ah ! Can you try to run the below HDFS balancer command , The below command would move the blocks at a decent pace and would not affect the existing jobs nohup hdfs balancer -Ddfs.balancer.moverThreads=5000 -Ddfs.datanode.balance.max.concurrent.moves=20 -Ddfs.datanode.balance.bandwidthPerSec=10737418240 -Ddfs.balancer.dispatcherThreads=200 -Ddfs.balancer.max-size-to-move=100737418240 -threshold 10 1>/home/hdfs/balancer/balancer-out_$(date +"%Y%m%d%H%M%S").log 2>/home/hdfs/balancer/balancer-err_$(date +"%Y%m%d%H%M%S").log   you can also refer to the below doc if you need any tuning https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.5/data-storage/content/balancer_commands.html ... View more