diff --git a/src/inc/twal.h b/src/inc/twal.h
index 931cf5dabab4bb640d362ff71ba1bac35b58f364..05be90775fba352ae861384d61a14fb62529b0cb 100644
--- a/src/inc/twal.h
+++ b/src/inc/twal.h
@@ -25,6 +25,11 @@ typedef enum {
   TAOS_WAL_FSYNC = 2
 } EWalType;
 
+typedef enum {
+  TAOS_WAL_NOT_KEEP = 0,
+  TAOS_WAL_KEEP = 1
+} EWalKeep;
+
 typedef struct {
   int8_t   msgType;
   int8_t   reserved[3];
@@ -36,11 +41,10 @@ typedef struct {
 } SWalHead;
 
 typedef struct {
-  int32_t vgId;
-  int32_t fsyncPeriod;  // millisecond
-  int8_t  walLevel;     // wal level
-  int8_t  wals;         // number of WAL files;
-  int8_t  keep;         // keep the wal file when closed
+  int32_t  vgId;
+  int32_t  fsyncPeriod;  // millisecond
+  EWalType walLevel;     // wal level
+  EWalKeep keep;         // keep the wal file when closed
 } SWalCfg;
 
 typedef void *  twalh;  // WAL HANDLE
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index 8cd8de62ad310729d44b549d4c44fc2bdc6a0f4c..6b6a49db932c6a64edc22177fe9bdd7cad1bc06d 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -175,7 +175,7 @@ static void *sdbGetTableFromId(int32_t tableId) {
 }
 
 static int32_t sdbInitWal() {
-  SWalCfg walCfg = {.vgId = 1, .walLevel = 2, .wals = 2, .keep = 1, .fsyncPeriod = 0};
+  SWalCfg walCfg = {.vgId = 1, .walLevel = TAOS_WAL_FSYNC, .keep = TAOS_WAL_KEEP, .fsyncPeriod = 0};
   char temp[TSDB_FILENAME_LEN];
   sprintf(temp, "%s/wal", tsMnodeDir);
   tsSdbObj.wal = walOpen(temp, &walCfg);
diff --git a/src/vnode/src/vnodeCfg.c b/src/vnode/src/vnodeCfg.c
index e8dd44b48fa6b1389439711439fe864a0fbd948d..e2e57a756640339febbbe11cdc231c5a216ff2b0 100644
--- a/src/vnode/src/vnodeCfg.c
+++ b/src/vnode/src/vnodeCfg.c
@@ -39,8 +39,7 @@ static void vnodeLoadCfg(SVnodeObj *pVnode, SCreateVnodeMsg* vnodeMsg) {
   pVnode->tsdbCfg.compression = vnodeMsg->cfg.compression;
   pVnode->walCfg.walLevel = vnodeMsg->cfg.walLevel;
   pVnode->walCfg.fsyncPeriod = vnodeMsg->cfg.fsyncPeriod;
-  pVnode->walCfg.wals = vnodeMsg->cfg.wals;
-  pVnode->walCfg.keep = 0;
+  pVnode->walCfg.keep = TAOS_WAL_NOT_KEEP;
   pVnode->syncCfg.replica = vnodeMsg->cfg.replications;
   pVnode->syncCfg.quorum = vnodeMsg->cfg.quorum;
 
diff --git a/src/wal/src/walMgmt.c b/src/wal/src/walMgmt.c
index 2ae342244d95437b82c7131e9a9ef7f2344dab36..1f6a8f5546d6d73479b868bca13de84364a0cfe0 100644
--- a/src/wal/src/walMgmt.c
+++ b/src/wal/src/walMgmt.c
@@ -128,7 +128,7 @@ void walClose(void *handle) {
 
   taosClose(pWal->fd);
 
-  if (!pWal->keep) {
+  if (pWal->keep != TAOS_WAL_KEEP) {
     int64_t fileId = -1;
     while (walGetNextFile(pWal, &fileId) >= 0) {
       snprintf(pWal->name, sizeof(pWal->name), "%s/%s%" PRId64, pWal->path, WAL_PREFIX, fileId);
diff --git a/src/wal/src/walWrite.c b/src/wal/src/walWrite.c
index 0d27ce1768ff4bc5ec5790ccbc889bca7a7f0418..b4769fe57b38d40fcdbfa0e1031e964aebf008cd 100644
--- a/src/wal/src/walWrite.c
+++ b/src/wal/src/walWrite.c
@@ -41,7 +41,7 @@ int32_t walRenew(void *handle) {
     wDebug("vgId:%d, file:%s, it is closed", pWal->vgId, pWal->name);
   }
 
-  if (pWal->keep) {
+  if (pWal->keep == TAOS_WAL_KEEP) {
     pWal->fileId = 0;
   } else {
     if (walGetNewFile(pWal, &pWal->fileId) != 0) pWal->fileId = 0;
@@ -58,7 +58,7 @@ int32_t walRenew(void *handle) {
     wDebug("vgId:%d, file:%s, it is created", pWal->vgId, pWal->name);
   }
 
-  if (!pWal->keep) {
+  if (pWal->keep != TAOS_WAL_KEEP) {
     // remove the oldest wal file
     int64_t oldFileId = -1;
     if (walGetOldFile(pWal, pWal->fileId, WAL_FILE_NUM, &oldFileId) == 0) {
@@ -144,12 +144,12 @@ int32_t walRestore(void *handle, void *pVnode, FWalWrite writeFp) {
       continue;
     }
 
-    wDebug("vgId:%d, file:%s, restore success and keep it", pWal->vgId, walName);
+    wDebug("vgId:%d, file:%s, restore success", pWal->vgId, walName);
 
     count++;
   }
 
-  if (!pWal->keep) return TSDB_CODE_SUCCESS;
+  if (pWal->keep != TAOS_WAL_KEEP) return TSDB_CODE_SUCCESS;
 
   if (count == 0) {
     wDebug("vgId:%d, wal file not exist, renew it", pWal->vgId);
@@ -173,7 +173,6 @@ int32_t walGetWalFile(void *handle, char *fileName, int64_t *fileId) {
   if (handle == NULL) return -1;
   SWal *pWal = handle;
 
-  // for keep
   if (*fileId == 0) *fileId = -1;
 
   pthread_mutex_lock(&(pWal->mutex));
diff --git a/src/wal/test/waltest.c b/src/wal/test/waltest.c
index 14e439c0727508c603e5e0ed0a5b2eba39ab631d..7a473ed18c958afa8be3c5b94b04d2fd548a56fd 100644
--- a/src/wal/test/waltest.c
+++ b/src/wal/test/waltest.c
@@ -37,7 +37,6 @@ int writeToQueue(void *pVnode, void *data, int type, void *pMsg) {
 
 int main(int argc, char *argv[]) {
   char path[128] = "/home/jhtao/test/wal";
-  int  max = 3;
   int  level = 2;
   int  total = 5;
   int  rows = 10000;
@@ -47,8 +46,6 @@ int main(int argc, char *argv[]) {
   for (int i=1; i<argc; ++i) {
     if (strcmp(argv[i], "-p")==0 && i < argc-1) {
       tstrncpy(path, argv[++i], sizeof(path));
-    } else if (strcmp(argv[i], "-m")==0 && i < argc-1) {
-      max = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-l")==0 && i < argc-1) {
       level = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-r")==0 && i < argc-1) {
@@ -66,7 +63,6 @@ int main(int argc, char *argv[]) {
     } else {
       printf("\nusage: %s [options] \n", argv[0]);
       printf("  [-p path]: wal file path default is:%s\n", path);
-      printf("  [-m max]: max wal files, default is:%d\n", max);
       printf("  [-l level]: log level, default is:%d\n", level);
       printf("  [-t total]: total wal files, default is:%d\n", total);
       printf("  [-r rows]: rows of records per wal file, default is:%d\n", rows);
@@ -82,7 +78,6 @@ int main(int argc, char *argv[]) {
 
   SWalCfg walCfg;
   walCfg.walLevel = level;
-  walCfg.wals = max;
   walCfg.keep = keep;
 
   pWal = walOpen(path, &walCfg);