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