diff --git a/include/dnode/mnode/sdb/sdb.h b/include/dnode/mnode/sdb/sdb.h
index 678052e615..7a029b8f10 100644
--- a/include/dnode/mnode/sdb/sdb.h
+++ b/include/dnode/mnode/sdb/sdb.h
@@ -13,8 +13,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_MNODE_SDB_H_
-#define _TD_MNODE_SDB_H_
+#ifndef _TD_SDB_H_
+#define _TD_SDB_H_
 
 #include "cJSON.h"
 
@@ -77,4 +77,4 @@ void sdbSetFp(EMnSdb, EMnKey, SdbDeployFp, SdbEncodeFp, SdbDecodeFp, int32_t dat
 }
 #endif
 
-#endif /*_TD_MNODE_INT_H_*/
+#endif /*_TD_SDB_H_*/
diff --git a/source/dnode/mnode/sdb/inc/sdbInt.h b/source/dnode/mnode/sdb/inc/sdbInt.h
new file mode 100644
index 0000000000..1eafb0518b
--- /dev/null
+++ b/source/dnode/mnode/sdb/inc/sdbInt.h
@@ -0,0 +1,42 @@
+/*
+ * 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 _TD_SDB_INT_H_
+#define _TD_SDB_INT_H_
+
+#include "os.h"
+#include "taosmsg.h"
+#include "tlog.h"
+#include "thash.h"
+#include "tglobal.h"
+#include "sdb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// mnode log function
+#define mFatal(...) { if (mDebugFlag & DEBUG_FATAL) { taosPrintLog("MND FATAL ", 255, __VA_ARGS__); }}
+#define mError(...) { if (mDebugFlag & DEBUG_ERROR) { taosPrintLog("MND ERROR ", 255, __VA_ARGS__); }}
+#define mWarn(...)  { if (mDebugFlag & DEBUG_WARN)  { taosPrintLog("MND WARN ", 255, __VA_ARGS__); }}
+#define mInfo(...)  { if (mDebugFlag & DEBUG_INFO)  { taosPrintLog("MND ", 255, __VA_ARGS__); }}
+#define mDebug(...) { if (mDebugFlag & DEBUG_DEBUG) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
+#define mTrace(...) { if (mDebugFlag & DEBUG_TRACE) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_SDB_INT_H_*/
diff --git a/source/dnode/mnode/sdb/src/sdb.c b/source/dnode/mnode/sdb/src/sdb.c
index f92c487c7d..145895798e 100644
--- a/source/dnode/mnode/sdb/src/sdb.c
+++ b/source/dnode/mnode/sdb/src/sdb.c
@@ -14,25 +14,8 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "thash.h"
-#include "tglobal.h"
 #include "cJSON.h"
-#include "sdb.h"
-
-#include "os.h"
-#include "taosmsg.h"
-#include "tlog.h"
-extern int32_t mDebugFlag;
-
-// mnode log function
-#define mFatal(...) { if (mDebugFlag & DEBUG_FATAL) { taosPrintLog("MND FATAL ", 255, __VA_ARGS__); }}
-#define mError(...) { if (mDebugFlag & DEBUG_ERROR) { taosPrintLog("MND ERROR ", 255, __VA_ARGS__); }}
-#define mWarn(...)  { if (mDebugFlag & DEBUG_WARN)  { taosPrintLog("MND WARN ", 255, __VA_ARGS__); }}
-#define mInfo(...)  { if (mDebugFlag & DEBUG_INFO)  { taosPrintLog("MND ", 255, __VA_ARGS__); }}
-#define mDebug(...) { if (mDebugFlag & DEBUG_DEBUG) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
-#define mTrace(...) { if (mDebugFlag & DEBUG_TRACE) { taosPrintLog("MND ", mDebugFlag, __VA_ARGS__); }}
-
+#include "sdbInt.h"
 
 static struct {
   char        currDir[PATH_MAX];