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HDP HDFS balancer CLI not found

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Contributor

We had an HDP 2.5.3.0 cluster that had an HDFS balancer CLI command that is not found with HDP 3.1.5.0.  I am adding new nodes the the 3.1.5 cluster and it appears there is some HDFS balancing going on, albeit slowly.  Did the CLI go away with 3.1.5.0 or am I missing something?

1 ACCEPTED SOLUTION

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Contributor

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

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3 REPLIES 3

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Contributor

Hello @wazzu62 , Kindly share what is the error message that you get while you run the hdfs balancer command as we haven't removed the CLI command on HDP 3.1.5.0. 

 

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Contributor

Operator error, I forgot the balancer was an hdfs command and not something in /usr/bin

avatar
Contributor

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