diff --git a/.gitignore b/.gitignore
index 57b5c7ce..5d562c0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,4 @@ thirdparty
 output
 .build
 src/version.cc
+.DS_Store
diff --git a/src/sdk/bfs_c.cc b/src/sdk/bfs_c.cc
index 75ce0795..4727d976 100644
--- a/src/sdk/bfs_c.cc
+++ b/src/sdk/bfs_c.cc
@@ -340,8 +340,8 @@ int bfs_du(bfs_fs_t* fs, const char* path) {
 int bfs_rm_dir(bfs_fs_t* fs, const char* path, bool recursive) {
     return fs->bfs_fs->DeleteDirectory(path, recursive);
 }
-
-int bfs_change_bfs_fslica_num(bfs_fs_t* fs, const char* path,
+    
+int bfs_change_replica_num(bfs_fs_t* fs, const char* path,
         const char* bfs_fslica_num) {
     if (!isdigit(*bfs_fslica_num)) {
         return -1;
@@ -374,5 +374,24 @@ int bfs_location(bfs_fs_t* fs, const char* path) {
     return 0;
 }
 
+int bfs_status(bfs_fs_t* fs, char* &status){
+    std::string stat_name("StatAll");    
+    std::string result;
+    int32_t ret = fs->bfs_fs->SysStat(stat_name, &result);  
+    if(ret !=0){
+        return ret;       
+    } 
+    if(result.length()>0){
+       if(status != NULL)
+            delete []status;
+        status=new char[result.length()+1];
+        strcpy(status,result.c_str());     
+        return 0;
+    }else{
+        return -9;
+    }    
+    
+}
+
 }
 /* vim: set expandtab ts=4 sw=4 sts=4 tw=100: */
diff --git a/src/sdk/bfs_c.h b/src/sdk/bfs_c.h
index 33c54719..ab63a7fc 100644
--- a/src/sdk/bfs_c.h
+++ b/src/sdk/bfs_c.h
@@ -38,6 +38,7 @@ int bfs_rm_dir(bfs_fs_t* fs, const char* path, bool recursive);
 int bfs_change_replica_num(bfs_fs_t* fs, const char* path, const char* replica_num);
 int bfs_chmod(bfs_fs_t* fs, const char* str_mode, const char* path);
 int bfs_location(bfs_fs_t* fs, const char* path);
+int bfs_status(bfs_fs_t* fs, char*  &status);
 
 #ifdef __cplusplus
 }/*end extern "C" */
diff --git a/src/sdk/fs_impl.cc b/src/sdk/fs_impl.cc
index 473567f6..c000c0d0 100644
--- a/src/sdk/fs_impl.cc
+++ b/src/sdk/fs_impl.cc
@@ -453,7 +453,7 @@ int32_t FSImpl::Rename(const char* oldpath, const char* newpath) {
     return OK;
 }
 int32_t FSImpl::ChangeReplicaNum(const char* file_name, int32_t replica_num) {
-    /*
+    
     ChangeReplicaNumRequest request;
     ChangeReplicaNumResponse response;
     request.set_file_name(file_name);
@@ -471,8 +471,8 @@ int32_t FSImpl::ChangeReplicaNum(const char* file_name, int32_t replica_num) {
                 file_name, replica_num, StatusCode_Name(response.status()).c_str());
         return GetErrorCode(response.status());
     }
-    */
-    return PERMISSION_DENIED;
+    
+    return OK;
 }
 
 int32_t FSImpl::Symlink(const char* src, const char* dst)