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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2015/08/31 17:02:46 UTC

[jira] [Resolved] (HBASE-6613) Automatically merge empty regions

     [ https://issues.apache.org/jira/browse/HBASE-6613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack resolved HBASE-6613.
--------------------------
    Resolution: Duplicate

Resolving in favor of the work over in HBASE-13103

> Automatically merge empty regions
> ---------------------------------
>
>                 Key: HBASE-6613
>                 URL: https://issues.apache.org/jira/browse/HBASE-6613
>             Project: HBase
>          Issue Type: New Feature
>          Components: master, regionserver, util
>    Affects Versions: 0.94.1
>            Reporter: Ionut Ignatescu
>
> Consider an usecase where row keys has an increasing value(time-series data for example) and data retention is set to a concrete value(60 days for example).
> After a period of time, longer than retention, empty regions will appear. This will cause high memory use on region servers.
> In my opinion, regions merge could be part of major compaction or another tool should be provided. From my understading, it is possible to merge 2 empty regions without make table offline, but it's not possible to merge one empty region with a non-empty region without close/unassing this regions.



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