diff --git a/scenarios/preset/preset_grpc.py b/scenarios/preset/preset_grpc.py
index b28e6fc..37d58a2 100755
--- a/scenarios/preset/preset_grpc.py
+++ b/scenarios/preset/preset_grpc.py
@@ -33,7 +33,7 @@
 def main():
     container_list = []
     objects_struct = []
-    payload_filepath = '/tmp/data_file'
+    payload_filepath = '/tmp/data_file_' + args.size + 'k'
 
     endpoints = args.endpoint.split(',')