diff --git a/ucm/store/pcstore/pcstore_connector.py b/ucm/store/pcstore/pcstore_connector.py
index 00dffa85..7217620e 100644
--- a/ucm/store/pcstore/pcstore_connector.py
+++ b/ucm/store/pcstore/pcstore_connector.py
@@ -53,7 +53,7 @@ def __init__(self, config: Dict):
             param.transferIoDirect = config.get("use_direct", False)
             param.transferStreamNumber = config.get("stream_number", 8)
             param.transferBufferNumber = config.get("buffer_number", 4096)
-            param.transferLocalRankSize = config.get("local_rank_size", 8)
+            param.transferLocalRankSize = config.get("local_rank_size", 1)
             param.transferScatterGatherEnable = config.get("use_scatter_gatter", False)
         ret = self.store.Setup(param)
         if ret != 0:
diff --git a/ucm/store/pcstore/pcstore_connector_v1.py b/ucm/store/pcstore/pcstore_connector_v1.py
index 3cf964fe..39f0589f 100644
--- a/ucm/store/pcstore/pcstore_connector_v1.py
+++ b/ucm/store/pcstore/pcstore_connector_v1.py
@@ -54,7 +54,7 @@ def __init__(self, config: Dict):
             param.transferIoDirect = config.get("use_direct", False)
             param.transferStreamNumber = config.get("stream_number", 8)
             param.transferBufferNumber = config.get("buffer_number", 4096)
-            param.transferLocalRankSize = config.get("local_rank_size", 8)
+            param.transferLocalRankSize = config.get("local_rank_size", 1)
             param.transferScatterGatherEnable = config.get("use_scatter_gatter", False)
         ret = self.store.Setup(param)
         if ret != 0: