
-  pSrcAcct->status = pDstAcct->status;
-  pSrcAcct->cfg = pDstAcct->cfg;
+  mTrace("acct:%s, perform update action", pDstAcct->acct);
+
+  memcpy(pDstAcct->acct, pSrcAcct->acct, TSDB_USER_LEN);
+  pDstAcct->createdTime = pSrcAcct->createdTime;
+  pDstAcct->updateTime = pSrcAcct->updateTime;
+  pDstAcct->acctId = pSrcAcct->acctId;
+  pDstAcct->status = pSrcAcct->status;
+  pDstAcct->cfg = pSrcAcct->cfg;
   return 0;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndCluster.c b/source/dnode/mnode/impl/src/mndCluster.c
index 9fa7a066306308af24db8f31e7371349cf596696..f260c83538c3ff04be3bdb81fcda878fa0c381be 100644
--- a/source/dnode/mnode/impl/src/mndCluster.c
+++ b/source/dnode/mnode/impl/src/mndCluster.c
@@ -108,7 +108,7 @@ static int32_t mndClusterActionDelete(SSdb *pSdb, SClusterObj *pCluster) {
 }
 
 static int32_t mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pSrcCluster, SClusterObj *pDstCluster) {
-  mTrace("cluster:%d, perform update action", pSrcCluster->id);
+  mTrace("cluster:%d, perform update action", pDstCluster->id);
   return 0;
 }
 
@@ -132,7 +132,7 @@ static int32_t mndCreateDefaultCluster(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("cluster:%d, will be created while deploy sdb", clusterObj.id);
+  mDebug("cluster:%d, will be created while deploy sdb", clusterObj.id);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index 241b006293000a47eaf5650b52a692910e550540..356b3073bf5a1b03b03e6c44dfbf14cbecddb12c 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -102,12 +102,12 @@ static int32_t mndDnodeActionDelete(SSdb *pSdb, SDnodeObj *pDnode) {
 }
 
 static int32_t mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pSrcDnode, SDnodeObj *pDstDnode) {
-  mTrace("dnode:%d, perform update action", pSrcDnode->id);
-  pSrcDnode->id = pDstDnode->id;
-  pSrcDnode->createdTime = pDstDnode->createdTime;
-  pSrcDnode->updateTime = pDstDnode->updateTime;
-  pSrcDnode->port = pDstDnode->port;
-  memcpy(pSrcDnode->fqdn, pDstDnode->fqdn, TSDB_FQDN_LEN); 
+  mTrace("dnode:%d, perform update action", pDstDnode->id);
+  pDstDnode->id = pSrcDnode->id;
+  pDstDnode->createdTime = pSrcDnode->createdTime;
+  pDstDnode->updateTime = pSrcDnode->updateTime;
+  pDstDnode->port = pSrcDnode->port;
+  memcpy(pDstDnode->fqdn, pSrcDnode->fqdn, TSDB_FQDN_LEN); 
   return 0;
 }
 
@@ -123,7 +123,7 @@ static int32_t mndCreateDefaultDnode(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("dnode:%d, will be created while deploy sdb", dnodeObj.id);
+  mDebug("dnode:%d, will be created while deploy sdb", dnodeObj.id);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
diff --git a/source/dnode/mnode/impl/src/mndMnode.c b/source/dnode/mnode/impl/src/mndMnode.c
index eabcce04c5ca84f10aa0fda10c9e986af80ebabc..6fa55bb9f1caff3d2f4546b5e893710a518933b9 100644
--- a/source/dnode/mnode/impl/src/mndMnode.c
+++ b/source/dnode/mnode/impl/src/mndMnode.c
@@ -82,10 +82,10 @@ static int32_t mndMnodeActionDelete(SSdb *pSdb, SMnodeObj *pMnodeObj) {
 }
 
 static int32_t mndMnodeActionUpdate(SSdb *pSdb, SMnodeObj *pSrcMnode, SMnodeObj *pDstMnode) {
-  mTrace("mnode:%d, perform update action", pSrcMnode->id);
-  pSrcMnode->id = pDstMnode->id;
-  pSrcMnode->createdTime = pDstMnode->createdTime;
-  pSrcMnode->updateTime = pDstMnode->updateTime;
+  mTrace("mnode:%d, perform update action", pDstMnode->id);
+  pDstMnode->id = pSrcMnode->id;
+  pDstMnode->createdTime = pSrcMnode->createdTime;
+  pDstMnode->updateTime = pSrcMnode->updateTime;
   return 0;
 }
 
@@ -99,7 +99,7 @@ static int32_t mndCreateDefaultMnode(SMnode *pMnode) {
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("mnode:%d, will be created while deploy sdb", mnodeObj.id);
+  mDebug("mnode:%d, will be created while deploy sdb", mnodeObj.id);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
diff --git a/source/dnode/mnode/impl/src/mndSync.c b/source/dnode/mnode/impl/src/mndSync.c
index 723191531180db0a5b18799538ab3e3023d26fca..6e7ee662f8de514ff886ef0f8493969f9a919ebe 100644
--- a/source/dnode/mnode/impl/src/mndSync.c
+++ b/source/dnode/mnode/impl/src/mndSync.c
@@ -21,9 +21,15 @@
 int32_t mndInitSync(SMnode *pMnode) { return 0; }
 void    mndCleanupSync(SMnode *pMnode) {}
 
-int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, void *pData) {
-  mndTransApply(pMnode, pData, pData, 0);
-  free(pData);
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg) {
+  int32_t code = 0;
+
+  int32_t  len = sdbGetRawTotalSize(pRaw);
+  SSdbRaw *pReceived = calloc(1, len);
+  memcpy(pReceived, pRaw, len);
+  mDebug("trans:%d, data:%p recv from sync, code:0x%x pMsg:%p", pMsg->id, pReceived, code & 0xFFFF, pMsg);
+
+  mndTransApply(pMnode, pReceived, pMsg, code);
   return 0;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndTelem.c b/source/dnode/mnode/impl/src/mndTelem.c
index 663ae76506c39a459f856f8479e0dc252083b8dd..5beb1b10e36bc954b9283113b91cf7ca4ab4aa01 100644
--- a/source/dnode/mnode/impl/src/mndTelem.c
+++ b/source/dnode/mnode/impl/src/mndTelem.c
@@ -189,12 +189,12 @@ static void mndSendTelemetryReport(SMnode* pMnode) {
   char     buf[128] = {0};
   uint32_t ip = taosGetIpv4FromFqdn(TELEMETRY_SERVER);
   if (ip == 0xffffffff) {
-    mTrace("failed to get IP address of " TELEMETRY_SERVER " since :%s", strerror(errno));
+    mDebug("failed to get IP address of " TELEMETRY_SERVER " since :%s", strerror(errno));
     return;
   }
   SOCKET fd = taosOpenTcpClientSocket(ip, TELEMETRY_PORT, 0);
   if (fd < 0) {
-    mTrace("failed to create socket for telemetry, reason:%s", strerror(errno));
+    mDebug("failed to create socket for telemetry, reason:%s", strerror(errno));
     return;
   }
 
@@ -228,7 +228,7 @@ static void mndSendTelemetryReport(SMnode* pMnode) {
 
   // read something to avoid nginx error 499
   if (taosReadSocket(fd, buf, 10) < 0) {
-    mTrace("failed to receive response since %s", strerror(errno));
+    mDebug("failed to receive response since %s", strerror(errno));
   }
 
   taosCloseSocket(fd);
@@ -297,7 +297,7 @@ int32_t mndInitTelem(SMnode* pMnode) {
   int32_t code = pthread_create(&pMgmt->thread, &attr, mndTelemThreadFp, pMnode);
   pthread_attr_destroy(&attr);
   if (code != 0) {
-    mTrace("failed to create telemetry thread since :%s", strerror(code));
+    mDebug("failed to create telemetry thread since :%s", strerror(code));
   }
 
   mInfo("mnd telemetry is initialized");
diff --git a/source/dnode/mnode/impl/src/mndTrans.c b/source/dnode/mnode/impl/src/mndTrans.c
index 7eab16895cc8281624bf1484c69f8c0260a0f9d1..8d1521c79a8885ce0f1715bf79d280f69ddb6eaf 100644
--- a/source/dnode/mnode/impl/src/mndTrans.c
+++ b/source/dnode/mnode/impl/src/mndTrans.c
@@ -15,13 +15,33 @@
 
 #define _DEFAULT_SOURCE
 #include "mndTrans.h"
-#include "trpc.h"
+#include "mndSync.h"
 
 #define SDB_TRANS_VER 1
 #define TRN_DEFAULT_ARRAY_SIZE 8
 
-SSdbRaw *mndTransActionEncode(STrans *pTrans) {
-  int32_t rawDataLen = 10 * sizeof(int32_t);
+static SSdbRaw *mndTransActionEncode(STrans *pTrans);
+static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw);
+static int32_t  mndTransActionInsert(SSdb *pSdb, STrans *pTrans);
+static int32_t  mndTransActionUpdate(SSdb *pSdb, STrans *pTrans, STrans *pDstTrans);
+static int32_t  mndTransActionDelete(SSdb *pSdb, STrans *pTrans);
+
+int32_t mndInitTrans(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_TRANS,
+                     .keyType = SDB_KEY_INT32,
+                     .encodeFp = (SdbEncodeFp)mndTransActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndTransActionDecode,
+                     .insertFp = (SdbInsertFp)mndTransActionInsert,
+                     .updateFp = (SdbUpdateFp)mndTransActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndTransActionDelete};
+
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupTrans(SMnode *pMnode) {}
+
+static SSdbRaw *mndTransActionEncode(STrans *pTrans) {
+  int32_t rawDataLen = 16 * sizeof(int32_t);
   int32_t redoLogNum = taosArrayGetSize(pTrans->redoLogs);
   int32_t undoLogNum = taosArrayGetSize(pTrans->undoLogs);
   int32_t commitLogNum = taosArrayGetSize(pTrans->commitLogs);
@@ -29,23 +49,23 @@ SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   int32_t undoActionNum = taosArrayGetSize(pTrans->undoActions);
 
   for (int32_t i = 0; i < redoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->redoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->redoLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   for (int32_t i = 0; i < undoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->undoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->undoLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   for (int32_t i = 0; i < commitLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->commitLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->commitLogs, i);
     rawDataLen += sdbGetRawTotalSize(pTmp);
   }
 
   SSdbRaw *pRaw = sdbAllocRaw(SDB_TRANS, SDB_TRANS_VER, rawDataLen);
   if (pRaw == NULL) {
-    mError("trn:%d, failed to alloc raw since %s", pTrans->id, terrstr());
+    mError("trans:%d, failed to alloc raw since %s", pTrans->id, terrstr());
     return NULL;
   }
 
@@ -60,31 +80,33 @@ SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   SDB_SET_INT32(pRaw, dataPos, undoActionNum)
 
   for (int32_t i = 0; i < redoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->redoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->redoLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
   for (int32_t i = 0; i < undoLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->undoLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->undoLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
   for (int32_t i = 0; i < commitLogNum; ++i) {
-    SSdbRaw *pTmp = taosArrayGet(pTrans->commitLogs, i);
+    SSdbRaw *pTmp = taosArrayGetP(pTrans->commitLogs, i);
     int32_t  len = sdbGetRawTotalSize(pTmp);
     SDB_SET_INT32(pRaw, dataPos, len)
     SDB_SET_BINARY(pRaw, dataPos, (void *)pTmp, len)
   }
 
-  mDebug("trn:%d, is encoded as raw:%p, len:%d", pTrans->id, pRaw, dataPos);
+  mTrace("trans:%d, encode to raw:%p, len:%d", pTrans->id, pRaw, dataPos);
   return pRaw;
 }
 
-SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
+static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
+  int32_t code = 0;
+
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) {
     mError("failed to get soft ver from raw:%p since %s", pRaw, terrstr());
@@ -97,8 +119,8 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
     return NULL;
   }
 
-  SSdbRow   *pRow = sdbAllocRow(sizeof(STrans));
-  STrans *pTrans = sdbGetRowObj(pRow);
+  SSdbRow *pRow = sdbAllocRow(sizeof(STrans));
+  STrans  *pTrans = sdbGetRowObj(pRow);
   if (pTrans == NULL) {
     mError("failed to alloc trans from raw:%p since %s", pRaw, terrstr());
     return NULL;
@@ -112,9 +134,9 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
 
   if (pTrans->redoLogs == NULL || pTrans->undoLogs == NULL || pTrans->commitLogs == NULL ||
       pTrans->redoActions == NULL || pTrans->undoActions == NULL) {
-    terrno = TSDB_CODE_OUT_OF_MEMORY;
-    mDebug("trn:%d, failed to create array while parsed from raw:%p", pTrans->id, pRaw);
-    return NULL;
+    mDebug("trans:%d, failed to create array while parsed from raw:%p", pTrans->id, pRaw);
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto TRANS_DECODE_OVER;
   }
 
   int32_t redoLogNum = 0;
@@ -133,81 +155,111 @@ SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
   SDB_GET_INT32(pRaw, pRow, dataPos, &redoActionNum)
   SDB_GET_INT32(pRaw, pRow, dataPos, &undoActionNum)
 
-  int32_t code = 0;
   for (int32_t i = 0; i < redoLogNum; ++i) {
     int32_t dataLen = 0;
     SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
 
     char *pData = malloc(dataLen);
     SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
-    void *ret = taosArrayPush(pTrans->redoLogs, pData);
+    void *ret = taosArrayPush(pTrans->redoLogs, &pData);
+    if (ret == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
+      break;
+    }
+  }
+
+  for (int32_t i = 0; i < undoLogNum; ++i) {
+    int32_t dataLen = 0;
+    SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
+
+    char *pData = malloc(dataLen);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
+    void *ret = taosArrayPush(pTrans->undoLogs, &pData);
+    if (ret == NULL) {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
+      break;
+    }
+  }
+
+  for (int32_t i = 0; i < commitLogNum; ++i) {
+    int32_t dataLen = 0;
+    SDB_GET_INT32(pRaw, pRow, dataPos, &dataLen)
+
+    char *pData = malloc(dataLen);
+    SDB_GET_BINARY(pRaw, pRow, dataPos, pData, dataLen);
+    void *ret = taosArrayPush(pTrans->commitLogs, &pData);
     if (ret == NULL) {
       code = TSDB_CODE_OUT_OF_MEMORY;
+      goto TRANS_DECODE_OVER;
       break;
     }
   }
 
+TRANS_DECODE_OVER:
   if (code != 0) {
-    terrno = code;
-    mError("trn:%d, failed to parse from raw:%p since %s", pTrans->id, pRaw, terrstr());
+    mError("trans:%d, failed to parse from raw:%p since %s", pTrans->id, pRaw, tstrerror(errno));
     mndTransDrop(pTrans);
+    terrno = code;
     return NULL;
   }
 
-  mDebug("trn:%d, is parsed from raw:%p", pTrans->id, pRaw);
+  mTrace("trans:%d, decode from raw:%p", pTrans->id, pRaw);
   return pRow;
 }
 
 static int32_t mndTransActionInsert(SSdb *pSdb, STrans *pTrans) {
+  mTrace("trans:%d, perform insert action, stage:%d", pTrans->id, pTrans->stage);
+
   SArray *pArray = pTrans->redoLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
       return code;
     }
   }
-
-  mDebug("trn:%d, write to sdb", pTrans->id);
   return 0;
 }
 
 static int32_t mndTransActionDelete(SSdb *pSdb, STrans *pTrans) {
-  SArray *pArray = pTrans->redoLogs;
+  mTrace("trans:%d, perform delete action, stage:%d", pTrans->id, pTrans->stage);
+
+  SArray *pArray = pTrans->undoLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
       return code;
     }
   }
 
-  mDebug("trn:%d, delete from sdb", pTrans->id);
   return 0;
 }
 
 static int32_t mndTransActionUpdate(SSdb *pSdb, STrans *pTrans, STrans *pDstTrans) {
-  assert(true);
-  SArray *pArray = pTrans->redoLogs;
+  mTrace("trans:%d, perform update action, stage:%d", pTrans->id, pTrans->stage);
+
+  SArray *pArray = pDstTrans->commitLogs;
   int32_t arraySize = taosArrayGetSize(pArray);
 
   for (int32_t i = 0; i < arraySize; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     int32_t  code = sdbWrite(pSdb, pRaw);
     if (code != 0) {
-      mError("trn:%d, failed to write raw:%p to sdb since %s", pTrans->id, pRaw, terrstr());
+      mError("trans:%d, failed to write raw:%p to sdb since %s", pDstTrans->id, pRaw, terrstr());
       return code;
     }
   }
 
-  pTrans->stage = pDstTrans->stage;
-  mDebug("trn:%d, update in sdb", pTrans->id);
+  pDstTrans->stage = pTrans->stage;
   return 0;
 }
 
@@ -224,6 +276,7 @@ STrans *mndTransCreate(SMnode *pMnode, ETrnPolicy policy, void *rpcHandle) {
   pTrans->id = trnGenerateTransId();
   pTrans->stage = TRN_STAGE_PREPARE;
   pTrans->policy = policy;
+  pTrans->pMnode = pMnode;
   pTrans->rpcHandle = rpcHandle;
   pTrans->redoLogs = taosArrayInit(TRN_DEFAULT_ARRAY_SIZE, sizeof(void *));
   pTrans->undoLogs = taosArrayInit(TRN_DEFAULT_ARRAY_SIZE, sizeof(void *));
@@ -238,13 +291,13 @@ STrans *mndTransCreate(SMnode *pMnode, ETrnPolicy policy, void *rpcHandle) {
     return NULL;
   }
 
-  mDebug("trn:%d, is created, %p", pTrans->id, pTrans);
+  mDebug("trans:%d, data:%p is created", pTrans->id, pTrans);
   return pTrans;
 }
 
 static void trnDropArray(SArray *pArray) {
   for (int32_t i = 0; i < pArray->size; ++i) {
-    SSdbRaw *pRaw = taosArrayGet(pArray, i);
+    SSdbRaw *pRaw = taosArrayGetP(pArray, i);
     tfree(pRaw);
   }
 
@@ -258,13 +311,13 @@ void mndTransDrop(STrans *pTrans) {
   trnDropArray(pTrans->redoActions);
   trnDropArray(pTrans->undoActions);
 
-  mDebug("trn:%d, is dropped, %p", pTrans->id, pTrans);
+  mDebug("trans:%d, data:%p is dropped", pTrans->id, pTrans);
   tfree(pTrans);
 }
 
 void mndTransSetRpcHandle(STrans *pTrans, void *rpcHandle) {
   pTrans->rpcHandle = rpcHandle;
-  mTrace("trn:%d, set rpc handle:%p", pTrans->id, rpcHandle);
+  mTrace("trans:%d, set rpc handle:%p", pTrans->id, rpcHandle);
 }
 
 static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
@@ -273,7 +326,7 @@ static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
     return -1;
   }
 
-  void *ptr = taosArrayPush(pArray, pRaw);
+  void *ptr = taosArrayPush(pArray, &pRaw);
   if (ptr == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return -1;
@@ -284,92 +337,92 @@ static int32_t mndTransAppendArray(SArray *pArray, SSdbRaw *pRaw) {
 
 int32_t mndTransAppendRedolog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->redoLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to redo logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to redo logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendUndolog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->undoLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to undo logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to undo logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendCommitlog(STrans *pTrans, SSdbRaw *pRaw) {
   int32_t code = mndTransAppendArray(pTrans->commitLogs, pRaw);
-  mTrace("trn:%d, raw:%p append to commit logs, code:%d", pTrans->id, pRaw, code);
+  mTrace("trans:%d, raw:%p append to commit logs, code:%d", pTrans->id, pRaw, code);
   return code;
 }
 
 int32_t mndTransAppendRedoAction(STrans *pTrans, SEpSet *pEpSet, void *pMsg) {
   int32_t code = mndTransAppendArray(pTrans->redoActions, pMsg);
-  mTrace("trn:%d, msg:%p append to redo actions", pTrans->id, pMsg);
+  mTrace("trans:%d, msg:%p append to redo actions", pTrans->id, pMsg);
   return code;
 }
 
 int32_t mndTransAppendUndoAction(STrans *pTrans, SEpSet *pEpSet, void *pMsg) {
   int32_t code = mndTransAppendArray(pTrans->undoActions, pMsg);
-  mTrace("trn:%d, msg:%p append to undo actions", pTrans->id, pMsg);
+  mTrace("trans:%d, msg:%p append to undo actions", pTrans->id, pMsg);
   return code;
 }
 
-int32_t mndInitTrans(SMnode *pMnode) {
-  SSdbTable table = {.sdbType = SDB_TRANS,
-                     .keyType = SDB_KEY_INT32,
-                     .encodeFp = (SdbEncodeFp)mndTransActionEncode,
-                     .decodeFp = (SdbDecodeFp)mndTransActionDecode,
-                     .insertFp = (SdbInsertFp)mndTransActionInsert,
-                     .updateFp = (SdbUpdateFp)mndTransActionUpdate,
-                     .deleteFp = (SdbDeleteFp)mndTransActionDelete};
-
-  return sdbSetTable(pMnode->pSdb, table);
-}
-
-void mndCleanupTrans(SMnode *pMnode) {}
-
-int32_t mndTransPrepare(STrans *pTrans, int32_t (*syncfp)(SSdbRaw *pRaw, void *pData)) {
-  if (syncfp == NULL) return -1;
+int32_t mndTransPrepare(STrans *pTrans) {
+  mDebug("trans:%d, prepare transaction", pTrans->id);
 
   SSdbRaw *pRaw = mndTransActionEncode(pTrans);
   if (pRaw == NULL) {
-    mError("trn:%d, failed to decode trans since %s", pTrans->id, terrstr());
+    mError("trans:%d, failed to decode trans since %s", pTrans->id, terrstr());
     return -1;
   }
   sdbSetRawStatus(pRaw, SDB_STATUS_CREATING);
 
-  if (sdbWrite(pTrans->pMnode->pSdb, pRaw) != 0) {
-    mError("trn:%d, failed to write trans since %s", pTrans->id, terrstr());
+  if (sdbWriteNotFree(pTrans->pMnode->pSdb, pRaw) != 0) {
+    mError("trans:%d, failed to write trans since %s", pTrans->id, terrstr());
     return -1;
   }
 
-  if ((*syncfp)(pRaw, pTrans->rpcHandle) != 0) {
-    mError("trn:%d, failed to sync trans since %s", pTrans->id, terrstr());
+  STransMsg *pMsg = calloc(1, sizeof(STransMsg));
+  pMsg->id = pTrans->id;
+  pMsg->rpcHandle = pTrans->rpcHandle;
+
+  mDebug("trans:%d, start sync, RPC:%p pMsg:%p", pTrans->id, pTrans->rpcHandle, pMsg);
+  if (mndSyncPropose(pTrans->pMnode, pRaw, pMsg) != 0) {
+    mError("trans:%d, failed to sync since %s", pTrans->id, terrstr());
+    free(pMsg);
+    sdbFreeRaw(pRaw);
     return -1;
   }
 
+  sdbFreeRaw(pRaw);
   return 0;
 }
 
-static void trnSendRpcRsp(void *rpcHandle, int32_t code) {
-  if (rpcHandle != NULL) {
-    SRpcMsg rspMsg = {.handle = rpcHandle, .code = terrno};
+static void trnSendRpcRsp(STransMsg *pMsg, int32_t code) {
+  mDebug("trans:%d, send rpc rsp, RPC:%p code:0x%x pMsg:%p", pMsg->id, pMsg->rpcHandle, code & 0xFFFF, pMsg);
+  if (pMsg->rpcHandle != NULL) {
+    SRpcMsg rspMsg = {.handle = pMsg->rpcHandle, .code = code};
     rpcSendResponse(&rspMsg);
   }
-}
 
-int32_t mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, void *pData, int32_t code) {
-  if (code != 0) {
-    trnSendRpcRsp(pData, terrno);
-    return 0;
-  }
+  free(pMsg);
+}
 
-  if (sdbWrite(pMnode->pSdb, pData) != 0) {
-    code = terrno;
-    trnSendRpcRsp(pData, code);
-    terrno = code;
-    return -1;
+void mndTransApply(SMnode *pMnode, SSdbRaw *pRaw, STransMsg *pMsg, int32_t code) {
+  if (code == 0) {
+    mDebug("trans:%d, commit transaction", pMsg->id);
+    sdbSetRawStatus(pRaw, SDB_STATUS_READY);
+    if (sdbWrite(pMnode->pSdb, pRaw) != 0) {
+      code = terrno;
+      mError("trans:%d, failed to write sdb while commit since %s", pMsg->id, terrstr());
+    }
+    trnSendRpcRsp(pMsg, code);
+  } else {
+    mDebug("trans:%d, rollback transaction", pMsg->id);
+    sdbSetRawStatus(pRaw, SDB_STATUS_DROPPED);
+    if (sdbWrite(pMnode->pSdb, pRaw) != 0) {
+      mError("trans:%d, failed to write sdb while rollback since %s", pMsg->id, terrstr());
+    }
+    trnSendRpcRsp(pMsg, code);
   }
-
-  return 0;
 }
 
 static int32_t trnExecuteArray(SMnode *pMnode, SArray *pArray) {
diff --git a/source/dnode/mnode/impl/src/mndUser.c b/source/dnode/mnode/impl/src/mndUser.c
index a3dd2555778fccb768f08c24566a3ac41c179718..13baee4b54155ced1bd20b10b2be2c18a038e505 100644
--- a/source/dnode/mnode/impl/src/mndUser.c
+++ b/source/dnode/mnode/impl/src/mndUser.c
@@ -32,6 +32,9 @@ static int32_t  mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass
 static int32_t  mndProcessCreateUserMsg(SMnodeMsg *pMsg);
 static int32_t  mndProcessAlterUserMsg(SMnodeMsg *pMsg);
 static int32_t  mndProcessDropUserMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveUsers(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextUser(SMnode *pMnode, void *pIter);
 
 int32_t mndInitUser(SMnode *pMnode) {
   SSdbTable table = {.sdbType = SDB_USER,
@@ -47,6 +50,9 @@ int32_t mndInitUser(SMnode *pMnode) {
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_ALTER_USER, mndProcessAlterUserMsg);
   mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_USER, mndProcessDropUserMsg);
 
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_USER, mndGetUserMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_USER, mndRetrieveUsers);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_USER, mndCancelGetNextUser);
   return sdbSetTable(pMnode->pSdb, table);
 }
 
@@ -70,7 +76,7 @@ static int32_t mndCreateDefaultUser(SMnode *pMnode, char *acct, char *user, char
   if (pRaw == NULL) return -1;
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
-  mTrace("user:%s, will be created while deploy sdb", userObj.user);
+  mDebug("user:%s, will be created while deploy sdb", userObj.user);
   return sdbWrite(pMnode->pSdb, pRaw);
 }
 
@@ -164,14 +170,14 @@ static int32_t mndUserActionDelete(SSdb *pSdb, SUserObj *pUser) {
 
 static int32_t mndUserActionUpdate(SSdb *pSdb, SUserObj *pSrcUser, SUserObj *pDstUser) {
   mTrace("user:%s, perform update action", pSrcUser->user);
-  memcpy(pSrcUser->user, pDstUser->user, TSDB_USER_LEN);
-  memcpy(pSrcUser->pass, pDstUser->pass, TSDB_KEY_LEN);
-  memcpy(pSrcUser->acct, pDstUser->acct, TSDB_USER_LEN);
-  pSrcUser->createdTime = pDstUser->createdTime;
-  pSrcUser->updateTime = pDstUser->updateTime;
-  pSrcUser->superAuth = pDstUser->superAuth;
-  pSrcUser->readAuth = pDstUser->readAuth;
-  pSrcUser->writeAuth = pDstUser->writeAuth;
+  memcpy(pDstUser->user, pSrcUser->user, TSDB_USER_LEN);
+  memcpy(pDstUser->pass, pSrcUser->pass, TSDB_KEY_LEN);
+  memcpy(pDstUser->acct, pSrcUser->acct, TSDB_USER_LEN);
+  pDstUser->createdTime = pSrcUser->createdTime;
+  pDstUser->updateTime = pSrcUser->updateTime;
+  pDstUser->superAuth = pSrcUser->superAuth;
+  pDstUser->readAuth = pSrcUser->readAuth;
+  pDstUser->writeAuth = pSrcUser->writeAuth;
   return 0;
 }
 
@@ -197,11 +203,15 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
   userObj.writeAuth = 1;
 
   STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
-  if (pTrans == NULL) return -1;
+  if (pTrans == NULL) {
+    mError("user:%s, failed to create since %s", user, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to create user:%s", pTrans->id, user);
 
   SSdbRaw *pRedoRaw = mndUserActionEncode(&userObj);
   if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
-    mError("failed to append redo log since %s", terrstr());
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -209,7 +219,7 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
 
   SSdbRaw *pUndoRaw = mndUserActionEncode(&userObj);
   if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
-    mError("failed to append undo log since %s", terrstr());
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -217,13 +227,14 @@ static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass,
 
   SSdbRaw *pCommitRaw = mndUserActionEncode(&userObj);
   if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
-    mError("failed to append commit log since %s", terrstr());
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
   sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
 
-  if (mndTransPrepare(pTrans, mndSyncPropose) != 0) {
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;
   }
@@ -236,6 +247,8 @@ static int32_t mndProcessCreateUserMsg(SMnodeMsg *pMsg) {
   SMnode         *pMnode = pMsg->pMnode;
   SCreateUserMsg *pCreate = pMsg->rpcMsg.pCont;
 
+  mDebug("user:%s, start to create", pCreate->user);
+
   if (pCreate->user[0] == 0) {
     terrno = TSDB_CODE_MND_INVALID_USER_FORMAT;
     mError("user:%s, failed to create since %s", pCreate->user, terrstr());
@@ -284,4 +297,102 @@ static int32_t mndProcessDropUserMsg(SMnodeMsg *pMsg) {
   terrno = TSDB_CODE_MND_MSG_NOT_PROCESSED;
   mError("failed to process drop user msg since %s", terrstr());
   return -1;
+}
+
+static int32_t mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = TSDB_USER_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 10 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "privilege");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create_time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_USER_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "account");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  strcpy(pMeta->tableFname, "show users");
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_USER);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  return 0;
+}
+
+static int32_t mndRetrieveUsers(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode   *pMnode = pMsg->pMnode;
+  SSdb     *pSdb = pMnode->pSdb;
+  int32_t   numOfRows = 0;
+  SUserObj *pUser = NULL;
+  int32_t   cols = 0;
+  char     *pWrite;
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_USER, pShow->pIter, (void **)&pUser);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pUser->user, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    if (pUser->superAuth) {
+      const char *src = "super";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    } else if (pUser->writeAuth) {
+      const char *src = "writable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    } else {
+      const char *src = "readable";
+      STR_WITH_SIZE_TO_VARSTR(pWrite, src, strlen(src));
+    }
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pUser->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pUser->acct, pShow->bytes[cols]);
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pUser);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextUser(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
 }
\ No newline at end of file
diff --git a/source/dnode/mnode/impl/src/mnode.c b/source/dnode/mnode/impl/src/mnode.c
index 2fa0838ee802b788d0172662a208651c1db931e9..9ffe8968aef6f18ef2b0be6a2796200ab7ab4eb8 100644
--- a/source/dnode/mnode/impl/src/mnode.c
+++ b/source/dnode/mnode/impl/src/mnode.c
@@ -333,7 +333,7 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   SMnodeMsg *pMsg = taosAllocateQitem(sizeof(SMnodeMsg));
   if (pMsg == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    mError("failed to create msg since %s", terrstr());
+    mError("RPC:%p, app:%p failed to create msg since %s", pRpcMsg->handle, pRpcMsg->ahandle, terrstr());
     return NULL;
   }
 
@@ -341,7 +341,7 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   if (rpcGetConnInfo(pRpcMsg->handle, &connInfo) != 0) {
     mndCleanupMsg(pMsg);
     terrno = TSDB_CODE_MND_NO_USER_FROM_CONN;
-    mError("failed to create msg since %s", terrstr());
+    mError("RPC:%p, app:%p failed to create msg since %s", pRpcMsg->handle, pRpcMsg->ahandle, terrstr());
     return NULL;
   }
   memcpy(pMsg->user, connInfo.user, TSDB_USER_LEN);
@@ -350,13 +350,13 @@ SMnodeMsg *mndInitMsg(SMnode *pMnode, SRpcMsg *pRpcMsg) {
   pMsg->rpcMsg = *pRpcMsg;
   pMsg->createdTime = taosGetTimestampSec();
 
-  mTrace("msg:%p, is created", pMsg);
+  mTrace("msg:%p, app:%p is created, RPC:%p", pMsg, pRpcMsg->ahandle, pRpcMsg->handle);
   return pMsg;
 }
 
 void mndCleanupMsg(SMnodeMsg *pMsg) {
+  mTrace("msg:%p, app:%p is destroyed, RPC:%p", pMsg, pMsg->rpcMsg.ahandle, pMsg->rpcMsg.handle);
   taosFreeQitem(pMsg);
-  mTrace("msg:%p, is destroyed", pMsg);
 }
 
 void mndSendRsp(SMnodeMsg *pMsg, int32_t code) {
@@ -371,7 +371,7 @@ static void mndProcessRpcMsg(SMnodeMsg *pMsg) {
   void   *ahandle = pMsg->rpcMsg.ahandle;
   bool    isReq = (msgType % 2 == 1);
 
-  mTrace("msg:%p, app:%p will be processed", pMsg, ahandle);
+  mTrace("msg:%p, app:%p type:%s will be processed", pMsg, ahandle, taosMsg[msgType]);
 
   if (isReq && !mndIsMaster(pMnode)) {
     code = TSDB_CODE_APP_NOT_READY;
@@ -393,7 +393,10 @@ static void mndProcessRpcMsg(SMnodeMsg *pMsg) {
   }
 
   code = (*fp)(pMsg);
-  if (code != 0) {
+  if (code == TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+    mTrace("msg:%p, app:%p in progressing", pMsg, ahandle);
+    return;
+  } else if (code != 0) {
     code = terrno;
     mError("msg:%p, app:%p failed to process since %s", pMsg, ahandle, terrstr());
     goto PROCESS_RPC_END;
diff --git a/source/dnode/mnode/sdb/inc/sdbInt.h b/source/dnode/mnode/sdb/inc/sdbInt.h
index e492f28557aafd2b5141053a45953055f29a6a37..a160533bf23b9141d9ab73d640f723f4369515a2 100644
--- a/source/dnode/mnode/sdb/inc/sdbInt.h
+++ b/source/dnode/mnode/sdb/inc/sdbInt.h
@@ -71,7 +71,6 @@ typedef struct SSdb {
 } SSdb;
 
 int32_t sdbWriteFile(SSdb *pSdb);
-int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mnode/sdb/src/sdb.c b/source/dnode/mnode/sdb/src/sdb.c
index 68cb7be68b249d34a26a854b46635f8d6cb5d0fb..1d4888c2eb37a418e66b994a63510d7f9ba79a72 100644
--- a/source/dnode/mnode/sdb/src/sdb.c
+++ b/source/dnode/mnode/sdb/src/sdb.c
@@ -94,7 +94,7 @@ void sdbCleanup(SSdb *pSdb) {
     taosHashClear(hash);
     taosHashCleanup(hash);
     pSdb->hashObjs[i] = NULL;
-    mTrace("sdb table:%d is cleaned up", i);
+    mDebug("sdb table:%d is cleaned up", i);
   }
 
   free(pSdb);
@@ -129,7 +129,7 @@ int32_t sdbSetTable(SSdb *pSdb, SSdbTable table) {
 
   pSdb->hashObjs[sdbType] = hash;
   taosInitRWLatch(&pSdb->locks[sdbType]);
-  mTrace("sdb table:%d is initialized", sdbType);
+  mDebug("sdb table:%d is initialized", sdbType);
 
   return 0;
 }
\ No newline at end of file
diff --git a/source/dnode/mnode/sdb/src/sdbFile.c b/source/dnode/mnode/sdb/src/sdbFile.c
index 6f88f08b2c3b3741d289a5d47c94b650bd5bf9fb..af37e9e1d5a60f8a609304ddcc956e30f9ef7d31 100644
--- a/source/dnode/mnode/sdb/src/sdbFile.c
+++ b/source/dnode/mnode/sdb/src/sdbFile.c
@@ -118,7 +118,7 @@ int32_t sdbReadFile(SSdb *pSdb) {
       break;
     }
 
-    code = sdbWriteRaw(pSdb, pRaw);
+    code = sdbWriteNotFree(pSdb, pRaw);
     if (code != 0) {
       mError("failed to read file:%s since %s", file, terrstr());
       goto PARSE_SDB_DATA_ERROR;
diff --git a/source/dnode/mnode/sdb/src/sdbHash.c b/source/dnode/mnode/sdb/src/sdbHash.c
index bdca5eaa987a6498b4d36229e5929984980b33f2..53fcc3f5b0bae6877c8d3f492f568d61f1bf8326 100644
--- a/source/dnode/mnode/sdb/src/sdbHash.c
+++ b/source/dnode/mnode/sdb/src/sdbHash.c
@@ -98,7 +98,7 @@ static int32_t sdbUpdateRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
   }
   SSdbRow *pDstRow = *ppDstRow;
 
-  pRow->status = pRaw->status;
+  pDstRow->status = pRaw->status;
   taosRUnLockLatch(pLock);
 
   SdbUpdateFp updateFp = pSdb->updateFps[pRow->type];
@@ -138,7 +138,7 @@ static int32_t sdbDeleteRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
   return code;
 }
 
-int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw) {
+int32_t sdbWriteNotFree(SSdb *pSdb, SSdbRaw *pRaw) {
   SHashObj *hash = sdbGetHash(pSdb, pRaw->type);
   if (hash == NULL) return terrno;
 
@@ -158,7 +158,6 @@ int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw) {
       code = sdbInsertRow(pSdb, hash, pRaw, pRow, keySize);
       break;
     case SDB_STATUS_READY:
-    case SDB_STATUS_DROPPING:
       code = sdbUpdateRow(pSdb, hash, pRaw, pRow, keySize);
       break;
     case SDB_STATUS_DROPPED:
@@ -170,7 +169,7 @@ int32_t sdbWriteRaw(SSdb *pSdb, SSdbRaw *pRaw) {
 }
 
 int32_t sdbWrite(SSdb *pSdb, SSdbRaw *pRaw) {
-  int32_t code = sdbWriteRaw(pSdb, pRaw);
+  int32_t code = sdbWriteNotFree(pSdb, pRaw);
   sdbFreeRaw(pRaw);
   return code;
 }
@@ -201,7 +200,7 @@ void *sdbAcquire(SSdb *pSdb, ESdbType type, void *pKey) {
     case SDB_STATUS_CREATING:
       terrno = TSDB_CODE_SDB_OBJ_CREATING;
       break;
-    case SDB_STATUS_DROPPING:
+    case SDB_STATUS_DROPPED:
       terrno = TSDB_CODE_SDB_OBJ_DROPPING;
       break;
     default:
diff --git a/source/dnode/mnode/sdb/src/sdbRaw.c b/source/dnode/mnode/sdb/src/sdbRaw.c
index 7ed1a427f5cc0e767e622343acc8bf023d4d92ac..e37559808e2b5242354be6187c07fc49a732a940 100644
--- a/source/dnode/mnode/sdb/src/sdbRaw.c
+++ b/source/dnode/mnode/sdb/src/sdbRaw.c
@@ -26,10 +26,15 @@ SSdbRaw *sdbAllocRaw(ESdbType type, int8_t sver, int32_t dataLen) {
   pRaw->type = type;
   pRaw->sver = sver;
   pRaw->dataLen = dataLen;
+
+  mTrace("raw:%p, is created, len:%d", pRaw, dataLen);
   return pRaw;
 }
 
-void sdbFreeRaw(SSdbRaw *pRaw) { free(pRaw); }
+void sdbFreeRaw(SSdbRaw *pRaw) {
+  mTrace("raw:%p, is freed", pRaw);
+  free(pRaw);
+}
 
 int32_t sdbSetRawInt8(SSdbRaw *pRaw, int32_t dataPos, int8_t val) {
   if (pRaw == NULL) {