diff --git a/source/dnode/vnode/src/tsdb/dev/dev.h b/source/dnode/vnode/src/tsdb/dev/dev.h
index 401618f980..88ae1852a3 100644
--- a/source/dnode/vnode/src/tsdb/dev/dev.h
+++ b/source/dnode/vnode/src/tsdb/dev/dev.h
@@ -28,6 +28,8 @@ extern "C" {
 
 #include "tsdbFileOp.h"
 
+#include "tsdbFSet.h"
+
 #include "tsdbFS.h"
 
 #include "tsdbSttFWriter.h"
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
index 9e4ec99a4b..8d6f510e96 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFS.c
@@ -16,28 +16,36 @@
 #include "dev.h"
 
 static int32_t create_file_system(STsdb *pTsdb, struct STFileSystem **ppFS) {
-  ppFS[0] = taosMemoryCalloc(1, sizeof(*ppFS[0]));
-  if (ppFS[0] == NULL) return TSDB_CODE_OUT_OF_MEMORY;
+  if ((ppFS[0] = taosMemoryCalloc(1, sizeof(*ppFS[0]))) == NULL) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  if ((ppFS[0]->aFileSet = taosArrayInit(16, sizeof(struct SFileSet))) == NULL) {
+    taosMemoryFree(ppFS[0]);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
 
   ppFS[0]->pTsdb = pTsdb;
+  tsem_init(&ppFS[0]->canEdit, 0, 1);
+
   return 0;
 }
 
 static int32_t destroy_file_system(struct STFileSystem **ppFS) {
   if (ppFS[0]) {
-    taosMemoryFree(ppFS[0]->aFileSet);
+    taosArrayDestroy(ppFS[0]->aFileSet);
+    tsem_destroy(&ppFS[0]->canEdit);
     taosMemoryFree(ppFS[0]);
     ppFS[0] = NULL;
   }
   return 0;
 }
 
-static int32_t get_current_file_name(STsdb *pTsdb, char fname[]) {
-  snprintf(fname, TSDB_FILENAME_LEN, "%s%s%s", pTsdb->path, TD_DIRSEP, "current.json");
-  return 0;
+static int32_t get_current_json(STsdb *pTsdb, char fname[]) {
+  return snprintf(fname, TSDB_FILENAME_LEN, "%s%s%s", pTsdb->path, TD_DIRSEP, "current.json"), 0;
 }
 
-static int32_t get_temp_current_file_name(STsdb *pTsdb, char fname[], EFsEditType etype) {
+static int32_t get_current_temp(STsdb *pTsdb, char fname[], EFsEditType etype) {
   switch (etype) {
     case TSDB_FS_EDIT_COMMIT:
       snprintf(fname, TSDB_FILENAME_LEN, "%s%s%s", pTsdb->path, TD_DIRSEP, "current.json.commit");
@@ -50,23 +58,97 @@ static int32_t get_temp_current_file_name(STsdb *pTsdb, char fname[], EFsEditTyp
   return 0;
 }
 
+static int32_t save_fs_to_file(struct STFileSystem *pFS, const char *fname) {
+  ASSERTS(0, "TODO: Not implemented yet");
+  return 0;
+}
+
+static int32_t load_fs_from_file(const char *fname, struct STFileSystem *pFS) {
+  ASSERTS(0, "TODO: Not implemented yet");
+  return 0;
+}
+
+static int32_t commit_edit(struct STFileSystem *pFS, EFsEditType etype) {
+  ASSERTS(0, "TODO: Not implemented yet");
+  return 0;
+}
+
+static int32_t abort_edit(struct STFileSystem *pFS, EFsEditType etype) {
+  ASSERTS(0, "TODO: Not implemented yet");
+  return 0;
+}
+
 static int32_t open_file_system(struct STFileSystem *pFS, int8_t rollback) {
-  // TODO
+  int32_t code = 0;
+  int32_t lino;
+  STsdb  *pTsdb = pFS->pTsdb;
+
+  if (0) {
+    ASSERTS(0, "Not implemented yet");
+  } else {
+    char current_json[TSDB_FILENAME_LEN];
+    char current_json_commit[TSDB_FILENAME_LEN];
+    char current_json_t[TSDB_FILENAME_LEN];
+
+    get_current_json(pTsdb, current_json);
+    get_current_temp(pTsdb, current_json_commit, TSDB_FS_EDIT_COMMIT);
+    get_current_temp(pTsdb, current_json_t, TSDB_FS_EDIT_MERGE);
+
+    if (taosCheckExistFile(current_json)) {  // current.json exists
+      code = load_fs_from_file(current_json, pFS);
+      TSDB_CHECK_CODE(code, lino, _exit);
+
+      // check current.json.commit existence
+      if (taosCheckExistFile(current_json_commit)) {
+        if (rollback) {
+          code = commit_edit(pFS, TSDB_FS_EDIT_COMMIT);
+          TSDB_CHECK_CODE(code, lino, _exit);
+        } else {
+          code = abort_edit(pFS, TSDB_FS_EDIT_COMMIT);
+          TSDB_CHECK_CODE(code, lino, _exit);
+        }
+      } else {
+        ASSERTS(1, "Do nothing");
+      }
+
+      // check current.json.t existence
+      if (taosCheckExistFile(current_json_t)) {
+        code = abort_edit(pFS, TSDB_FS_EDIT_MERGE);
+        TSDB_CHECK_CODE(code, lino, _exit);
+      }
+    } else {
+      code = save_fs_to_file(pFS, current_json);
+      TSDB_CHECK_CODE(code, lino, _exit);
+    }
+  }
+
+_exit:
+  if (code) {
+    tsdbError("vgId:%d %s failed at line %d since %s",  //
+              TD_VID(pTsdb->pVnode),                    //
+              __func__,                                 //
+              lino,                                     //
+              tstrerror(code));
+  } else {
+    tsdbInfo("vgId:%d %s success",   //
+             TD_VID(pTsdb->pVnode),  //
+             __func__);
+  }
   return 0;
 }
 
 static int32_t close_file_system(struct STFileSystem *pFS) {
-  // TODO
+  ASSERTS(0, "TODO: Not implemented yet");
   return 0;
 }
 
 static int32_t write_fs_to_file(struct STFileSystem *pFS, const char *fname) {
-  // TODO
+  ASSERTS(0, "TODO: Not implemented yet");
   return 0;
 }
 
 static int32_t read_fs_from_file(struct STFileSystem *pFS, const char *fname) {
-  // TODO
+  ASSERTS(0, "TODO: Not implemented yet");
   return 0;
 }
 
@@ -78,14 +160,22 @@ int32_t tsdbOpenFileSystem(STsdb *pTsdb, struct STFileSystem **ppFS, int8_t roll
   TSDB_CHECK_CODE(code, lino, _exit);
 
   code = open_file_system(ppFS[0], rollback);
-  TSDB_CHECK_CODE(code, lino, _exit);
+  if (code) {
+    destroy_file_system(ppFS);
+    TSDB_CHECK_CODE(code, lino, _exit);
+  }
 
 _exit:
   if (code) {
-    tsdbError("vgId:%d %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
-    if (ppFS[0]) destroy_file_system(ppFS);
+    tsdbError("vgId:%d %s failed at line %d since %s",  //
+              TD_VID(pTsdb->pVnode),                    //
+              __func__,                                 //
+              lino,                                     //
+              tstrerror(code));
   } else {
-    tsdbInfo("vgId:%d %s success", TD_VID(pTsdb->pVnode), __func__);
+    tsdbInfo("vgId:%d %s success",   //
+             TD_VID(pTsdb->pVnode),  //
+             __func__);
   }
   return 0;
 }
@@ -103,7 +193,7 @@ int32_t tsdbFileSystemEditBegin(struct STFileSystem *pFS, const SArray *aFileOp,
   int32_t lino = 0;
   char    fname[TSDB_FILENAME_LEN];
 
-  get_temp_current_file_name(pFS->pTsdb, fname, etype);
+  get_current_temp(pFS->pTsdb, fname, etype);
 
   tsem_wait(&pFS->canEdit);
 
@@ -127,8 +217,8 @@ int32_t tsdbFileSystemEditCommit(struct STFileSystem *pFS, EFsEditType etype) {
   char    ofname[TSDB_FILENAME_LEN];
   char    nfname[TSDB_FILENAME_LEN];
 
-  get_current_file_name(pFS->pTsdb, nfname);
-  get_temp_current_file_name(pFS->pTsdb, ofname, etype);
+  get_current_json(pFS->pTsdb, nfname);
+  get_current_temp(pFS->pTsdb, ofname, etype);
 
   code = taosRenameFile(ofname, nfname);
   if (code) {
@@ -153,7 +243,7 @@ int32_t tsdbFileSystemEditAbort(struct STFileSystem *pFS, EFsEditType etype) {
   int32_t lino = 0;
   char    fname[TSDB_FILENAME_LEN];
 
-  get_temp_current_file_name(pFS->pTsdb, fname, etype);
+  get_current_temp(pFS->pTsdb, fname, etype);
 
   code = taosRemoveFile(fname);
   TSDB_CHECK_CODE(code, lino, _exit);
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h b/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
index 6b22914670..f4d6dc5dd0 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbFS.h
@@ -41,10 +41,9 @@ int32_t tsdbFileSystemEditAbort(struct STFileSystem *pFS, EFsEditType etype);
 
 /* Exposed Structs */
 struct STFileSystem {
-  STsdb           *pTsdb;
-  tsem_t           canEdit;
-  int32_t          nFileSet;
-  struct SFileSet *aFileSet;
+  STsdb  *pTsdb;
+  tsem_t  canEdit;
+  SArray *aFileSet;  // SArray<struct SFileSet>
 };
 
 #ifdef __cplusplus
diff --git a/source/dnode/vnode/src/tsdb/tsdbFS.c b/source/dnode/vnode/src/tsdb/tsdbFS.c
index 5519d43012..957173d515 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS.c
@@ -290,7 +290,7 @@ static void tsdbGetCurrentFName(STsdb *pTsdb, char *current, char *current_t) {
   }
 }
 
-static int32_t tsdbLoadFSFromFile(const char *fname, STsdbFS *pFS) {
+static int32_t load_fs_from_file(const char *fname, STsdbFS *pFS) {
   int32_t  code = 0;
   int32_t  lino = 0;
   uint8_t *pData = NULL;
@@ -724,7 +724,7 @@ int32_t tsdbFSCommit(STsdb *pTsdb) {
   code = tsdbFSCreate(&fs);
   TSDB_CHECK_CODE(code, lino, _exit);
 
-  code = tsdbLoadFSFromFile(current, &fs);
+  code = load_fs_from_file(current, &fs);
   TSDB_CHECK_CODE(code, lino, _exit);
 
   // apply file change
@@ -769,7 +769,7 @@ int32_t tsdbFSOpen(STsdb *pTsdb, int8_t rollback) {
   tsdbGetCurrentFName(pTsdb, current, current_t);
 
   if (taosCheckExistFile(current)) {
-    code = tsdbLoadFSFromFile(current, &pTsdb->fs);
+    code = load_fs_from_file(current, &pTsdb->fs);
     TSDB_CHECK_CODE(code, lino, _exit);
 
     if (taosCheckExistFile(current_t)) {