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Josh Elser commented on HBASE-21006: ------------------------------------ [~harisekhon], are you planning to do analysis of your issue? It seems like you're just dumping a report here which helps no one. HBASE-18036 is pretty much what you're already describing, so I'm apt to close this as invalid unless you have more information to share about your specific situation. > Balancer - data locality drops 30-40% across all nodes after every > cluster-wide rolling restart, 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, and that it must not be balancing the regions back to their > original RegionServers. > 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 > RegionServers 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 > restart. -- This message was sent by Atlassian JIRA (v7.6.3#76005)