diff --git a/source/libs/tdb/inc/tdb.h b/source/libs/tdb/inc/tdb.h
index 905b08ee0bffdddd948fc62d70b0d42cf7f6a17b..eee8f8ed33274a0834eea61b879e831c530d6021 100644
--- a/source/libs/tdb/inc/tdb.h
+++ b/source/libs/tdb/inc/tdb.h
@@ -44,7 +44,7 @@ typedef struct {
 
 // TDB Operations
 TDB_EXTERN int tdbCreateDB(TDB** dbpp, tdb_db_t type);
-TDB_EXTERN int tdbOpenDB(TDB* dbp, uint32_t flags);
+TDB_EXTERN int tdbOpenDB(TDB* dbp, const char* fname, const char* dbname, uint32_t flags);
 TDB_EXTERN int tdbCloseDB(TDB* dbp, uint32_t flags);
 
 #ifdef __cplusplus
diff --git a/source/libs/tdb/src/db/tdbDB.c b/source/libs/tdb/src/db/tdbDB.c
index 2af40d8642376ed1720082a6172f845caad7d637..eaf85ea4a1930e2a6304986df43656ee07cb8e20 100644
--- a/source/libs/tdb/src/db/tdbDB.c
+++ b/source/libs/tdb/src/db/tdbDB.c
@@ -56,9 +56,28 @@ _err:
   return 0;
 }
 
-TDB_EXTERN int tdbOpenDB(TDB* dbp, uint32_t flags) {
-  // TODO
-  return 0;
+TDB_EXTERN int tdbOpenDB(TDB* dbp, const char* fname, const char* dbname, uint32_t flags) {
+  int ret = 0;
+
+  if ((dbp->fname = strdup(fname)) == NULL) {
+    ret = -1;
+    return ret;
+  }
+
+  // Create the backup file if the file not exists
+
+  // Open the file as a sub-db or a master-db
+  if (dbname) {
+    if ((dbp->dbname = strdup(dbname)) == NULL) {
+      ret = -1;
+      return ret;
+    }
+    // TODO: Open the DB as a SUB-DB in this file
+  } else {
+    // TODO: Open the DB as a MASTER-DB in this file
+  }
+
+  return ret;
 }
 
 TDB_EXTERN int tdbCloseDB(TDB* dbp, uint32_t flags) {
diff --git a/source/libs/tdb/src/inc/tdbDB.h b/source/libs/tdb/src/inc/tdbDB.h
index fca197dc39f28a1d27ed250bd940f8b1b7055e9d..d0ef9e22d0f625889ee2403c2820b6c3a5fc54d2 100644
--- a/source/libs/tdb/src/inc/tdbDB.h
+++ b/source/libs/tdb/src/inc/tdbDB.h
@@ -25,6 +25,14 @@
 extern "C" {
 #endif
 
+typedef struct {
+  // TODO
+} TDB_MPOOL;
+
+typedef struct {
+  int fd;
+} TDB_FH;
+
 struct TDB {
   pgsize_t pageSize;
   tdb_db_t type;
@@ -35,6 +43,9 @@ struct TDB {
     TDB_HASH * hash;
     TDB_HEAP * heap;
   } dbam;  // db access method
+
+  TDB_FH *   fhp;  // The backup file handle
+  TDB_MPOOL *mph;  // The memory pool handle
 };
 
 #ifdef __cplusplus
diff --git a/source/libs/tdb/test/tdbTest.cpp b/source/libs/tdb/test/tdbTest.cpp
index 38c3b0b9173fe2bfec0f6a674b63e38dedfcd1e9..f27e17f1ca8f45c8c15feb423d6b706dece79f01 100644
--- a/source/libs/tdb/test/tdbTest.cpp
+++ b/source/libs/tdb/test/tdbTest.cpp
@@ -6,9 +6,9 @@ TEST(tdb_api_test, tdb_create_open_close_db_test) {
   int  ret;
   TDB *dbp;
 
-  tdbCreateDB(&dbp, TDB_BTREE_T);
+  // tdbCreateDB(&dbp, TDB_BTREE_T);
 
-  tdbOpenDB(dbp, 0);
+  // tdbOpenDB(dbp, 0);
 
-  tdbCloseDB(dbp, 0);
+  // tdbCloseDB(dbp, 0);
 }
\ No newline at end of file