diff --git a/src/os/inc/osDir.h b/src/os/inc/osDir.h
index 73e4b216e6c12a1bfabb6df1cd9fa6efbd45d9d7..e7dc04fd1532660cabfbe407c5a8045f010b2d91 100644
--- a/src/os/inc/osDir.h
+++ b/src/os/inc/osDir.h
@@ -23,7 +23,7 @@ extern "C" {
 // TAOS_OS_FUNC_DIR
 void taosRemoveDir(char *rootDir);
 int  taosMkDir(const char *pathname, mode_t mode); 
-void taosMvDir(char* destDir, char *srcDir);
+void taosRename(char* oldName, char *newName);
 
 #ifdef __cplusplus
 }
diff --git a/src/os/src/detail/osDir.c b/src/os/src/detail/osDir.c
index 9496b74405f4c978675297176cf73f2c09022463..7a537cdfead3a15e202b8d7d2bc5d40cff5281bc 100644
--- a/src/os/src/detail/osDir.c
+++ b/src/os/src/detail/osDir.c
@@ -50,18 +50,19 @@ int taosMkDir(const char *path, mode_t mode) {
   return code;
 }
 
-void taosMvDir(char* destDir, char *srcDir) {
+void taosRename(char* oldName, char *newName) {
   if (0 == tsEnableVnodeBak) {
     uInfo("vnode backup not enabled");
     return;
   }
 
-  char shellCmd[1024+1] = {0}; 
-  
-  //(void)snprintf(shellCmd, 1024, "cp -rf %s %s", srcDir, destDir);
-  (void)snprintf(shellCmd, 1024, "mv %s %s", srcDir, destDir);
-  taosSystem(shellCmd);
-  uInfo("shell cmd:%s is executed", shellCmd);
+  // if newName in not empty, rename return fail. 
+  // the newName must be empty or does not exist
+  if (rename(oldName, newName)) {
+    uError("%s is modify to %s fail, reason:%s", oldName, newName, strerror(errno));
+  } else {
+    uInfo("%s is modify to %s success!", oldName, newName);
+  }
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index e5536bfaafd44c5e043c45bcdb1c3840e06e86ab..3c9da7fd233d744ded167bb716b68b90dcf01c78 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -358,9 +358,11 @@ void vnodeRelease(void *pVnodeRaw) {
   taosTFree(pVnode->rootDir);
 
   if (pVnode->dropped) {
-    char rootDir[TSDB_FILENAME_LEN] = {0};
+    char rootDir[TSDB_FILENAME_LEN] = {0};    
+    char newDir[TSDB_FILENAME_LEN] = {0};
     sprintf(rootDir, "%s/vnode%d", tsVnodeDir, vgId);
-    taosMvDir(tsVnodeBakDir, rootDir);
+    sprintf(newDir, "%s/vnode%d", tsVnodeBakDir, vgId);
+    taosRename(rootDir, newDir);
     taosRemoveDir(rootDir);
     dnodeSendStatusMsgToMnode();
   }