11.1. How to rebalance HDFS

This topic describes how you can initiate an HDFS rebalance from Ambari.

. In Ambari Web, browse to Services > HDFS > Summary.
Select Service Actions, then choose Rebalance HDFS.
Enter the Balance Threshold value as a percentage of disk capacity.
Click Start to begin the rebalance.
You can check rebalance progress or cancel a rebalance in process by opening the Background Operations dialog.