diff --git a/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
index 5f434702ed..e42a7cab8f 100644
--- a/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
+++ b/source/dnode/vnode/src/tsdb/dev/inc/tsdbFSet.h
@@ -51,10 +51,10 @@ struct STFileOp {
 };
 
 typedef struct SSttLvl {
-  SRBTreeNode rbtn;
   int32_t     lvl;      // level
   int32_t     nstt;     // number of .stt files on this level
   SRBTree     sttTree;  // .stt file tree, sorted by cid
+  SRBTreeNode rbtn;
 } SSttLvl;
 
 struct STFileSet {
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
index df2003ec14..0b6f368662 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
@@ -165,7 +165,7 @@ _exit:
   return code;
 }
 
-static int32_t save_fs(int64_t eid, SArray *aTFileSet, const char *fname) {
+static int32_t save_fs(SArray *aTFileSet, const char *fname) {
   int32_t code = 0;
   int32_t lino = 0;
 
@@ -178,31 +178,21 @@ static int32_t save_fs(int64_t eid, SArray *aTFileSet, const char *fname) {
     TSDB_CHECK_CODE(code, lino, _exit);
   }
 
-  // eid
-  if (cJSON_AddNumberToObject(json, "eid", eid) == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    TSDB_CHECK_CODE(code, lino, _exit);
-  }
-
   // fset
   cJSON *ajson = cJSON_AddArrayToObject(json, "fset");
   if (ajson == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    TSDB_CHECK_CODE(code, lino, _exit);
+    TSDB_CHECK_CODE(code = TSDB_CODE_OUT_OF_MEMORY, lino, _exit);
   }
   for (int32_t i = 0; i < taosArrayGetSize(aTFileSet); i++) {
     STFileSet *pFileSet = (STFileSet *)taosArrayGet(aTFileSet, i);
     cJSON     *item;
 
-    if ((item = cJSON_CreateObject()) == NULL) {
-      code = TSDB_CODE_OUT_OF_MEMORY;
-      TSDB_CHECK_CODE(code, lino, _exit);
-    }
+    item = cJSON_CreateObject();
+    if (!item) TSDB_CHECK_CODE(code = TSDB_CODE_OUT_OF_MEMORY, lino, _exit);
+    cJSON_AddItemToArray(ajson, item);
 
     code = tsdbFileSetToJson(pFileSet, item);
     TSDB_CHECK_CODE(code, lino, _exit);
-
-    cJSON_AddItemToArray(ajson, item);
   }
 
   code = save_json(json, fname);
@@ -396,7 +386,7 @@ static int32_t open_fs(STFileSystem *fs, int8_t rollback) {
     code = scan_and_fix_fs(fs);
     TSDB_CHECK_CODE(code, lino, _exit);
   } else {
-    code = save_fs(0, fs->cstate, fCurrent);
+    code = save_fs(fs->cstate, fCurrent);
     TSDB_CHECK_CODE(code, lino, _exit);
   }
 
@@ -521,7 +511,7 @@ int32_t tsdbFSEditBegin(STFileSystem *fs, int64_t eid, const SArray *aFileOp, EF
   TSDB_CHECK_CODE(code, lino, _exit);
 
   // save fs
-  code = save_fs(fs->eid, fs->nstate, current_t);
+  code = save_fs(fs->nstate, current_t);
   TSDB_CHECK_CODE(code, lino, _exit);
 
 _exit:
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.c b/source/dnode/vnode/src/tsdb/dev/tsdbFSet.c
index 3be40ba1ae..f9f20462a2 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFSet.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFSet.c
@@ -20,7 +20,7 @@ static int32_t stt_lvl_to_json(const SSttLvl *lvl, cJSON *json) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
 
-  cJSON *ajson = cJSON_AddArrayToObject(json, "stt");
+  cJSON *ajson = cJSON_AddArrayToObject(json, "files");
   if (ajson == NULL) return TSDB_CODE_OUT_OF_MEMORY;
 
   SRBTreeIter iter = tRBTreeIterCreate(&lvl->sttTree, 1);
@@ -29,14 +29,10 @@ static int32_t stt_lvl_to_json(const SSttLvl *lvl, cJSON *json) {
 
     cJSON *item = cJSON_CreateObject();
     if (item == NULL) return TSDB_CODE_OUT_OF_MEMORY;
+    cJSON_AddItemToArray(ajson, item);
 
     int32_t code = tsdbTFileToJson(&fobj->f, item);
-    if (code) {
-      cJSON_Delete(item);
-      return code;
-    }
-
-    cJSON_AddItemToArray(ajson, item);
+    if (code) return code;
   }
 
   return 0;
@@ -69,9 +65,7 @@ int32_t tsdbFileSetToJson(const STFileSet *fset, cJSON *json) {
   }
 
   for (int32_t ftype = TSDB_FTYPE_MIN; ftype < TSDB_FTYPE_MAX; ++ftype) {
-    if (fset->farr[ftype] == NULL) {
-      continue;
-    }
+    if (fset->farr[ftype] == NULL) continue;
 
     code = tsdbTFileToJson(&fset->farr[ftype]->f, json);
     if (code) return code;
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFile.c b/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
index 5a1ab08448..2b6375a30e 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFile.c
@@ -203,10 +203,13 @@ int32_t tsdbTFileClear(STFile *pFile) {
 }
 
 int32_t tsdbTFileToJson(const STFile *file, cJSON *json) {
-  cJSON *tjson = cJSON_AddObjectToObject(json, g_tfile_info[file->type].suffix);
-  if (tjson == NULL) return TSDB_CODE_OUT_OF_MEMORY;
-
-  return g_tfile_info[file->type].to_json(file, tjson);
+  if (file->type == TSDB_FTYPE_STT) {
+    return g_tfile_info[file->type].to_json(file, json);
+  } else {
+    cJSON *item = cJSON_AddObjectToObject(json, g_tfile_info[file->type].suffix);
+    if (item == NULL) return TSDB_CODE_OUT_OF_MEMORY;
+    return g_tfile_info[file->type].to_json(file, item);
+  }
 }
 
 int32_t tsdbTFileFromJson(const cJSON *json, tsdb_ftype_t ftype, STFile **f) {