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From "Jean-Marc Spaggiari (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8803) region_mover.rb should move multiple regions at a time
Date Thu, 11 Jul 2013 01:41:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705377#comment-13705377
] 

Jean-Marc Spaggiari commented on HBASE-8803:
--------------------------------------------

I tried with the " added.

Rolling Restart script without --maxthreads param:
real    71m12.348s
user    2m44.578s
sys     0m9.301s

Rolling Restart script with --maxthreads 10:
real    48m18.191s
user    3m3.479s
sys     0m11.925s

Rolling Restart script with --maxthreads 30:
real    39m58.674s
user    2m47.802s
sys     0m9.805s


Please note that one of ny RS died 2 days ago so I'm down to 7. But with more than 10RS, I
really think --maxthreads 30 should show better improvements.

Conclusion, it's all working fine.
                
> region_mover.rb should move multiple regions at a time
> ------------------------------------------------------
>
>                 Key: HBASE-8803
>                 URL: https://issues.apache.org/jira/browse/HBASE-8803
>             Project: HBase
>          Issue Type: Bug
>          Components: Usability
>    Affects Versions: 0.98.0, 0.94.8, 0.95.1
>            Reporter: Jean-Marc Spaggiari
>            Assignee: Jean-Marc Spaggiari
>             Fix For: 0.98.0, 0.95.2, 0.94.10
>
>         Attachments: HBASE-8803-v0-trunk.patch, HBASE-8803-v1-0.94.patch, HBASE-8803-v1-trunk.patch,
HBASE-8803-v2-0.94.patch
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> When there is many regions in a cluster, rolling_restart can take hours because region_mover
is moving the regions one by one.

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