diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index a3a086ce779701e8a7c31c3c7fb4e398f95d97ba..f611bdfd3177394fc6d4b988d2c10b3e43fd81f6 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -300,8 +300,8 @@ typedef struct STscObj {
   void *             pTimer;
   char               user[TSDB_USER_LEN];
   char               pass[TSDB_KEY_LEN];
-  char               acctId[TSDB_ACCT_LEN];
-  char               db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char               acctId[TSDB_ACCT_ID_LEN];
+  char               db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   char               sversion[TSDB_VERSION_LEN];
   char               writeAuth : 1;
   char               superAuth : 1;
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index a08482f57068496f11ab28c81aee24ace67999df..3d9a467f40bf3112115e0722246f594ae9372da9 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -221,7 +221,7 @@ static int32_t handlePassword(SSqlCmd* pCmd, SStrToken* pPwd) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
   }
 
-  if (pPwd->n >= TSDB_PASSWORD_LEN) {
+  if (pPwd->n >= TSDB_KEY_LEN) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
   }
 
@@ -1242,7 +1242,7 @@ int32_t setObjFullName(char* fullName, const char* account, SStrToken* pDB, SStr
 
   /* db name is not specified, the tableName dose not include db name */
   if (pDB != NULL) {
-    if (pDB->n >= TSDB_ACCT_LEN + TSDB_DB_NAME_LEN || pDB->n == 0) {
+    if (pDB->n >= TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN || pDB->n == 0) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
 
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index da86b4cb1963c0cd4a535976b59f99161cff0ada..b809c4a5e5cb068d644897787c9fdbb593451b05 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -47,7 +47,7 @@ static bool validUserName(const char* user) {
 }
 
 static bool validPassword(const char* passwd) {
-  return validImpl(passwd, TSDB_PASSWORD_LEN - 1);
+  return validImpl(passwd, TSDB_KEY_LEN - 1);
 }
 
 static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pass, const char *auth, const char *db,
@@ -238,11 +238,11 @@ TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t us
                      uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port) {
   char ipBuf[TSDB_EP_LEN] = {0};
   char userBuf[TSDB_USER_LEN] = {0};
-  char passBuf[TSDB_PASSWORD_LEN] = {0};
+  char passBuf[TSDB_KEY_LEN] = {0};
   char dbBuf[TSDB_DB_NAME_LEN] = {0};
   strncpy(ipBuf, ip, MIN(TSDB_EP_LEN - 1, ipLen));
   strncpy(userBuf, user, MIN(TSDB_USER_LEN - 1, userLen));
-  strncpy(passBuf, pass, MIN(TSDB_PASSWORD_LEN - 1, passLen));
+  strncpy(passBuf, pass, MIN(TSDB_KEY_LEN - 1, passLen));
   strncpy(dbBuf, db, MIN(TSDB_DB_NAME_LEN - 1, dbLen));
   return taos_connect(ipBuf, userBuf, passBuf, dbBuf, port);
 }
@@ -978,7 +978,7 @@ static int tscParseTblNameList(SSqlObj *pSql, const char *tblNameList, int32_t t
       return code;
     }
 
-    if (++pCmd->count > TSDB_MULTI_METERMETA_MAX_NUM) {
+    if (++pCmd->count > TSDB_MULTI_TABLEMETA_MAX_NUM) {
       code = TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
       sprintf(pCmd->payload, "tables over the max number");
       return code;
diff --git a/src/cq/src/cqMain.c b/src/cq/src/cqMain.c
index a0df8247b7136412c3f497b3443bdd77c5b8bf4d..0fe5ea78d46e6d2796c1d71531c87ec44cb8ee0d 100644
--- a/src/cq/src/cqMain.c
+++ b/src/cq/src/cqMain.c
@@ -43,7 +43,7 @@ typedef struct {
   int32_t  master;
   int32_t  num;      // number of continuous streams
   char     user[TSDB_USER_LEN];
-  char     pass[TSDB_PASSWORD_LEN];
+  char     pass[TSDB_KEY_LEN];
   char     db[TSDB_DB_NAME_LEN];
   FCqWrite cqWrite;
   struct SCqObj *pHead;
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 9a52cb3beea5e37b6e62081fe8088e770eceede8..c11d404aebe3555b247f907afb50736486982910 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -256,10 +256,8 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_USER_LEN             TSDB_UNI_LEN
 
 // ACCOUNT is a 32 bit positive integer
-// this is the length of its string representation
-// including the terminator zero
-#define TSDB_ACCT_LEN             11
-#define TSDB_PASSWORD_LEN         TSDB_UNI_LEN
+// this is the length of its string representation, including the terminator zero
+#define TSDB_ACCT_ID_LEN          11
 
 #define TSDB_MAX_COLUMNS          1024
 #define TSDB_MIN_COLUMNS          2       //PRIMARY COLUMN(timestamp) + other columns
@@ -267,7 +265,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_NODE_NAME_LEN        64
 #define TSDB_TABLE_NAME_LEN       193     // it is a null-terminated string
 #define TSDB_DB_NAME_LEN          33
-#define TSDB_TABLE_FNAME_LEN      (TSDB_ACCT_LEN + TSDB_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
+#define TSDB_TABLE_FNAME_LEN      (TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
 #define TSDB_COL_NAME_LEN         65
 #define TSDB_MAX_SAVED_SQL_LEN    TSDB_MAX_COLUMNS * 64
 #define TSDB_MAX_SQL_LEN          TSDB_PAYLOAD_SIZE
@@ -293,11 +291,6 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_EP_LEN               (TSDB_FQDN_LEN+6)
 #define TSDB_IPv4ADDR_LEN      	  16
 #define TSDB_FILENAME_LEN         128
-#define TSDB_METER_VNODE_BITS     20
-#define TSDB_METER_SID_MASK       0xFFFFF
-#define TSDB_SHELL_VNODE_BITS     24
-#define TSDB_SHELL_SID_MASK       0xFF
-#define TSDB_HTTP_TOKEN_LEN       20
 #define TSDB_SHOW_SQL_LEN         512
 #define TSDB_SLOW_QUERY_SQL_LEN   512
 
@@ -311,9 +304,6 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_MQTT_TOPIC_LEN       64
 #define TSDB_MQTT_CLIENT_ID_LEN   32
 
-#define TSDB_METER_STATE_OFFLINE  0
-#define TSDB_METER_STATE_ONLLINE  1
-
 #define TSDB_DEFAULT_PKT_SIZE     65480  //same as RPC_MAX_UDP_SIZE
 
 #define TSDB_PAYLOAD_SIZE         TSDB_DEFAULT_PKT_SIZE
@@ -333,7 +323,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 
 #define TSDB_TBNAME_COLUMN_INDEX        (-1)
 #define TSDB_UD_COLUMN_INDEX            (-100)
-#define TSDB_MULTI_METERMETA_MAX_NUM    100000  // maximum batch size allowed to load metermeta
+#define TSDB_MULTI_TABLEMETA_MAX_NUM    100000  // maximum batch size allowed to load table meta
 
 #define TSDB_MIN_CACHE_BLOCK_SIZE       1
 #define TSDB_MAX_CACHE_BLOCK_SIZE       128     // 128MB for each vnode
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 2dee6dc3bb20c7397ef435d4b7f37e5861f8891e..905867fbc7355b34f87e62ab71f8172e4b7bf93e 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -268,7 +268,7 @@ typedef struct {
 typedef struct {
   int32_t len;  // one create table message
   char    tableId[TSDB_TABLE_FNAME_LEN];
-  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t  igExists;
   int8_t  getMeta;
   int16_t numOfTags;
@@ -290,7 +290,7 @@ typedef struct {
 
 typedef struct {
   char    tableId[TSDB_TABLE_FNAME_LEN];
-  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int16_t type; /* operation type   */
   int16_t numOfCols; /* number of schema */
   int32_t tagValLen;
@@ -322,7 +322,7 @@ typedef struct {
 } SConnectMsg;
 
 typedef struct {
-  char      acctId[TSDB_ACCT_LEN];
+  char      acctId[TSDB_ACCT_ID_LEN];
   char      serverVersion[TSDB_VERSION_LEN];
   char      clusterId[TSDB_CLUSTER_ID_LEN];
   int8_t    writeAuth;
@@ -534,7 +534,7 @@ typedef struct {
 } SVnodeLoad;
 
 typedef struct {
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int32_t  cacheBlockSize; //MB
   int32_t  totalBlocks;
   int32_t  maxTables;
@@ -682,7 +682,7 @@ typedef struct {
 } SVnodeDesc;
 
 typedef struct {
-  char       db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char       db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   SVnodeCfg  cfg;
   SVnodeDesc nodes[TSDB_MAX_REPLICA];
 } SCreateVnodeMsg, SAlterVnodeMsg;
@@ -761,7 +761,7 @@ typedef struct {
  */
 typedef struct {
   int8_t   type;
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   uint16_t payloadLen;
   char     payload[];
 } SShowMsg;
diff --git a/src/inc/tcq.h b/src/inc/tcq.h
index ad123d4080e23d2c7933dcea2981fd2376b99afe..1941649d0a02e7c75f4781cad5dedfa185127752 100644
--- a/src/inc/tcq.h
+++ b/src/inc/tcq.h
@@ -26,7 +26,7 @@ typedef int32_t (*FCqWrite)(int32_t vgId, void *pHead, int32_t qtype, void *pMsg
 typedef struct {
   int32_t  vgId;
   char     user[TSDB_USER_LEN];
-  char     pass[TSDB_PASSWORD_LEN];
+  char     pass[TSDB_KEY_LEN];
   char     db[TSDB_DB_NAME_LEN];
   FCqWrite cqWrite;
 } SCqCfg;
diff --git a/src/mnode/inc/mnodeDef.h b/src/mnode/inc/mnodeDef.h
index a07607e615a46c34c1a570cacc42c8f36769b754..47d485d97cd598d1212fe562b2de2bed9f2f640a 100644
--- a/src/mnode/inc/mnodeDef.h
+++ b/src/mnode/inc/mnodeDef.h
@@ -138,7 +138,7 @@ typedef struct SVgObj {
   int64_t        createdTime;
   int32_t        lbDnodeId;
   int32_t        lbTime;
-  char           dbName[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char           dbName[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t         inUse;
   int8_t         accessState;
   int8_t         status;
@@ -179,7 +179,7 @@ typedef struct {
 } SDbCfg;
 
 typedef struct SDbObj {
-  char    name[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char    name[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   int8_t  reserved0[4];
   char    acct[TSDB_USER_LEN];
   int64_t createdTime;
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index 827be0687dbac338d660d07fefaf563d5c5d0341..881ef95fca0ac327d75ab00007b1bab3c8980578 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -565,7 +565,7 @@ int32_t mnodeCreateVgroup(SMnodeMsg *pMsg) {
   SDbObj *pDb = pMsg->pDb;
 
   SVgObj *pVgroup = (SVgObj *)calloc(1, sizeof(SVgObj));
-  tstrncpy(pVgroup->dbName, pDb->name, TSDB_ACCT_LEN + TSDB_DB_NAME_LEN);
+  tstrncpy(pVgroup->dbName, pDb->name, TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN);
   pVgroup->numOfVnodes = pDb->cfg.replications;
   pVgroup->createdTime = taosGetTimestampMs();
   pVgroup->accessState = TSDB_VN_ALL_ACCCESS;
diff --git a/src/plugins/http/inc/httpInt.h b/src/plugins/http/inc/httpInt.h
index ebdfabf3101001d020e24bf63c3d699492ff21d0..ac182b707b585adf76b92cf4fbc027d22277f220 100644
--- a/src/plugins/http/inc/httpInt.h
+++ b/src/plugins/http/inc/httpInt.h
@@ -39,7 +39,7 @@
 #define HTTP_GC_TARGET_SIZE         512
 #define HTTP_WRITE_RETRY_TIMES      500
 #define HTTP_WRITE_WAIT_TIME_MS     5
-#define HTTP_SESSION_ID_LEN         (TSDB_USER_LEN + TSDB_PASSWORD_LEN)
+#define HTTP_SESSION_ID_LEN         (TSDB_USER_LEN + TSDB_KEY_LEN)
 
 typedef enum HttpReqType {
   HTTP_REQTYPE_OTHERS = 0,
@@ -147,7 +147,7 @@ typedef struct HttpContext {
   uint8_t      parsed;
   char         ipstr[22];
   char         user[TSDB_USER_LEN];  // parsed from auth token or login message
-  char         pass[TSDB_PASSWORD_LEN];
+  char         pass[TSDB_KEY_LEN];
   TAOS *       taos;
   void *       ppContext;
   HttpSession *session;
diff --git a/src/plugins/http/src/httpAuth.c b/src/plugins/http/src/httpAuth.c
index 8beef7c042ba6f0194d814753e15387e3d2b4a2b..56da8a7089e635effa0fc54e1aeb7137ea391c23 100644
--- a/src/plugins/http/src/httpAuth.c
+++ b/src/plugins/http/src/httpAuth.c
@@ -51,7 +51,7 @@ int32_t httpParseBasicAuthToken(HttpContext *pContext, char *token, int32_t len)
 
   char *password = user + 1;
   int32_t pass_len = (int32_t)((base64 + outlen) - password);
-  if (pass_len < 1 || pass_len >= TSDB_PASSWORD_LEN) {
+  if (pass_len < 1 || pass_len >= TSDB_KEY_LEN) {
     httpError("context:%p, fd:%d, basic token:%s parse password error", pContext, pContext->fd, token);
     free(base64);
     return -1;
@@ -73,7 +73,7 @@ int32_t httpParseTaosdAuthToken(HttpContext *pContext, char *token, int32_t len)
     if (base64) free(base64);
     return 01;
   }
-  if (outlen != (TSDB_USER_LEN + TSDB_PASSWORD_LEN)) {
+  if (outlen != (TSDB_USER_LEN + TSDB_KEY_LEN)) {
     httpError("context:%p, fd:%d, taosd token:%s length error", pContext, pContext->fd, token);
     free(base64);
     return -1;
@@ -103,8 +103,8 @@ int32_t httpGenTaosdAuthToken(HttpContext *pContext, char *token, int32_t maxLen
   size = sizeof(pContext->pass);
   tstrncpy(buffer + sizeof(pContext->user), pContext->pass, size);
 
-  char *encrypt = taosDesEncode(KEY_DES_4, buffer, TSDB_USER_LEN + TSDB_PASSWORD_LEN);
-  char *base64 = base64_encode((const unsigned char *)encrypt, TSDB_USER_LEN + TSDB_PASSWORD_LEN);
+  char *encrypt = taosDesEncode(KEY_DES_4, buffer, TSDB_USER_LEN + TSDB_KEY_LEN);
+  char *base64 = base64_encode((const unsigned char *)encrypt, TSDB_USER_LEN + TSDB_KEY_LEN);
 
   size_t len = strlen(base64);
   tstrncpy(token, base64, len + 1);
diff --git a/src/plugins/http/src/httpGcHandle.c b/src/plugins/http/src/httpGcHandle.c
index 5d4cb0c6809d063107cb37ccaac1200f2c87ee9d..c21799e736027eb4a021032d670f1b542500fe8f 100644
--- a/src/plugins/http/src/httpGcHandle.c
+++ b/src/plugins/http/src/httpGcHandle.c
@@ -59,11 +59,11 @@ bool gcGetUserFromUrl(HttpContext* pContext) {
 
 bool gcGetPassFromUrl(HttpContext* pContext) {
   HttpParser* pParser = pContext->parser;
-  if (pParser->path[GC_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[GC_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[GC_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[GC_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
-  tstrncpy(pContext->pass, pParser->path[GC_PASS_URL_POS].str, TSDB_PASSWORD_LEN);
+  tstrncpy(pContext->pass, pParser->path[GC_PASS_URL_POS].str, TSDB_KEY_LEN);
   return true;
 }
 
diff --git a/src/plugins/http/src/httpRestHandle.c b/src/plugins/http/src/httpRestHandle.c
index 0a28c431ef313d36bd54b686e583e0dfb2313c0f..66f1db1a541322a0018e741dd537cd7b518f4bb5 100644
--- a/src/plugins/http/src/httpRestHandle.c
+++ b/src/plugins/http/src/httpRestHandle.c
@@ -72,11 +72,11 @@ bool restGetUserFromUrl(HttpContext* pContext) {
 
 bool restGetPassFromUrl(HttpContext* pContext) {
   HttpParser* pParser = pContext->parser;
-  if (pParser->path[REST_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[REST_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[REST_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[REST_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
-  tstrncpy(pContext->pass, pParser->path[REST_PASS_URL_POS].str, TSDB_PASSWORD_LEN);
+  tstrncpy(pContext->pass, pParser->path[REST_PASS_URL_POS].str, TSDB_KEY_LEN);
   return true;
 }
 
diff --git a/src/plugins/http/src/httpTgHandle.c b/src/plugins/http/src/httpTgHandle.c
index e2b57b87bb3a10ee50edbf55ae2590289f940bf6..0a3ef539e37acd576596e5444ea3989602c00e90 100644
--- a/src/plugins/http/src/httpTgHandle.c
+++ b/src/plugins/http/src/httpTgHandle.c
@@ -324,7 +324,7 @@ bool tgGetUserFromUrl(HttpContext *pContext) {
 
 bool tgGetPassFromUrl(HttpContext *pContext) {
   HttpParser *pParser = pContext->parser;
-  if (pParser->path[TG_PASS_URL_POS].pos >= TSDB_PASSWORD_LEN || pParser->path[TG_PASS_URL_POS].pos <= 0) {
+  if (pParser->path[TG_PASS_URL_POS].pos >= TSDB_KEY_LEN || pParser->path[TG_PASS_URL_POS].pos <= 0) {
     return false;
   }
 
diff --git a/src/vnode/inc/vnodeInt.h b/src/vnode/inc/vnodeInt.h
index 7adeda590a509df9554c5dc83fa66758ed8ed9d2..3ec77bbc122341935a804448eca61258c634cf58 100644
--- a/src/vnode/inc/vnodeInt.h
+++ b/src/vnode/inc/vnodeInt.h
@@ -67,7 +67,7 @@ typedef struct {
   void *   qMgmt;
   char *   rootDir;
   tsem_t   sem;
-  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN];
   pthread_mutex_t statusMutex;
 } SVnodeObj;