diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 4ccdb6b327a72c9f7072ea7b3b247a25d246ec1a..37bbd93ec610692fc538d0a6b4d5524ddfb22cd7 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -469,6 +469,9 @@ void *tscProcessMsgFromServer(char *msg, void *ahandle, void *thandle) {
 
       if (pCmd->command > TSDB_SQL_MGMT) {
         tscProcessMgmtRedirect(pSql, pMsg->content + 1);
+      } else if (pCmd->command == TSDB_SQL_INSERT){
+        pSql->index++;
+        pSql->maxRetry = TSDB_VNODES_SUPPORT * 2;
       } else {
         pSql->index++;
       }
@@ -1400,7 +1403,7 @@ void tscUpdateVnodeInSubmitMsg(SSqlObj *pSql, char *buf) {
 
   pShellMsg = (SShellSubmitMsg *)pMsg;
   pShellMsg->vnode = htons(pMeterMeta->vpeerDesc[pSql->index].vnode);
-  tscTrace("%p update submit msg vnode:%d", pSql, htons(pShellMsg->vnode));
+  tscTrace("%p update submit msg vnode:%s:%d", pSql, taosIpStr(pMeterMeta->vpeerDesc[pSql->index].ip), htons(pShellMsg->vnode));
 }
 
 int tscBuildSubmitMsg(SSqlObj *pSql) {
@@ -1421,7 +1424,7 @@ int tscBuildSubmitMsg(SSqlObj *pSql) {
 
   // pSql->cmd.payloadLen is set during parse sql routine, so we do not use it here
   pSql->cmd.msgType = TSDB_MSG_TYPE_SUBMIT;
-  tscTrace("%p update submit msg vnode:%d", pSql, htons(pShellMsg->vnode));
+  tscTrace("%p update submit msg vnode:%s:%d", pSql, taosIpStr(pMeterMeta->vpeerDesc[pMeterMeta->index].ip), htons(pShellMsg->vnode));
 
   return msgLen;
 }
diff --git a/src/kit/shell/inc/shell.h b/src/kit/shell/inc/shell.h
index 12024d0b8673e1349e5a789d60632a278c7a696a..499c93e0ec96ddf0b3b655286207cf23b1f5694d 100644
--- a/src/kit/shell/inc/shell.h
+++ b/src/kit/shell/inc/shell.h
@@ -58,6 +58,8 @@ struct arguments {
   bool  is_raw_time;
   bool  is_use_passwd;
   char  file[TSDB_FILENAME_LEN];
+  char  dir[TSDB_FILENAME_LEN];
+  int   threadNum;
   char* commands;
   int   abort;
 };
@@ -74,12 +76,14 @@ void shellRunCommandOnServer(TAOS* con, char command[]);
 void read_history();
 void write_history();
 void source_file(TAOS* con, char* fptr);
+void source_dir(TAOS* con, struct arguments* args);
 void get_history_path(char* history);
 void cleanup_handler(void* arg);
 void exitShell();
 int shellDumpResult(TAOS* con, char* fname, int* error_no, bool printMode);
 void shellPrintNChar(char* str, int width, bool printMode);
 void shellGetGrantInfo(void *con);
+int isCommentLine(char *line);
 #define max(a, b) ((int)(a) < (int)(b) ? (int)(b) : (int)(a))
 
 /**************** Global variable declarations ****************/
diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 04381f5382195bf5aa4326e6cb957a5dd8a51fdd..ac66ab15d90ddaf3ceada296e713b1a9b3a9f75b 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -111,6 +111,14 @@ TAOS *shellInit(struct arguments *args) {
     exit(EXIT_SUCCESS);
   }
 
+#ifdef LINUX
+  if (args->dir[0] != 0) {
+    source_dir(con, args);
+    taos_close(con);
+    exit(EXIT_SUCCESS);
+  }
+#endif
+
   printf(SERVER_VERSION, taos_get_server_info(con));
 
   return con;
@@ -765,7 +773,7 @@ void taos_error(TAOS *con) {
   taos_free_result(pRes);
 }
 
-static int isCommentLine(char *line) {
+int isCommentLine(char *line) {
   if (line == NULL) return 1;
 
   return regex_match(line, "^\\s*#.*", REG_EXTENDED);
diff --git a/src/kit/shell/src/shellImport.c b/src/kit/shell/src/shellImport.c
new file mode 100644
index 0000000000000000000000000000000000000000..3292aa8e04bba29b8e3636a3b4988ae2f4cd8362
--- /dev/null
+++ b/src/kit/shell/src/shellImport.c
@@ -0,0 +1,266 @@
+/*
+ * 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/>.
+ */
+
+#define _XOPEN_SOURCE
+#define _DEFAULT_SOURCE
+
+#include "os.h"
+#include "shell.h"
+#include "shellCommand.h"
+#include "ttime.h"
+#include "tutil.h"
+
+static char **shellSQLFiles = NULL;
+static int32_t shellSQLFileNum = 0;
+static char shellTablesSQLFile[TSDB_FILENAME_LEN] = {0};
+
+typedef struct {
+  pthread_t threadID;
+  int       threadIndex;
+  int       totalThreads;
+  void     *taos;
+} ShellThreadObj;
+
+static int shellGetFilesNum(const char *directoryName, const char *prefix)
+{
+  char cmd[1024] = { 0 };
+  sprintf(cmd, "ls %s/*.%s | wc -l ", directoryName, prefix);
+
+  FILE *fp = popen(cmd, "r");
+  if (fp == NULL) {
+    fprintf(stderr, "ERROR: failed to execute:%s, error:%s\n", cmd, strerror(errno));
+    exit(0);
+  }
+
+  int fileNum = 0;
+  if (fscanf(fp, "%d", &fileNum) != 1) {
+    fprintf(stderr, "ERROR: failed to execute:%s, parse result error\n", cmd);
+    exit(0);
+  }
+
+  if (fileNum <= 0) {
+    fprintf(stderr, "ERROR: directory:%s is empry\n", directoryName);
+    exit(0);
+  }
+
+  pclose(fp);
+  return fileNum;
+}
+
+static void shellParseDirectory(const char *directoryName, const char *prefix, char **fileArray, int totalFiles)
+{
+  char cmd[1024] = { 0 };
+  sprintf(cmd, "ls %s/*.%s | sort", directoryName, prefix);
+
+  FILE *fp = popen(cmd, "r");
+  if (fp == NULL) {
+    fprintf(stderr, "ERROR: failed to execute:%s, error:%s\n", cmd, strerror(errno));
+    exit(0);
+  }
+
+  int fileNum = 0;
+  while (fscanf(fp, "%s", fileArray[fileNum++])) {
+    if (strcmp(fileArray[fileNum-1], shellTablesSQLFile) == 0) {
+      fileNum--;
+    }
+    if (fileNum >= totalFiles) {
+      break;
+    }
+  }
+
+  if (fileNum != totalFiles) {
+    fprintf(stderr, "ERROR: directory:%s changed while read\n", directoryName);
+    exit(0);
+  }
+
+  pclose(fp);
+}
+
+static void shellCheckTablesSQLFile(const char *directoryName)
+{
+  char cmd[1024] = { 0 };
+  sprintf(cmd, "ls %s/tables.sql", directoryName);
+
+  FILE *fp = popen(cmd, "r");
+  if (fp == NULL) {
+    fprintf(stderr, "ERROR: failed to execute:%s, error:%s\n", cmd, strerror(errno));
+    exit(0);
+  }
+
+  while (fscanf(fp, "%s", shellTablesSQLFile)) {
+    break;
+  }
+
+  pclose(fp);
+}
+
+static void shellMallocSQLFiles()
+{
+  shellSQLFiles = (char**)calloc(shellSQLFileNum, sizeof(char*));
+  for (int i = 0; i < shellSQLFileNum; i++) {
+    shellSQLFiles[i] = calloc(1, TSDB_FILENAME_LEN);
+  }
+}
+
+static void shellGetDirectoryFileList(char *inputDir)
+{
+  struct stat fileStat;
+  if (stat(inputDir, &fileStat) < 0) {
+    fprintf(stderr, "ERROR: %s not exist\n", inputDir);
+    exit(0);
+  }
+
+  if (fileStat.st_mode & S_IFDIR) {
+    shellCheckTablesSQLFile(inputDir);
+    shellSQLFileNum = shellGetFilesNum(inputDir, "sql");
+    int totalSQLFileNum = shellSQLFileNum;
+    if (shellTablesSQLFile[0] != 0) {
+      shellSQLFileNum--;
+    }
+    shellMallocSQLFiles();
+    shellParseDirectory(inputDir, "sql", shellSQLFiles, shellSQLFileNum);
+    fprintf(stdout, "\nstart to dispose %d files in %s\n", totalSQLFileNum, inputDir);
+  }
+  else {
+    fprintf(stderr, "ERROR: %s is not a directory\n", inputDir);
+    exit(0);
+  }
+}
+
+static void shellSourceFile(TAOS *con, char *fptr) {
+  wordexp_t full_path;
+  int       read_len = 0;
+  char *    cmd = malloc(MAX_COMMAND_SIZE);
+  size_t    cmd_len = 0;
+  char *    line = NULL;
+  size_t    line_len = 0;
+
+  if (wordexp(fptr, &full_path, 0) != 0) {
+    fprintf(stderr, "ERROR: illegal file name\n");
+    return;
+  }
+
+  char *fname = full_path.we_wordv[0];
+
+  if (access(fname, R_OK) == -1) {
+    fprintf(stderr, "ERROR: file %s is not readable\n", fptr);
+    wordfree(&full_path);
+    return;
+  }
+
+  FILE *f = fopen(fname, "r");
+  if (f == NULL) {
+    fprintf(stderr, "ERROR: failed to open file %s\n", fname);
+    wordfree(&full_path);
+    return;
+  }
+
+  fprintf(stdout, "begin import file:%s\n", fname);
+
+  int lineNo = 0;
+  while ((read_len = getline(&line, &line_len, f)) != -1) {
+    ++lineNo;
+    if (read_len >= MAX_COMMAND_SIZE) continue;
+    line[--read_len] = '\0';
+
+    if (read_len == 0 || isCommentLine(line)) {  // line starts with #
+      continue;
+    }
+
+    if (line[read_len - 1] == '\\') {
+      line[read_len - 1] = ' ';
+      memcpy(cmd + cmd_len, line, read_len);
+      cmd_len += read_len;
+      continue;
+    }
+
+    memcpy(cmd + cmd_len, line, read_len);
+    if (taos_query(con, cmd)) {
+      fprintf(stderr, "DB error: %s: %s (%d)\n", taos_errstr(con), fname, lineNo);
+      /* free local resouce: allocated memory/metric-meta refcnt */
+      TAOS_RES *pRes = taos_use_result(con);
+      taos_free_result(pRes);
+    }
+
+    memset(cmd, 0, MAX_COMMAND_SIZE);
+    cmd_len = 0;
+  }
+
+  free(cmd);
+  if (line) free(line);
+  wordfree(&full_path);
+  fclose(f);
+}
+
+void* shellImportThreadFp(void *arg)
+{
+  ShellThreadObj *pThread = (ShellThreadObj*)arg;
+  for (int f = 0; f < shellSQLFileNum; ++f) {
+    if (f % pThread->totalThreads == pThread->threadIndex) {
+      char *SQLFileName = shellSQLFiles[f];
+      shellSourceFile(pThread->taos, SQLFileName);
+    }
+  }
+
+  return NULL;
+}
+
+static void shellRunImportThreads(struct arguments* args)
+{
+  pthread_attr_t thattr;
+  ShellThreadObj *threadObj = (ShellThreadObj *)calloc(args->threadNum, sizeof(ShellThreadObj));
+  for (int t = 0; t < args->threadNum; ++t) {
+    ShellThreadObj *pThread = threadObj + t;
+    pThread->threadIndex = t;
+    pThread->totalThreads = args->threadNum;
+    pThread->taos = taos_connect(args->host, args->user, args->password, args->database, tsMgmtShellPort);
+    if (pThread->taos == NULL) {
+      fprintf(stderr, "ERROR: thread:%d failed connect to TDengine, error:%s\n", pThread->threadIndex, taos_errstr(pThread->taos));
+      exit(0);
+    }
+
+    pthread_attr_init(&thattr);
+    pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
+
+    if (pthread_create(&(pThread->threadID), &thattr, shellImportThreadFp, (void*)pThread) != 0) {
+      fprintf(stderr, "ERROR: thread:%d failed to start\n", pThread->threadIndex);
+      exit(0);
+    }
+  }
+
+  for (int t = 0; t < args->threadNum; ++t) {
+    pthread_join(threadObj[t].threadID, NULL);
+  }
+
+  for (int t = 0; t < args->threadNum; ++t) {
+    taos_close(threadObj[t].taos);
+  }
+  free(threadObj);
+}
+
+void source_dir(TAOS* con, struct arguments* args) {
+  shellGetDirectoryFileList(args->dir);
+  int64_t start = taosGetTimestampMs();
+
+  if (shellTablesSQLFile[0] != 0) {
+    shellSourceFile(con, shellTablesSQLFile);
+    int64_t end = taosGetTimestampMs();
+    fprintf(stdout, "import %s finished, time spent %.2f seconds\n", shellTablesSQLFile, (end - start) / 1000.0);
+  }
+
+  shellRunImportThreads(args);
+  int64_t end = taosGetTimestampMs();
+  fprintf(stdout, "import %s finished, time spent %.2f seconds\n", args->dir, (end - start) / 1000.0);
+}
diff --git a/src/kit/shell/src/shellLinux.c b/src/kit/shell/src/shellLinux.c
index 70e87525256b4907baaf8662f1df683de117d88e..e9e988c6c687a8eaefd858d6628f50f45a142af7 100644
--- a/src/kit/shell/src/shellLinux.c
+++ b/src/kit/shell/src/shellLinux.c
@@ -41,6 +41,8 @@ static struct argp_option options[] = {
   {"commands",   's', "COMMANDS",   0,                   "Commands to run without enter the shell."},
   {"raw-time",   'r', 0,            0,                   "Output time as uint64_t."},
   {"file",       'f', "FILE",       0,                   "Script to run without enter the shell."},
+  {"directory",  'D', "DIRECTORY",  0,                   "Use multi-thread to import all SQL files in the directory separately."},
+  {"thread",     'T', "THREADNUM",  0,                   "Number of threads when using multi-thread to import data."},
   {"database",   'd', "DATABASE",   0,                   "Database to use when connecting to the server."},
   {"timezone",   't', "TIMEZONE",   0,                   "Time zone of the shell, default is local."},
   {0}};
@@ -90,6 +92,17 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
       strcpy(arguments->file, full_path.we_wordv[0]);
       wordfree(&full_path);
       break;
+    case 'D':
+      if (wordexp(arg, &full_path, 0) != 0) {
+        fprintf(stderr, "Invalid path %s\n", arg);
+        return -1;
+      }
+      strcpy(arguments->dir, full_path.we_wordv[0]);
+      wordfree(&full_path);
+      break;
+    case 'T':
+      arguments->threadNum = atoi(arg);
+      break;
     case 'd':
       arguments->database = arg;
       break;
diff --git a/src/kit/shell/src/shellMain.c b/src/kit/shell/src/shellMain.c
index 82333020f15fd1c1c760c5efb5e29080c9311201..a7b7e8383bafab2f76682488d131c0d2bfbe65d3 100644
--- a/src/kit/shell/src/shellMain.c
+++ b/src/kit/shell/src/shellMain.c
@@ -62,7 +62,19 @@ int checkVersion() {
 }
 
 // Global configurations
-struct arguments args = {NULL, NULL, NULL, NULL, NULL, false, false, "\0", NULL};
+struct arguments args = {
+  .host = NULL,
+  .password = NULL,
+  .user = NULL,
+  .database = NULL,
+  .timezone = NULL,
+  .is_raw_time = false,
+  .is_use_passwd = false,
+  .file = "\0",
+  .dir = "\0",
+  .threadNum = 5,
+  .commands = NULL
+};
 
 /*
  * Main function.
diff --git a/src/system/detail/src/mgmtConn.c b/src/system/detail/src/mgmtConn.c
index 13275300a6f2cc024b17a48346fcb148ec85e1f5..b440a1042e30756f50481f63afb5d82c37c5afc7 100644
--- a/src/system/detail/src/mgmtConn.c
+++ b/src/system/detail/src/mgmtConn.c
@@ -48,7 +48,7 @@ int mgmtGetConns(SShowObj *pShow, SConnObj *pConn) {
     pConn = pAcct->pConn;
     SConnInfo *pConnInfo = pConnShow->connInfo;
 
-    while (pConn) {
+    while (pConn && pConn->pUser) {
       strcpy(pConnInfo->user, pConn->pUser->user);
       pConnInfo->ip = pConn->ip;
       pConnInfo->port = pConn->port;
diff --git a/src/system/detail/src/mgmtVgroup.c b/src/system/detail/src/mgmtVgroup.c
index 60ce5c9fa72ad7197627c9385ad6fcd52d81e9b9..c9052c094b737842ce6ceca73e44ca237cbc8ad8 100644
--- a/src/system/detail/src/mgmtVgroup.c
+++ b/src/system/detail/src/mgmtVgroup.c
@@ -40,6 +40,7 @@ void *mgmtVgroupActionAfterBatchUpdate(void *row, char *str, int size, int *ssiz
 void *mgmtVgroupActionReset(void *row, char *str, int size, int *ssize);
 void *mgmtVgroupActionDestroy(void *row, char *str, int size, int *ssize);
 bool mgmtCheckVnodeReady(SDnodeObj *pDnode, SVgObj *pVgroup, SVnodeGid *pVnode);
+char *mgmtGetVnodeStatus(SVgObj *pVgroup, SVnodeGid *pVnode);
 
 void mgmtVgroupActionInit() {
   mgmtVgroupActionFp[SDB_TYPE_INSERT] = mgmtVgroupActionInsert;
@@ -333,8 +334,8 @@ int mgmtRetrieveVgroups(SShowObj *pShow, char *data, int rows, SConnObj *pConn)
 
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
       if (pVgroup->vnodeGid[i].ip != 0) {
-        bool ready = mgmtCheckVnodeReady(NULL, pVgroup, pVgroup->vnodeGid + i);
-        strcpy(pWrite, ready ? "ready" : "unsynced");
+        char *vnodeStatus = mgmtGetVnodeStatus(pVgroup, pVgroup->vnodeGid + i);
+        strcpy(pWrite, vnodeStatus);
       } else {
         strcpy(pWrite, "null");
       }
diff --git a/src/system/detail/src/vnodeShell.c b/src/system/detail/src/vnodeShell.c
index 55aa39f747cab5b4837f56dcf0e0544a409a8e9b..3d0b9eb51fdf076834973f1b9abf0f660177b5a7 100644
--- a/src/system/detail/src/vnodeShell.c
+++ b/src/system/detail/src/vnodeShell.c
@@ -117,6 +117,9 @@ void *vnodeProcessMsgFromShell(char *msg, void *ahandle, void *thandle) {
   } else if (pMsg->msgType == TSDB_MSG_TYPE_SUBMIT) {
     if (vnodeList[vnode].vnodeStatus == TSDB_VN_STATUS_MASTER) {
       vnodeProcessShellSubmitRequest((char *) pMsg->content, pMsg->msgLen - sizeof(SIntMsg), pObj);
+    } else if (vnodeList[vnode].vnodeStatus == TSDB_VN_STATUS_SLAVE) {
+      taosSendSimpleRsp(thandle, pMsg->msgType + 1, TSDB_CODE_REDIRECT);
+      dTrace("vid:%d sid:%d, shell submit msg is redirect since in status:%s", vnode, sid, taosGetVnodeStatusStr(vnodeList[vnode].vnodeStatus));
     } else {
       taosSendSimpleRsp(thandle, pMsg->msgType + 1, TSDB_CODE_NOT_READY);
       dTrace("vid:%d sid:%d, shell submit msg is ignored since in status:%s", vnode, sid, taosGetVnodeStatusStr(vnodeList[vnode].vnodeStatus));
diff --git a/src/system/lite/src/mgmtBalance.spec.c b/src/system/lite/src/mgmtBalance.spec.c
index f55bada0a2f9676bdf86596c8b81f0ba2332f6a3..cf3e999e4f48c09df5da03d55b8084b0d1169168 100644
--- a/src/system/lite/src/mgmtBalance.spec.c
+++ b/src/system/lite/src/mgmtBalance.spec.c
@@ -52,6 +52,8 @@ bool mgmtCheckModuleInDnode(SDnodeObj *pDnode, int moduleType) {
   return tsModule[moduleType].num != 0;
 }
 
+char *mgmtGetVnodeStatus(SVgObj *pVgroup, SVnodeGid *pVnode) { return "master"; }
+
 bool mgmtCheckVnodeReady(SDnodeObj *pDnode, SVgObj *pVgroup, SVnodeGid *pVnode) { return true; }
 
 void mgmtUpdateDnodeState(SDnodeObj *pDnode, int lbStatus) {}
diff --git a/src/util/src/version.c b/src/util/src/version.c
index 4f88d6170c672925f20d2bb009f2b5b0dfa0b594..c85289fb8ad2f661ec4786c20b3e8ec6207b561d 100644
--- a/src/util/src/version.c
+++ b/src/util/src/version.c
@@ -1,5 +1,5 @@
-char version[64] = "1.6.4.2";
+char version[64] = "1.6.4.4";
 char compatible_version[64] = "1.6.1.0";
-char gitinfo[128] = "b9a62d60dc1d4a41452a9bc94e3a0924485c3a75";
-char gitinfoOfInternal[128] = "e6445addc77e8c96dcb57221fa6ab5dcde0458f7";
-char buildinfo[512] = "Built by root at 2019-12-10 10:31";
+char gitinfo[128] = "d62c5c30231d04a736d437cf428af6e12599bd9f";
+char gitinfoOfInternal[128] = "8094a32d78dc519bd883d01ac2ba6ec49ac57a80";
+char buildinfo[512] = "Built by ubuntu at 2019-12-16 21:40";