diff --git a/Hadoop-Compatible-File-System.md b/Hadoop-Compatible-File-System.md
index 3916efc..b7e1e96 100644
--- a/Hadoop-Compatible-File-System.md
+++ b/Hadoop-Compatible-File-System.md
@@ -88,6 +88,10 @@ Both reads and writes are working fine.
        <name>fs.AbstractFileSystem.seaweedfs.impl</name>
        <value>seaweed.hdfs.SeaweedAbstractFileSystem</value>
     </property>
+    <property>
+       <name>io.file.buffer.size</name>
+       <value>4194304</value>
+    </property>
 </configuration>
 ```
 * Deploy the SeaweedFS HDFS client jar