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Hari Sekhon updated HBASE-21006: -------------------------------- Summary: Balancer - data locality drops 30-40% after rolling restarts on cluster, not migrating regions back to original regionservers (was: Balancer - data locality drops hugely after rolling restarts on cluster, not factoring in data locality enough?) > Balancer - data locality drops 30-40% after rolling restarts on cluster, not > migrating regions back to original regionservers > ----------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-21006 > URL: https://issues.apache.org/jira/browse/HBASE-21006 > Project: HBase > Issue Type: Improvement > Components: Balancer > Affects Versions: 1.1.2 > Environment: HDP 2.6 > Reporter: Hari Sekhon > Priority: Major > > After doing rolling restarts of my HBase cluster the data locality drops by > 30-40% every time which implies the stochastic balancer is not optimizing for > data locality enough, at least not under the circumstance of rolling restarts. > The stochastic balancer is supposed to take data locality in to account but > if this is the case, surely it should move regions back to their original > RegionServer and data locality should return back to around where it was, not > drop by 30-40% percent every time I need to do some tuning and a rolling > restarts. -- This message was sent by Atlassian JIRA (v7.6.3#76005)