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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/01/21 06:23:34 UTC

[jira] [Commented] (HBASE-12891) have hbck do region consistency checks in parallel

    [ https://issues.apache.org/jira/browse/HBASE-12891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14285185#comment-14285185 ] 

Ted Yu commented on HBASE-12891:
--------------------------------

If there're many regions to check, there would be considerable load on master, right ?
Should there be some limit on the number of concurrent threads ?

> have hbck do region consistency checks in parallel
> --------------------------------------------------
>
>                 Key: HBASE-12891
>                 URL: https://issues.apache.org/jira/browse/HBASE-12891
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0, 0.98.10, 1.1.0
>            Reporter: churro morales
>            Assignee: churro morales
>         Attachments: HBASE-12891.98.patch, HBASE-12891.patch
>
>
> We have a lot of regions on our cluster ~500k and noticed that hbck took quite some time in checkAndFixConsistency().  [~davelatham] patched our cluster to do this check in parallel to speed things up.  I'll attach the patch.



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