diff --git a/Hadoop-Compatible-File-System.md b/Hadoop-Compatible-File-System.md
index c8962c5..682062b 100644
--- a/Hadoop-Compatible-File-System.md
+++ b/Hadoop-Compatible-File-System.md
@@ -50,6 +50,9 @@ You would need to start a weed filer first, build the seaweedfs-hadoop2-client-x
 or seaweedfs-hadoop3-client-xxx.jar, and do the following:
 
 ```
+# optionally adjust hadoop memory allocation
+$ export HADOOP_CLIENT_OPTS="-Xmx4g"
+
 $ cd ${HADOOP_HOME}
 # create etc/hadoop/mapred-site.xml, just to satisfy hdfs dfs. skip this if the file already exists.
 $ echo "<configuration></configuration>" > etc/hadoop/mapred-site.xml
@@ -111,8 +114,6 @@ $ cp ./seaweedfs-hadoop3-client-x.x.x.jar share/hadoop/common/lib/
 Now you can do this:
 ```
 $ cd ${HADOOP_HOME}
-// optionally adjust hadoop memory allocation
-$ export HADOOP_CLIENT_OPTS="-Xmx4g"
 $ bin/hdfs dfs -ls /
 
 # if you did not set fs.defaultFS in etc/hadoop/core-site.xml