diff --git a/lightrag/kg/faiss_impl.py b/lightrag/kg/faiss_impl.py
index 8c9c52c4..3e59d171 100644
--- a/lightrag/kg/faiss_impl.py
+++ b/lightrag/kg/faiss_impl.py
@@ -57,16 +57,16 @@ class FaissVectorDBStorage(BaseVectorStorage):
                     # If you have a large number of vectors, you might want IVF or other indexes.
                     # For demonstration, we use a simple IndexFlatIP.
                     self._index.value = faiss.IndexFlatIP(self._dim)
+                    # Keep a local store for metadata, IDs, etc.
+                    # Maps <int faiss_id> → metadata (including your original ID).
+                    self._id_to_meta.update({})
+                    # Attempt to load an existing index + metadata from disk
+                    self._load_faiss_index()
             else:
                 if self._index is None:
                     self._index = faiss.IndexFlatIP(self._dim)
-
-            # Keep a local store for metadata, IDs, etc.
-            # Maps <int faiss_id> → metadata (including your original ID).
-            self._id_to_meta.update({})
-
-            # Attempt to load an existing index + metadata from disk
-            self._load_faiss_index()
+                    self._id_to_meta.update({})
+                    self._load_faiss_index()
 
 
     async def upsert(self, data: dict[str, dict[str, Any]]) -> None:
diff --git a/lightrag/kg/json_doc_status_impl.py b/lightrag/kg/json_doc_status_impl.py
index 50451f95..58ee3666 100644
--- a/lightrag/kg/json_doc_status_impl.py
+++ b/lightrag/kg/json_doc_status_impl.py
@@ -26,8 +26,9 @@ class JsonDocStatusStorage(DocStatusStorage):
         self._storage_lock = get_storage_lock()
         self._data = get_namespace_data(self.namespace)
         with self._storage_lock:
-            self._data.update(load_json(self._file_name) or {})
-        logger.info(f"Loaded document status storage with {len(self._data)} records")
+            if not self._data:
+                self._data.update(load_json(self._file_name) or {})
+                logger.info(f"Loaded document status storage with {len(self._data)} records")
 
     async def filter_keys(self, keys: set[str]) -> set[str]:
         """Return keys that should be processed (not in storage or not successfully processed)"""
diff --git a/lightrag/kg/json_kv_impl.py b/lightrag/kg/json_kv_impl.py
index a53ac8f0..ee5d8a07 100644
--- a/lightrag/kg/json_kv_impl.py
+++ b/lightrag/kg/json_kv_impl.py
@@ -18,13 +18,13 @@ from .shared_storage import get_namespace_data, get_storage_lock
 class JsonKVStorage(BaseKVStorage):
     def __post_init__(self):
         working_dir = self.global_config["working_dir"]
+        self._file_name = os.path.join(working_dir, f"kv_store_{self.namespace}.json")
         self._storage_lock = get_storage_lock()
         self._data = get_namespace_data(self.namespace)
         with self._storage_lock:
             if not self._data:
-                self._file_name = os.path.join(working_dir, f"kv_store_{self.namespace}.json")
                 self._data: dict[str, Any] = load_json(self._file_name) or {}
-        logger.info(f"Load KV {self.namespace} with {len(self._data)} data")
+                logger.info(f"Load KV {self.namespace} with {len(self._data)} data")
 
 
     async def index_done_callback(self) -> None:
diff --git a/lightrag/kg/nano_vector_db_impl.py b/lightrag/kg/nano_vector_db_impl.py
index 07f8d367..d1682c7a 100644
--- a/lightrag/kg/nano_vector_db_impl.py
+++ b/lightrag/kg/nano_vector_db_impl.py
@@ -47,14 +47,14 @@ class NanoVectorDBStorage(BaseVectorStorage):
                 if self._client.value is None:
                     self._client.value = NanoVectorDB(
                         self.embedding_func.embedding_dim, storage_file=self._client_file_name
-                )
+                    )
+                    logger.info(f"Initialized vector DB client for namespace {self.namespace}")
             else:
                 if self._client is None:
                     self._client = NanoVectorDB(
                         self.embedding_func.embedding_dim, storage_file=self._client_file_name
                     )
-        
-        logger.info(f"Initialized vector DB client for namespace {self.namespace}")
+                    logger.info(f"Initialized vector DB client for namespace {self.namespace}")
 
     def _get_client(self):
         """Get the appropriate client instance based on multiprocess mode"""