diff --git a/src/client/vfs_legacy/filesystem/dir_cache.cpp b/src/client/vfs_legacy/filesystem/dir_cache.cpp
index 3b844cfc5..b879fe48a 100644
--- a/src/client/vfs_legacy/filesystem/dir_cache.cpp
+++ b/src/client/vfs_legacy/filesystem/dir_cache.cpp
@@ -33,6 +33,7 @@ namespace dingofs {
 namespace client {
 namespace filesystem {
 
+using metrics::client::vfs_legacy::DirCacheMetric;
 using utils::ReadLockGuard;
 using utils::RWLock;
 using utils::TimeSpec;
diff --git a/src/client/vfs_legacy/filesystem/dir_cache.h b/src/client/vfs_legacy/filesystem/dir_cache.h
index a0b87b5c2..ba20e19ce 100644
--- a/src/client/vfs_legacy/filesystem/dir_cache.h
+++ b/src/client/vfs_legacy/filesystem/dir_cache.h
@@ -28,7 +28,7 @@
 
 #include "absl/container/btree_map.h"
 #include "client/vfs_legacy/filesystem/meta.h"
-#include "client/vfs_legacy/filesystem/metric.h"
+#include "metrics/client/vfs_legacy/dir_cache.h"
 #include "options/client/vfs_legacy/vfs_legacy_option.h"
 #include "utils/concurrent/concurrent.h"
 #include "utils/lru_cache.h"
@@ -98,7 +98,7 @@ class DirCache {
   DirCacheOption option_;
   std::shared_ptr<LRUType> lru_;
   std::shared_ptr<MessageQueueType> mq_;
-  std::shared_ptr<DirCacheMetric> metric_;
+  std::shared_ptr<metrics::client::vfs_legacy::DirCacheMetric> metric_;
 };
 
 }  // namespace filesystem
diff --git a/src/client/vfs_legacy/filesystem/metric.h b/src/client/vfs_legacy/filesystem/metric.h
deleted file mode 100644
index d086dffd1..000000000
--- a/src/client/vfs_legacy/filesystem/metric.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- *  Copyright (c) 2023 NetEase Inc.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-/*
- * Project: Dingofs
- * Created Date: 2023-07-13
- * Author: Jingli Chen (Wine93)
- */
-
-#ifndef DINGOFS_SRC_CLIENT_FILESYSTEM_METRIC_H_
-#define DINGOFS_SRC_CLIENT_FILESYSTEM_METRIC_H_
-
-#include <bvar/bvar.h>
-
-#include <string>
-
-namespace dingofs {
-namespace client {
-namespace filesystem {
-
-class DirCacheMetric {
- public:
-  DirCacheMetric() = default;
-
-  void AddEntries(int64_t n) { metric_.nentries << n; }
-
- private:
-  struct Metric {
-    Metric() : nentries("filesystem_dircache", "nentries") {}
-    bvar::Adder<int64_t> nentries;
-  };
-
-  Metric metric_;
-};
-
-class OpenfilesMetric {
- public:
-  OpenfilesMetric() = default;
-
-  void AddOpenfiles(int64_t n) { metric_.nfiles << n; }
-
- private:
-  struct Metric {
-    Metric() : nfiles("filesystem_openfiles", "nfiles") {}
-    bvar::Adder<int64_t> nfiles;
-  };
-
-  Metric metric_;
-};
-
-}  // namespace filesystem
-}  // namespace client
-}  // namespace dingofs
-
-#endif  // DINGOFS_SRC_CLIENT_FILESYSTEM_METRIC_H_
diff --git a/src/client/vfs_legacy/filesystem/openfile.cpp b/src/client/vfs_legacy/filesystem/openfile.cpp
index 1c2c5b3a4..3fe37bd77 100644
--- a/src/client/vfs_legacy/filesystem/openfile.cpp
+++ b/src/client/vfs_legacy/filesystem/openfile.cpp
@@ -32,6 +32,7 @@ namespace dingofs {
 namespace client {
 namespace filesystem {
 
+using metrics::client::vfs_legacy::OpenfilesMetric;
 using utils::ReadLockGuard;
 using utils::WriteLockGuard;
 
diff --git a/src/client/vfs_legacy/filesystem/openfile.h b/src/client/vfs_legacy/filesystem/openfile.h
index e031719de..dbee5b459 100644
--- a/src/client/vfs_legacy/filesystem/openfile.h
+++ b/src/client/vfs_legacy/filesystem/openfile.h
@@ -28,8 +28,8 @@
 
 #include "client/vfs_legacy/filesystem/defer_sync.h"
 #include "client/vfs_legacy/filesystem/meta.h"
-#include "client/vfs_legacy/filesystem/metric.h"
 #include "client/vfs_legacy/inode_wrapper.h"
+#include "metrics/client/vfs_legacy/open_files.h"
 #include "options/client/vfs_legacy/vfs_legacy_option.h"
 
 namespace dingofs {
@@ -66,7 +66,7 @@ class OpenFiles {
   OpenFilesOption option_;
   std::shared_ptr<DeferSync> deferSync_;
   std::unordered_map<Ino, std::unique_ptr<OpenFile>> files_;
-  std::shared_ptr<OpenfilesMetric> metric_;
+  std::shared_ptr<metrics::client::vfs_legacy::OpenfilesMetric> metric_;
 };
 
 }  // namespace filesystem
diff --git a/src/metrics/client/vfs_legacy/dir_cache.h b/src/metrics/client/vfs_legacy/dir_cache.h
new file mode 100644
index 000000000..fc38fa673
--- /dev/null
+++ b/src/metrics/client/vfs_legacy/dir_cache.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2025 dingodb.com, Inc. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_DIR_CACHE_H_
+#define DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_DIR_CACHE_H_
+
+#include <bvar/bvar.h>
+
+namespace dingofs {
+namespace metrics {
+namespace client {
+namespace vfs_legacy {
+
+class DirCacheMetric {
+ public:
+  DirCacheMetric() = default;
+
+  void AddEntries(int64_t n) { metric_.nentries << n; }
+
+ private:
+  struct Metric {
+    Metric() : nentries("filesystem_dircache", "nentries") {}
+    bvar::Adder<int64_t> nentries;
+  };
+
+  Metric metric_;
+};
+
+}  // namespace vfs_legacy
+}  // namespace client
+}  // namespace metrics
+}  // namespace dingofs
+
+#endif  // DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_DIR_CACHE_H_
diff --git a/src/metrics/client/vfs_legacy/open_files.h b/src/metrics/client/vfs_legacy/open_files.h
new file mode 100644
index 000000000..da778af51
--- /dev/null
+++ b/src/metrics/client/vfs_legacy/open_files.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2025 dingodb.com, Inc. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_OPEN_FILES_H_
+#define DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_OPEN_FILES_H_
+
+#include <bvar/bvar.h>
+
+namespace dingofs {
+namespace metrics {
+namespace client {
+namespace vfs_legacy {
+
+class OpenfilesMetric {
+ public:
+  OpenfilesMetric() = default;
+
+  void AddOpenfiles(int64_t n) { metric_.nfiles << n; }
+
+ private:
+  struct Metric {
+    Metric() : nfiles("filesystem_openfiles", "nfiles") {}
+    bvar::Adder<int64_t> nfiles;
+  };
+
+  Metric metric_;
+};
+
+}  // namespace vfs_legacy
+}  // namespace client
+}  // namespace metrics
+}  // namespace dingofs
+
+#endif  // DINGOFS_SRC_METRICS_CLIENT_VFS_LEGACY_OPEN_FILES_H_