diff --git a/source/dnode/vnode/CMakeLists.txt b/source/dnode/vnode/CMakeLists.txt
index f7a3f2f1097f34a6a7649c3f653867537322e4ca..c0e458219c9f76dc8d1fb9be837348704851a7a5 100644
--- a/source/dnode/vnode/CMakeLists.txt
+++ b/source/dnode/vnode/CMakeLists.txt
@@ -4,13 +4,13 @@ target_sources(
     vnode
     PRIVATE
     # vnode
+    "src/vnd/vnodeOpen.c"
     "src/vnd/vnodeArenaMAImpl.c"
     "src/vnd/vnodeBufferPool.c"
     # "src/vnd/vnodeBufferPool2.c"
     "src/vnd/vnodeCfg.c"
     "src/vnd/vnodeCommit.c"
     "src/vnd/vnodeInt.c"
-    "src/vnd/vnodeOpen.c"
     "src/vnd/vnodeQuery.c"
     "src/vnd/vnodeStateMgr.c"
     "src/vnd/vnodeWrite.c"
diff --git a/source/dnode/vnode/src/inc/vnd.h b/source/dnode/vnode/src/inc/vnd.h
index 1cdb38b65029c116d6d8b36f9600c3e45e8739f2..55b69a9e6ebd83ab1bd7d9d79b180b724d2821ee 100644
--- a/source/dnode/vnode/src/inc/vnd.h
+++ b/source/dnode/vnode/src/inc/vnd.h
@@ -30,6 +30,10 @@ extern "C" {
 #define vTrace(...) do { if (vDebugFlag & DEBUG_TRACE) { taosPrintLog("VND ", DEBUG_TRACE, vDebugFlag, __VA_ARGS__); }}    while(0)
 // clang-format on
 
+// vnodeCfg ====================
+int vnodeSaveCfg(const char* dir, const SVnodeCfg* pCfg);
+int vnodeCommitCfg(const char* dir);
+
 // vnodeModule ====================
 int vnodeScheduleTask(int (*execute)(void*), void* arg);
 
@@ -75,9 +79,9 @@ void            vmaFree(SVMemAllocator* pVMA, void* ptr);
 bool            vmaIsFull(SVMemAllocator* pVMA);
 
 // vnodeCfg.h
-extern const SVnodeCfg defaultVnodeOptions;
+extern const SVnodeCfg vnodeCfgDefault;
 
-int  vnodeValidateOptions(const SVnodeCfg*);
+int  vnodeCheckCfg(const SVnodeCfg*);
 void vnodeOptionsCopy(SVnodeCfg* pDest, const SVnodeCfg* pSrc);
 
 // For commit
diff --git a/source/dnode/vnode/src/vnd/vnodeCfg.c b/source/dnode/vnode/src/vnd/vnodeCfg.c
index ef417cabc6d7e29959e3b5929527c1fca3688671..8da9950aa754d992603a99585524b215df7b42a3 100644
--- a/source/dnode/vnode/src/vnd/vnodeCfg.c
+++ b/source/dnode/vnode/src/vnd/vnodeCfg.c
@@ -15,14 +15,99 @@
 
 #include "vnodeInt.h"
 
-const SVnodeCfg defaultVnodeOptions = {
-    .wsize = 96 * 1024 * 1024, .ssize = 1 * 1024 * 1024, .lsize = 1024, .walCfg = {.level = TAOS_WAL_WRITE}}; /* TODO */
+#define VND_INFO_FNAME     "vnode.json"
+#define VND_INFO_FNAME_TMP "vnode_tmp.json"
 
-int vnodeValidateOptions(const SVnodeCfg *pVnodeOptions) {
+static int vnodeEncodeInfo(const SVnodeCfg *pCfg, uint8_t **ppData, int *len);
+static int vnodeDecodeInfo(uint8_t *pData, int len, SVnodeCfg *pCfg);
+
+const SVnodeCfg vnodeCfgDefault = {
+    .wsize = 96 * 1024 * 1024, .ssize = 1 * 1024 * 1024, .lsize = 1024, .walCfg = {.level = TAOS_WAL_WRITE}};
+
+int vnodeCheckCfg(const SVnodeCfg *pCfg) {
+  // TODO
+  return 0;
+}
+
+int vnodeSaveCfg(const char *dir, const SVnodeCfg *pCfg) {
+  char      fname[TSDB_FILENAME_LEN];
+  TdFilePtr pFile;
+  uint8_t  *data;
+  int       len;
+
+  snprintf(fname, TSDB_FILENAME_LEN, "%s%s%s", dir, TD_DIRSEP, VND_INFO_FNAME_TMP);
+
+  // encode info
+  data = NULL;
+  len = 0;
+
+  if (vnodeEncodeInfo(pCfg, &data, &len) < 0) {
+    return -1;
+  }
+
+  // save info to a vnode_tmp.json
+  pFile = taosOpenFile(fname, TD_FILE_CREATE | TD_FILE_WRITE | TD_FILE_TRUNC);
+  if (pFile == NULL) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return -1;
+  }
+
+  if (taosWriteFile(pFile, data, len) < 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    goto _err;
+  }
+
+  if (taosFsyncFile(pFile) < 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    goto _err;
+  }
+
+  taosCloseFile(&pFile);
+
+  // free info binary
+  taosMemoryFree(data);
+
+  vInfo("vgId: %d vnode info is saved, fname: %s", pCfg->vgId, fname);
+
+  return 0;
+
+_err:
+  taosCloseFile(&pFile);
+  taosMemoryFree(data);
+  return -1;
+}
+
+int vnodeCommitCfg(const char *dir) {
+  char fname[TSDB_FILENAME_LEN];
+  char tfname[TSDB_FILENAME_LEN];
+
+  snprintf(fname, TSDB_FILENAME_LEN, "%s%s%s", dir, TD_DIRSEP, VND_INFO_FNAME);
+  snprintf(tfname, TSDB_FILENAME_LEN, "%s%s%s", dir, TD_DIRSEP, VND_INFO_FNAME_TMP);
+
+  if (taosRenameFile(tfname, fname) < 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    return -1;
+  }
+
+  return 0;
+}
+
+int vnodeLoadCfg(const char *dir) {
+  // TODO
+  return 0;
+}
+
+static int vnodeEncodeInfo(const SVnodeCfg *pCfg, uint8_t **ppData, int *len) {
   // TODO
   return 0;
 }
 
+static int vnodeDecodeInfo(uint8_t *pData, int len, SVnodeCfg *pCfg) {
+  // TODO
+  return 0;
+}
+
+#if 1  //======================================================================
 void vnodeOptionsCopy(SVnodeCfg *pDest, const SVnodeCfg *pSrc) {
   memcpy((void *)pDest, (void *)pSrc, sizeof(SVnodeCfg));
 }
@@ -46,3 +131,5 @@ int vnodeValidateTableHash(SVnodeCfg *pVnodeOptions, char *tableFName) {
 
   return TSDB_CODE_SUCCESS;
 }
+
+#endif
\ No newline at end of file
diff --git a/source/dnode/vnode/src/vnd/vnodeOpen.c b/source/dnode/vnode/src/vnd/vnodeOpen.c
index f2088577624f477c38713ca94bc81e4410f17f18..6729f7ce0c748186dcff6a28c8d68246293c984f 100644
--- a/source/dnode/vnode/src/vnd/vnodeOpen.c
+++ b/source/dnode/vnode/src/vnd/vnodeOpen.c
@@ -21,8 +21,8 @@ static int     vnodeOpenImpl(SVnode *pVnode);
 static void    vnodeCloseImpl(SVnode *pVnode);
 
 int vnodeCreate(const char *path, SVnodeCfg *pCfg, STfs *pTfs) {
-#if 0
   char dir[TSDB_FILENAME_LEN];
+
   // TODO: check if directory exists
 
   // check config
@@ -34,12 +34,11 @@ int vnodeCreate(const char *path, SVnodeCfg *pCfg, STfs *pTfs) {
   // create vnode env
   tfsMkdir(pTfs, path);
   snprintf(dir, TSDB_FILENAME_LEN, "%s%s%s", tfsGetPrimaryPath(pTfs), TD_DIRSEP, path);
-  if (vnodeSaveCfg(dir, pCfg) < 0) {
+  if (vnodeSaveCfg(dir, pCfg) < 0 || vnodeCommitCfg(dir) < 0) {
     vError("vgId: %d failed to save vnode config since %s", pCfg->vgId, tstrerror(terrno));
     return -1;
   }
 
-#endif
   return 0;
 }
 
@@ -47,7 +46,7 @@ SVnode *vnodeOpen(const char *path, const SVnodeCfg *pVnodeCfg) {
   SVnode *pVnode = NULL;
 
   // Set default options
-  SVnodeCfg cfg = defaultVnodeOptions;
+  SVnodeCfg cfg = vnodeCfgDefault;
   if (pVnodeCfg != NULL) {
     cfg.vgId = pVnodeCfg->vgId;
     cfg.msgCb = pVnodeCfg->msgCb;
@@ -59,7 +58,7 @@ SVnode *vnodeOpen(const char *path, const SVnodeCfg *pVnodeCfg) {
   }
 
   // Validate options
-  if (vnodeValidateOptions(&cfg) < 0) {
+  if (vnodeCheckCfg(&cfg) < 0) {
     // TODO
     return NULL;
   }