diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index c04871471205a066e5c4f5fadda866823a7cac0c..a9b2e12fd5c061a8099d3dff2960f4d781ec20a8 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1377,11 +1377,6 @@ int tscAlterDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   pCmd->payloadLen = sizeof(SCMAlterDbMsg);
   pCmd->msgType = TSDB_MSG_TYPE_CM_ALTER_DB;
 
-  if (TSDB_CODE_SUCCESS != tscAllocPayload(pCmd, pCmd->payloadLen)) {
-    tscError("%p failed to malloc for query msg", pSql);
-    return TSDB_CODE_CLI_OUT_OF_MEMORY;
-  }
-
   SCMAlterDbMsg *pAlterDbMsg = (SCMAlterDbMsg*)pCmd->payload;
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
   strcpy(pAlterDbMsg->db, pTableMetaInfo->name);
diff --git a/src/dnode/src/dnodeMgmt.c b/src/dnode/src/dnodeMgmt.c
index a319c0bb9a733febe4c093159e6c3749f7878b4f..fef91c578662c7c7b52bb66663d504c288528a7e 100644
--- a/src/dnode/src/dnodeMgmt.c
+++ b/src/dnode/src/dnodeMgmt.c
@@ -128,6 +128,7 @@ static void dnodeCloseVnodes() {
 static int32_t dnodeProcessCreateVnodeMsg(SRpcMsg *rpcMsg) {
   SMDCreateVnodeMsg *pCreate = rpcMsg->pCont;
   pCreate->cfg.vgId                = htonl(pCreate->cfg.vgId);
+  pCreate->cfg.cfgVersion          = htonl(pCreate->cfg.cfgVersion);
   pCreate->cfg.maxTables           = htonl(pCreate->cfg.maxTables);
   pCreate->cfg.cacheBlockSize      = htonl(pCreate->cfg.cacheBlockSize);
   pCreate->cfg.totalBlocks         = htonl(pCreate->cfg.totalBlocks);
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 54523196dd54c9b3d3ff104e5cfe1a293455bd4d..1b422af31f2652272e9c4ccb886106911315dfb5 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -505,6 +505,7 @@ typedef struct SRetrieveTableRsp {
 
 typedef struct {
   int32_t vgId;
+  int32_t cfgVersion;
   int64_t totalStorage;
   int64_t compStorage;
   int64_t pointsWritten;
@@ -599,6 +600,7 @@ typedef struct {
 
 typedef struct {
   uint32_t vgId;
+  int32_t  cfgVersion;
   int32_t  cacheBlockSize;
   int32_t  totalBlocks;
   int32_t  maxTables;
diff --git a/src/mnode/inc/mgmtDef.h b/src/mnode/inc/mgmtDef.h
index f91a8d6bb4c98c1abb88ce5a3367af22445ccb89..a7e75f977761937c7ad272d907e9046f2f6fbc92 100644
--- a/src/mnode/inc/mgmtDef.h
+++ b/src/mnode/inc/mgmtDef.h
@@ -164,6 +164,7 @@ typedef struct SDbObj {
   char    name[TSDB_DB_NAME_LEN + 1];
   char    acct[TSDB_USER_LEN + 1];
   int64_t createdTime;
+  int32_t cfgVersion;
   SDbCfg  cfg;
   int8_t  status;
   int8_t  reserved[14];
diff --git a/src/mnode/src/mgmtDb.c b/src/mnode/src/mgmtDb.c
index 844d40b6056c23e9d59e03e010c9b5279026c3ee..29d23432319f2db0525e7606ab3256816b6a3c37 100644
--- a/src/mnode/src/mgmtDb.c
+++ b/src/mnode/src/mgmtDb.c
@@ -22,6 +22,7 @@
 #include "tglobal.h"
 #include "ttime.h"
 #include "tname.h"
+#include "tbalance.h"
 #include "mgmtDef.h"
 #include "mgmtLog.h"
 #include "mgmtAcct.h"
@@ -715,39 +716,65 @@ static void mgmtProcessCreateDbMsg(SQueuedMsg *pMsg) {
 
 static SDbCfg mgmtGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
   SDbCfg  newCfg = pDb->cfg;
-  int32_t daysToKeep = htonl(pAlter->daysToKeep);
+  int32_t cacheBlockSize = htonl(pAlter->daysToKeep);
+  int32_t totalBlocks = htonl(pAlter->totalBlocks);
   int32_t maxTables = htonl(pAlter->maxSessions);
+  int32_t daysToKeep = htonl(pAlter->daysToKeep);
+  int32_t daysToKeep1 = htonl(pAlter->daysToKeep1);
+  int32_t daysToKeep2 = htonl(pAlter->daysToKeep2);
+  int8_t  compression = pAlter->compression;
   int8_t  replications = pAlter->replications;
 
   terrno = TSDB_CODE_SUCCESS;
 
+  if (cacheBlockSize > 0 && cacheBlockSize != pDb->cfg.cacheBlockSize) {
+    mTrace("db:%s, cache:%d change to %d", pDb->name, pDb->cfg.cacheBlockSize, cacheBlockSize);
+    newCfg.cacheBlockSize = cacheBlockSize;
+  }
+
+  if (totalBlocks > 0 && totalBlocks != pDb->cfg.totalBlocks) {
+    mTrace("db:%s, blocks:%d change to %d", pDb->name, pDb->cfg.totalBlocks, totalBlocks);
+    newCfg.totalBlocks = totalBlocks;
+  }
+
+  if (maxTables > 0 && maxTables != pDb->cfg.maxTables) {
+    mTrace("db:%s, tables:%d change to %d", pDb->name, pDb->cfg.maxTables, maxTables);
+    newCfg.maxTables = maxTables;
+    if (newCfg.maxTables < pDb->cfg.maxTables) {
+      mTrace("db:%s, tables:%d should larger than origin:%d", pDb->name, newCfg.maxTables, pDb->cfg.maxTables);
+      terrno = TSDB_CODE_INVALID_OPTION;
+    }
+  }
+
   if (daysToKeep > 0 && daysToKeep != pDb->cfg.daysToKeep) {
     mTrace("db:%s, daysToKeep:%d change to %d", pDb->name, pDb->cfg.daysToKeep, daysToKeep);
     newCfg.daysToKeep = daysToKeep;
-  } 
-  
+  }
+
+  if (daysToKeep1 > 0 && daysToKeep1 != pDb->cfg.daysToKeep1) {
+    mTrace("db:%s, daysToKeep1:%d change to %d", pDb->name, pDb->cfg.daysToKeep1, daysToKeep1);
+    newCfg.daysToKeep1 = daysToKeep1;
+  }
+
+  if (daysToKeep2 > 0 && daysToKeep2 != pDb->cfg.daysToKeep2) {
+    mTrace("db:%s, daysToKeep2:%d change to %d", pDb->name, pDb->cfg.daysToKeep2, daysToKeep2);
+    newCfg.daysToKeep2 = daysToKeep2;
+  }
+
+  if (compression > 0 && compression != pDb->cfg.compression) {
+    mTrace("db:%s, compression:%d change to %d", pDb->name, pDb->cfg.compression, compression);
+    newCfg.compression = compression;
+  }
+
   if (replications > 0 && replications != pDb->cfg.replications) {
-    mTrace("db:%s, replica:%d change to %d", pDb->name, pDb->cfg.replications, replications);
-    if (replications < TSDB_MIN_REPLICA_NUM || replications > TSDB_MAX_REPLICA_NUM) {
-      mError("invalid db option replica: %d valid range: %d--%d", replications, TSDB_MIN_REPLICA_NUM, TSDB_MAX_REPLICA_NUM);
-      terrno = TSDB_CODE_INVALID_OPTION;
-    }
+    mTrace("db:%s, replications:%d change to %d", pDb->name, pDb->cfg.replications, replications);
     newCfg.replications = replications;
   } 
-  
-  if (maxTables > 0 && maxTables != pDb->cfg.maxTables) {
-    mTrace("db:%s, tables:%d change to %d", pDb->name, pDb->cfg.maxTables, maxTables);
-    if (maxTables < TSDB_MIN_TABLES || maxTables > TSDB_MAX_TABLES) {
-      mError("invalid db option tables: %d valid range: %d--%d", maxTables, TSDB_MIN_TABLES, TSDB_MAX_TABLES);
-      terrno = TSDB_CODE_INVALID_OPTION;
-    }
-    if (maxTables < pDb->cfg.maxTables) {
-      mError("invalid db option tables: %d should larger than original:%d", maxTables, pDb->cfg.maxTables);
-      terrno = TSDB_CODE_INVALID_OPTION;
-    }
-    newCfg.maxTables = maxTables;
+  if (replications > mgmtGetDnodesNum()) {
+    mError("db:%s, no enough dnode to change replica:%d", pDb->name, replications);
+    terrno = TSDB_CODE_NO_ENOUGH_DNODES;
   }
-
+  
   return newCfg;
 }
 
@@ -757,8 +784,16 @@ static int32_t mgmtAlterDb(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
     return terrno;
   }
 
+  int32_t code = mgmtCheckDbCfg(&newCfg);
+  if (code != TSDB_CODE_SUCCESS) {
+    return code;
+  }
+
+  int32_t oldReplica = pDb->cfg.replications;
+
   if (memcmp(&newCfg, &pDb->cfg, sizeof(SDbCfg)) != 0) {
     pDb->cfg = newCfg;
+    pDb->cfgVersion++;
     SSdbOper oper = {
       .type = SDB_OPER_GLOBAL,
       .table = tsDbSdb,
@@ -771,7 +806,20 @@ static int32_t mgmtAlterDb(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
       return TSDB_CODE_SDB_ERROR;
     }
   }
-  
+
+  void *pNode = NULL;
+  while (1) {
+    SVgObj *pVgroup = NULL;
+    pNode = mgmtGetNextVgroup(pNode, &pVgroup);
+    if (pVgroup == NULL) break;   
+    mgmtSendCreateVgroupMsg(pVgroup, NULL);
+    mgmtDecVgroupRef(pVgroup);
+  }
+
+  if (oldReplica != pDb->cfg.replications) {
+    balanceNotify();
+  }
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -799,16 +847,6 @@ static void mgmtProcessAlterDbMsg(SQueuedMsg *pMsg) {
     return;
   }
 
-  SVgObj *pVgroup = pDb->pHead;
-  if (pVgroup != NULL) {
-    mPrint("vgroup:%d, will be altered", pVgroup->vgId);
-    SQueuedMsg *newMsg = mgmtCloneQueuedMsg(pMsg);
-    newMsg->ahandle = pVgroup;
-    newMsg->expected = pVgroup->numOfVnodes;
-    mgmtAlterVgroup(pVgroup, newMsg);
-    return;
-  }
-
   mTrace("db:%s, all vgroups is altered", pDb->name);
   mgmtSendSimpleResp(pMsg->thandle, TSDB_CODE_SUCCESS);
 }
diff --git a/src/mnode/src/mgmtDnode.c b/src/mnode/src/mgmtDnode.c
index 8afeadeb0c3b54d7a44c07e49d91479f6f966559..efa0b03ded09c95db07f9abeb9113614beb8e90a 100644
--- a/src/mnode/src/mgmtDnode.c
+++ b/src/mnode/src/mgmtDnode.c
@@ -336,13 +336,14 @@ void mgmtProcessDnodeStatusMsg(SRpcMsg *rpcMsg) {
   if (pStatus->dnodeId == 0) {
     mTrace("dnode:%d, first access, privateIp:%s, name:%s", pDnode->dnodeId, taosIpStr(pDnode->privateIp), pDnode->dnodeName);
   } else {
-    //mTrace("dnode:%d, status received, access times %d", pDnode->dnodeId, pDnode->lastAccess);
+    mTrace("dnode:%d, status received, access times %d", pDnode->dnodeId, pDnode->lastAccess);
   }
  
   int32_t openVnodes = htons(pStatus->openVnodes);
   for (int32_t j = 0; j < openVnodes; ++j) {
     SVnodeLoad *pVload = &pStatus->load[j];
     pVload->vgId = htonl(pVload->vgId);
+    pVload->cfgVersion = htonl(pVload->cfgVersion);
 
     SVgObj *pVgroup = mgmtGetVgroup(pVload->vgId);
     if (pVgroup == NULL) {
diff --git a/src/mnode/src/mgmtVgroup.c b/src/mnode/src/mgmtVgroup.c
index feedf5fdc3b9148e3a31d0e2c8accc27a5cf53d9..45512b86b320c5f6b706dc404f0b22c6315c2aff 100644
--- a/src/mnode/src/mgmtVgroup.c
+++ b/src/mnode/src/mgmtVgroup.c
@@ -272,8 +272,9 @@ void mgmtUpdateVgroupStatus(SVgObj *pVgroup, SDnodeObj *pDnode, SVnodeLoad *pVlo
     pVgroup->pointsWritten = htobe64(pVload->pointsWritten);
   }
 
-  if (pVload->replica != pVgroup->numOfVnodes) {
-    mError("dnode:%d, vgroup:%d replica:%d not match with mgmt:%d", pDnode->dnodeId, pVload->vgId, pVload->replica,
+  if (pVload->cfgVersion != pVgroup->pDb->cfgVersion || pVload->replica != pVgroup->numOfVnodes) {
+    mError("dnode:%d, vgroup:%d, vnode cfgVersion:%d repica:%d not match with mgmt cfgVersion:%d replica:%d",
+           pDnode->dnodeId, pVload->vgId, pVload->cfgVersion, pVload->replica, pVgroup->pDb->cfgVersion,
            pVgroup->numOfVnodes);
     mgmtSendCreateVgroupMsg(pVgroup, NULL);
   }
@@ -535,6 +536,7 @@ SMDCreateVnodeMsg *mgmtBuildCreateVnodeMsg(SVgObj *pVgroup) {
 
   SMDVnodeCfg *pCfg = &pVnode->cfg;
   pCfg->vgId                = htonl(pVgroup->vgId);
+  pCfg->cfgVersion          = htonl(pDb->cfgVersion);
   pCfg->cacheBlockSize      = htonl(pDb->cfg.cacheBlockSize);
   pCfg->totalBlocks         = htonl(pDb->cfg.totalBlocks);
   pCfg->maxTables           = htonl(pDb->cfg.maxTables);
@@ -769,15 +771,3 @@ void mgmtDropAllVgroups(SDbObj *pDropDb) {
 
   mPrint("db:%s, all vgroups:%d is dropped from sdb", pDropDb->name, numOfVgroups);
 }
-
-void mgmtAlterVgroup(SVgObj *pVgroup, void *ahandle) {
-  assert(ahandle != NULL);
-
-  if (pVgroup->numOfVnodes != pVgroup->pDb->cfg.replications) {
-    // TODO:
-    // mgmtSendAlterVgroupMsg(pVgroup, NULL);
-  } else {
-    mgmtAddToShellQueue(ahandle);
-  }
-}
-
diff --git a/src/vnode/inc/vnodeInt.h b/src/vnode/inc/vnodeInt.h
index f1b9d55d54daf224c96529499ff8bf9ffc94a512..d99cb1c96c044f83305f05829b2565f79d4993d0 100644
--- a/src/vnode/inc/vnodeInt.h
+++ b/src/vnode/inc/vnodeInt.h
@@ -36,6 +36,7 @@ typedef struct {
   void        *sync;
   void        *events;
   void        *cq;  // continuous query
+  int32_t     cfgVersion;
   STsdbCfg    tsdbCfg;
   SSyncCfg    syncCfg;
   SWalCfg     walCfg;
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 153bdbffd806f4addc6aa68b9f445f5a9aab40c6..96470c4e3a81bf20651642e423fd0f3a26871db7 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -331,6 +331,7 @@ static void vnodeBuildVloadMsg(char *pNode, void * param) {
 
   SVnodeLoad *pLoad = &pStatus->load[pStatus->openVnodes++];
   pLoad->vgId = htonl(pVnode->vgId);
+  pLoad->cfgVersion = htonl(pVnode->cfgVersion);
   pLoad->totalStorage = htobe64(pLoad->totalStorage);
   pLoad->compStorage = htobe64(pLoad->compStorage);
   pLoad->pointsWritten = htobe64(pLoad->pointsWritten);
@@ -389,6 +390,7 @@ static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
 
   len += snprintf(content + len, maxLen - len, "{\n");
 
+  len += snprintf(content + len, maxLen - len, "  \"cfgVersion\": %d,\n", pVnodeCfg->cfg.cfgVersion);
   len += snprintf(content + len, maxLen - len, "  \"cacheBlockSize\": %d,\n", pVnodeCfg->cfg.cacheBlockSize);
   len += snprintf(content + len, maxLen - len, "  \"totalBlocks\": %d,\n", pVnodeCfg->cfg.totalBlocks);
   len += snprintf(content + len, maxLen - len, "  \"maxTables\": %d,\n", pVnodeCfg->cfg.maxTables);
@@ -463,6 +465,13 @@ static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
     goto PARSE_OVER;
   }
 
+  cJSON *cfgVersion = cJSON_GetObjectItem(root, "cfgVersion");
+  if (!cfgVersion || cfgVersion->type != cJSON_Number) {
+    dError("pVnode:%p vgId:%d, failed to read vnode cfg, cfgVersion not found", pVnode, pVnode->vgId);
+    goto PARSE_OVER;
+  }
+  pVnode->cfgVersion = cfgVersion->valueint;
+
   cJSON *cacheBlockSize = cJSON_GetObjectItem(root, "cacheBlockSize");
   if (!cacheBlockSize || cacheBlockSize->type != cJSON_Number) {
     dError("pVnode:%p vgId:%d, failed to read vnode cfg, cacheBlockSize not found", pVnode, pVnode->vgId);