diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index 15f06f5a3bfd8f6b6edfe86ee23955a15d2cd937..72f23881d28ebf2f5d0a27ee32f9f7335a14ea83 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -94,10 +94,6 @@ void taos_init_imp(void) {
       printf("failed to create log dir:%s\n", tsLogDir);
     }
 
-    if (mkdir(tsLogbakDir, 0755) != 0 && errno != EEXIST) {
-      printf("failed to create logbak dir:%s\n", tsLogbakDir);
-    }
-
     sprintf(temp, "%s/taoslog", tsLogDir);
     if (taosInitLog(temp, tsNumOfLogLines, 10) < 0) {
       printf("failed to open log file in directory:%s\n", tsLogDir);
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index bf9859d58c7c4859c6a65a1aad12e38a5cf3a938..77e8b76456b04301a1f556c69a4bae98970c1f37 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -126,7 +126,6 @@ extern char    tsDnodeDir[];
 extern char    tsMnodeDir[];
 extern char    tsDataDir[];
 extern char    tsLogDir[];
-extern char    tsLogbakDir[];
 extern char    tsScriptDir[];
 extern int64_t tsMsPerDay[3];
 extern char    tsVnodeBakDir[];
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index acbfd34d101f8a2d6c238742bc1f1f6ee89d7508..5250d2947e44349378e128eb0112c4ed8830f3ca 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -370,16 +370,6 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "logBakDir";
-  cfg.ptr = tsLogbakDir;
-  cfg.valType = TAOS_CFG_VTYPE_DIRECTORY;
-  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLIENT | TSDB_CFG_CTYPE_B_LOG;
-  cfg.minValue = 0;
-  cfg.maxValue = 0;
-  cfg.ptrLength = TSDB_FILENAME_LEN;
-  cfg.unitType = TAOS_CFG_UTYPE_NONE;
-  taosInitConfigOption(cfg);
-
   cfg.option = "scriptDir";
   cfg.ptr = tsScriptDir;
   cfg.valType = TAOS_CFG_VTYPE_DIRECTORY;
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index a00124098ae4782fffcd0e5cc714aea8de38cfb4..97e6f2ce6debe7ffc273ca103e3f55576da0eb31 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -106,11 +106,6 @@ int32_t dnodeInitSystem() {
    return -1;
   }
 
-  if (dnodeCreateDir(tsLogbakDir) < 0) {
-    printf("failed to create dir: %s, reason: %s\n", tsLogbakDir, strerror(errno));
-    return -1;
-  }
-
   char temp[TSDB_FILENAME_LEN];
   sprintf(temp, "%s/taosdlog", tsLogDir);
   if (taosInitLog(temp, tsNumOfLogLines, 1) < 0) {
diff --git a/src/os/inc/osDir.h b/src/os/inc/osDir.h
index e7dc04fd1532660cabfbe407c5a8045f010b2d91..17683743e3ee7ed11350c02e504cce9f379b73d9 100644
--- a/src/os/inc/osDir.h
+++ b/src/os/inc/osDir.h
@@ -24,6 +24,7 @@ extern "C" {
 void taosRemoveDir(char *rootDir);
 int  taosMkDir(const char *pathname, mode_t mode); 
 void taosRename(char* oldName, char *newName);
+void taosRemoveOldLogFiles(char *rootDir, int32_t keepDays);
 
 #ifdef __cplusplus
 }
diff --git a/src/os/src/alpine/alpineEnv.c b/src/os/src/alpine/alpineEnv.c
index 972a7ae7f1f890e4894672ece1301b363ba098b7..811d98ad7f8c34851e70ccbd190a13b74d865703 100644
--- a/src/os/src/alpine/alpineEnv.c
+++ b/src/os/src/alpine/alpineEnv.c
@@ -27,7 +27,6 @@ void osInit() {
   strcpy(tsMnodeDir, "");
   strcpy(tsDataDir, "/var/lib/taos");
   strcpy(tsLogDir, "/var/log/taos");
-  strcpy(tsLogbakDir, "/var/log/taos/bak");
   strcpy(tsScriptDir, "/etc/taos");
   strcpy(tsOsName, "Linux");
 }
\ No newline at end of file
diff --git a/src/os/src/darwin/darwinEnv.c b/src/os/src/darwin/darwinEnv.c
index 79f01c2459ca7301e8ace0c1e679a3cf1bcbfd75..6adebabec01ae378a4c5f3d82389508334210972 100644
--- a/src/os/src/darwin/darwinEnv.c
+++ b/src/os/src/darwin/darwinEnv.c
@@ -27,7 +27,6 @@ void osInit() {
   strcpy(tsMnodeDir, "");
   strcpy(tsDataDir, "~/TDengine/data");
   strcpy(tsLogDir, "~/TDengine/log");
-  strcpy(tsLogbakDir, "~/TDengine/log/bak");
   strcpy(tsScriptDir, "~/TDengine/cfg");
   strcpy(tsOsName, "Darwin");
 }
diff --git a/src/os/src/detail/osDir.c b/src/os/src/detail/osDir.c
index 7a537cdfead3a15e202b8d7d2bc5d40cff5281bc..2daee85762110398e3a7c2818df1b486778483bb 100644
--- a/src/os/src/detail/osDir.c
+++ b/src/os/src/detail/osDir.c
@@ -51,11 +51,6 @@ int taosMkDir(const char *path, mode_t mode) {
 }
 
 void taosRename(char* oldName, char *newName) {
-  if (0 == tsEnableVnodeBak) {
-    uInfo("vnode backup not enabled");
-    return;
-  }
-
   // if newName in not empty, rename return fail. 
   // the newName must be empty or does not exist
   if (rename(oldName, newName)) {
@@ -65,4 +60,48 @@ void taosRename(char* oldName, char *newName) {
   }
 }
 
+void taosRemoveOldLogFiles(char *rootDir, int32_t keepDays) {
+  DIR *dir = opendir(rootDir);
+  if (dir == NULL) return;
+
+  int64_t ms = taosGetTimestampMs();
+  struct dirent *de = NULL;
+
+  while ((de = readdir(dir)) != NULL) {
+    if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0) continue;
+
+    char filename[1024];
+    snprintf(filename, 1023, "%s/%s", rootDir, de->d_name);
+    if (de->d_type & DT_DIR) {
+      continue;
+    } else {
+      // struct stat fState;
+      // if (stat(fname, &fState) < 0) {
+      //   continue;
+      // }
+      int32_t len = strlen(filename);
+      int64_t fileMs = 0;
+      for (int i = len - 1; i >= 0; ++i) {
+        if (filename[i] == '.') {
+          fileMs = atoll(filename + i + 1);
+          break;
+        }
+      }
+
+      if (fileMs <= 0) continue;
+      int32_t days = (fileMs - ms) / 86400 + 1;
+      if (days > keepDays) {
+        (void)remove(filename);
+        uInfo("file:%s is removed, days:%d keepDays:%d", filename, days, keepDays);
+
+      } else {
+        uTrace("file:%s won't be removed, days:%d keepDays:%d", filename, days, keepDays);
+      }
+    }
+  }
+
+  closedir(dir);
+  rmdir(rootDir);
+}
+
 #endif
diff --git a/src/os/src/linux/linuxEnv.c b/src/os/src/linux/linuxEnv.c
index af3af97df2ab816155d8fbe222bdc0f1409536af..14b40a1f1857ca7789829cb64f596ff349b7c997 100644
--- a/src/os/src/linux/linuxEnv.c
+++ b/src/os/src/linux/linuxEnv.c
@@ -25,7 +25,6 @@ void osInit() {
   }
   strcpy(tsDataDir, "/var/lib/power");
   strcpy(tsLogDir, "/var/log/power");
-  strcpy(tsLogbakDir, "/var/log/power/bak");
   strcpy(tsScriptDir, "/etc/power");
 #else
   if (configDir[0] == 0) {
@@ -33,7 +32,6 @@ void osInit() {
   }
   strcpy(tsDataDir, "/var/lib/taos");
   strcpy(tsLogDir, "/var/log/taos");
-  strcpy(tsLogbakDir, "/var/log/taos/bak");
   strcpy(tsScriptDir, "/etc/taos");
 #endif
 
diff --git a/src/os/src/windows/wEnv.c b/src/os/src/windows/wEnv.c
index 2a758f31c33683411455aca21e40d5ada244a20b..8110a194904bbbc1166ac57de187de284db34a6b 100644
--- a/src/os/src/windows/wEnv.c
+++ b/src/os/src/windows/wEnv.c
@@ -30,7 +30,6 @@ void osInit() {
   strcpy(tsVnodeDir, "C:/PowerDB/data");
   strcpy(tsDataDir, "C:/PowerDB/data");
   strcpy(tsLogDir, "C:/PowerDB/log");
-  strcpy(tsLogbakDir, "C:/PowerDB/log/bak");
   strcpy(tsScriptDir, "C:/PowerDB/script");
 
 #else
@@ -41,7 +40,6 @@ void osInit() {
   strcpy(tsVnodeDir, "C:/TDengine/data");
   strcpy(tsDataDir, "C:/TDengine/data");
   strcpy(tsLogDir, "C:/TDengine/log");
-  strcpy(tsLogbakDir, "C:/TDengine/log/bak");
   strcpy(tsScriptDir, "C:/TDengine/script");
 #endif
 
diff --git a/src/util/src/tlog.c b/src/util/src/tlog.c
index ab129b0ad4ce424b30315451fbf08a74be0cfdfb..b027304437dd21055d8922f8a709fd9d184fc2a1 100644
--- a/src/util/src/tlog.c
+++ b/src/util/src/tlog.c
@@ -69,10 +69,8 @@ float   tsAvailLogDirGB = 0;
 float   tsMinimalLogDirGB = 0.1f;
 #ifdef _TD_POWER_
 char    tsLogDir[TSDB_FILENAME_LEN] = "/var/log/power";
-char    tsLogbakDir[TSDB_FILENAME_LEN] = "/var/log/power/bak";
 #else
 char    tsLogDir[TSDB_FILENAME_LEN] = "/var/log/taos";
-char    tsLogbakDir[TSDB_FILENAME_LEN] = "/var/log/taos/bak";
 #endif
 
 static SLogObj   tsLogObj = { .fileNum = 1 };
@@ -139,11 +137,25 @@ static void taosUnLockFile(int32_t fd) {
   }
 }
 
+static void taosKeepOldLog(char *oldName) {
+  if (tsLogKeepDays <= 0) return;
+
+  int64_t ms = taosGetTimestampMs();
+  char    fileName[LOG_FILE_NAME_LEN + 20];
+  snprintf(fileName, LOG_FILE_NAME_LEN + 20, "%s.%" PRId64, tsLogObj.logName, ms);
+
+  uInfo("rename log file %s to %s", oldName, fileName);
+  taosRename(oldName, fileName);
+  taosRemoveOldLogFiles(tsLogDir, tsLogKeepDays);
+}
+
 static void *taosThreadToOpenNewFile(void *param) {
-  char name[LOG_FILE_NAME_LEN + 20];
+  char keepName[LOG_FILE_NAME_LEN + 20];
+  sprintf(keepName, "%s.%d", tsLogObj.logName, tsLogObj.flag);
 
   tsLogObj.flag ^= 1;
   tsLogObj.lines = 0;
+  char name[LOG_FILE_NAME_LEN + 20];
   sprintf(name, "%s.%d", tsLogObj.logName, tsLogObj.flag);
 
   umask(0);
@@ -153,6 +165,7 @@ static void *taosThreadToOpenNewFile(void *param) {
     uError("open new log file fail! fd:%d reason:%s", fd, strerror(errno));
     return NULL;
   }
+
   taosLockFile(fd);
   (void)lseek(fd, 0, SEEK_SET);
 
@@ -160,9 +173,11 @@ static void *taosThreadToOpenNewFile(void *param) {
   tsLogObj.logHandle->fd = fd;
   tsLogObj.lines = 0;
   tsLogObj.openInProgress = 0;
+  taosCloseLogByFd(oldFd);
   uInfo("new log file is opened!!!");
 
-  taosCloseLogByFd(oldFd);
+  taosKeepOldLog(keepName);
+
   return NULL;
 }
 
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 5a778156ff4fa88a798d260654edf04860d9692b..a463a2c90a7cf440d4e30735d469861d02ce3eac 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -382,7 +382,13 @@ void vnodeRelease(void *pVnodeRaw) {
     char newDir[TSDB_FILENAME_LEN] = {0};
     sprintf(rootDir, "%s/vnode%d", tsVnodeDir, vgId);
     sprintf(newDir, "%s/vnode%d", tsVnodeBakDir, vgId);
-    taosRename(rootDir, newDir);
+
+    if (0 == tsEnableVnodeBak) {
+      vInfo("vgId:%d, vnode backup not enabled", pVnode->vgId);
+    } else {
+      taosRename(rootDir, newDir);
+    }
+
     taosRemoveDir(rootDir);
     dnodeSendStatusMsgToMnode();
   }