diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index 88e1479f42..a826a58d1d 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -29,7 +29,7 @@ etcd:
 # Related configuration of minio, which is responsible for data persistence for Milvus.
 minio:
   address: localhost
-  port: 9000
+  port: 9000   # Port of MinIO/S3
   accessKeyID: minioadmin
   secretAccessKey: minioadmin
   useSSL: false