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Posted to issues@ambari.apache.org by "Hari Sekhon (JIRA)" <ji...@apache.org> on 2018/07/23 11:18:00 UTC

[jira] [Created] (AMBARI-24334) HBase Balancer - temporarily disable balancer for HBase rolling restart

Hari Sekhon created AMBARI-24334:
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             Summary: HBase Balancer - temporarily disable balancer for HBase rolling restart
                 Key: AMBARI-24334
                 URL: https://issues.apache.org/jira/browse/AMBARI-24334
             Project: Ambari
          Issue Type: Improvement
          Components: ambari-server, rolling-upgrade
    Affects Versions: 2.5.2
            Reporter: Hari Sekhon


Temporarily disable HBase Balancer when doing HBase rolling restarts.

I've noticed a drop in data locality after doing an HBase rolling restart looking at the Ambari Grafana graph found on the HBase Regionservers dashboard -> Locality (row at bottom) -> Percent Files Local graph.

I believe the HBase balancer should be temporarily disabled (if enabled) and then re-enabled after all RegionServers have successfully completed. One must be careful to only re-enable the balancer if it was enabled before the rolling restart was initiated.



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