diff --git a/src/dnode/inc/dnodeTier.h b/src/dnode/inc/dnodeTier.h
deleted file mode 100644
index 019a4a21121eba0ded46d9730c3068c56784728d..0000000000000000000000000000000000000000
--- a/src/dnode/inc/dnodeTier.h
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
- *
- * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef TDENGINE_DNODE_TIER_H
-#define TDENGINE_DNODE_TIER_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "hash.h"
-#include "taoserror.h"
-
-#define DNODE_MAX_TIERS 3
-#define DNODE_MAX_DISKS_PER_TIER 16
-
-typedef struct {
-  int level;
-  int did;
-} SDiskID;
-
-typedef struct {
-  uint64_t size;
-  uint64_t free;
-  uint64_t nfiles;
-} SDiskMeta;
-
-typedef struct {
-  char      dir[TSDB_FILENAME_LEN];
-  SDiskMeta dmeta;
-} SDisk;
-
-typedef struct {
-  int   level;
-  int   nDisks;
-  SDisk disks[DNODE_MAX_DISKS_PER_TIER];
-} STier;
-
-typedef struct {
-  pthread_rwlock_t rwlock;
-  int              nTiers;
-  STier            tiers[DNODE_MAX_TIERS];
-  SHashObj *       map;
-} SDnodeTier;
-
-#define DNODE_PRIMARY_DISK(pDnodeTier) (&(pDnodeTier)->tiers[0].disks[0])
-
-static FORCE_INLINE int dnodeRLockTiers(SDnodeTier *pDnodeTier) {
-  int code = pthread_rwlock_rdlock(&(pDnodeTier->rwlock));
-  if (code != 0) {
-    terrno = TAOS_SYSTEM_ERROR(code);
-    return -1;
-  }
-  return 0;
-}
-
-static FORCE_INLINE int dnodeWLockTiers(SDnodeTier *pDnodeTier) {
-  int code = pthread_rwlock_wrlock(&(pDnodeTier->rwlock));
-  if (code != 0) {
-    terrno = TAOS_SYSTEM_ERROR(code);
-    return -1;
-  }
-  return 0;
-}
-
-static FORCE_INLINE int dnodeUnLockTiers(SDnodeTier *pDnodeTier) {
-  int code = pthread_rwlock_unlock(&(pDnodeTier->rwlock));
-  if (code != 0) {
-    terrno = TAOS_SYSTEM_ERROR(code);
-    return -1;
-  }
-  return 0;
-}
-
-static FORCE_INLINE SDisk *dnodeGetDisk(SDnodeTier *pDnodeTier, int level, int did) {
-  if (level < 0 || level >= pDnodeTier->nTiers) return NULL;
-
-  if (did < 0 || did >= pDnodeTier->tiers[level].nDisks) return NULL;
-
-  return &(pDnodeTier->tiers[level].disks[did]);
-}
-
-SDnodeTier *dnodeNewTier();
-void *      dnodeCloseTier(SDnodeTier *pDnodeTier);
-int         dnodeAddDisk(SDnodeTier *pDnodeTier, char *dir, int level);
-int         dnodeUpdateTiersInfo(SDnodeTier *pDnodeTier);
-int         dnodeCheckTiers(SDnodeTier *pDnodeTier);
-SDisk *     dnodeAssignDisk(SDnodeTier *pDnodeTier, int level);
-SDisk *     dnodeGetDiskByName(SDnodeTier *pDnodeTier, char *dirName);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/src/dnode/src/dnodeTier.c b/src/dnode/src/dnodeTier.c
index 0bd1a38911661a7a9781662d5e971ba2ad24ce2e..8e058a313480f2a0ba9f617324439a5d593523e5 100644
--- a/src/dnode/src/dnodeTier.c
+++ b/src/dnode/src/dnodeTier.c
@@ -14,7 +14,7 @@
  */
 
 #include "os.h"
-#include "dnodeTier.h"
+#include "dnode.h"
 
 #ifndef _DNODE_PLUGINS
 
diff --git a/src/inc/dnode.h b/src/inc/dnode.h
index 83d2a4ad9c58a77510aacf076296213779327326..ec59a33d4779f08d42b8ea28efb35de2bb85883b 100644
--- a/src/inc/dnode.h
+++ b/src/inc/dnode.h
@@ -20,6 +20,8 @@
 extern "C" {
 #endif
 
+#include "hash.h"
+#include "taoserror.h"
 #include "trpc.h"
 
 typedef struct {
@@ -69,6 +71,85 @@ void    dnodeDelayReprocessMnodeWriteMsg(void *pMsg);
 
 void    dnodeSendStatusMsgToMnode();
 
+// DNODE TIER
+#define DNODE_MAX_TIERS 3
+#define DNODE_MAX_DISKS_PER_TIER 16
+
+typedef struct {
+  int level;
+  int did;
+} SDiskID;
+
+typedef struct {
+  uint64_t size;
+  uint64_t free;
+  uint64_t nfiles;
+} SDiskMeta;
+
+typedef struct {
+  char      dir[TSDB_FILENAME_LEN];
+  SDiskMeta dmeta;
+} SDisk;
+
+typedef struct {
+  int   level;
+  int   nDisks;
+  SDisk disks[DNODE_MAX_DISKS_PER_TIER];
+} STier;
+
+typedef struct SDnodeTier {
+  pthread_rwlock_t rwlock;
+  int              nTiers;
+  STier            tiers[DNODE_MAX_TIERS];
+  SHashObj *       map;
+} SDnodeTier;
+
+#define DNODE_PRIMARY_DISK(pDnodeTier) (&(pDnodeTier)->tiers[0].disks[0])
+
+static FORCE_INLINE int dnodeRLockTiers(SDnodeTier *pDnodeTier) {
+  int code = pthread_rwlock_rdlock(&(pDnodeTier->rwlock));
+  if (code != 0) {
+    terrno = TAOS_SYSTEM_ERROR(code);
+    return -1;
+  }
+  return 0;
+}
+
+static FORCE_INLINE int dnodeWLockTiers(SDnodeTier *pDnodeTier) {
+  int code = pthread_rwlock_wrlock(&(pDnodeTier->rwlock));
+  if (code != 0) {
+    terrno = TAOS_SYSTEM_ERROR(code);
+    return -1;
+  }
+  return 0;
+}
+
+static FORCE_INLINE int dnodeUnLockTiers(SDnodeTier *pDnodeTier) {
+  int code = pthread_rwlock_unlock(&(pDnodeTier->rwlock));
+  if (code != 0) {
+    terrno = TAOS_SYSTEM_ERROR(code);
+    return -1;
+  }
+  return 0;
+}
+
+static FORCE_INLINE SDisk *dnodeGetDisk(SDnodeTier *pDnodeTier, int level, int did) {
+  if (level < 0 || level >= pDnodeTier->nTiers) return NULL;
+
+  if (did < 0 || did >= pDnodeTier->tiers[level].nDisks) return NULL;
+
+  return &(pDnodeTier->tiers[level].disks[did]);
+}
+
+SDnodeTier *dnodeNewTier();
+void *      dnodeCloseTier(SDnodeTier *pDnodeTier);
+int         dnodeAddDisk(SDnodeTier *pDnodeTier, char *dir, int level);
+int         dnodeUpdateTiersInfo(SDnodeTier *pDnodeTier);
+int         dnodeCheckTiers(SDnodeTier *pDnodeTier);
+SDisk *     dnodeAssignDisk(SDnodeTier *pDnodeTier, int level);
+SDisk *     dnodeGetDiskByName(SDnodeTier *pDnodeTier, char *dirName);
+
+
 #ifdef __cplusplus
 }
 #endif