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https://issues.apache.org/jira/browse/HBASE-8803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730132#comment-13730132
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Jean-Marc Spaggiari commented on HBASE-8803:
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[~stack] I tried this script many times. I already deployed it on my own
cluster, and used it to test 0.94.10. I will use it too for 0.94.11 which is
coming. Always worked well for me.
[~lhofhansl] that's also an option. For the "unload" part, we only do a thread
per RS, so it's not really required, and so I just used the same for the load
part. I don't think it's going to really reduce the move time.
> 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
> Priority: Critical
> Fix For: 0.98.0, 0.95.2, 0.94.12
>
> Attachments: HBASE-8803-v0-trunk.patch, HBASE-8803-v1-0.94.patch,
> HBASE-8803-v1-trunk.patch, HBASE-8803-v2-0.94.patch,
> HBASE-8803-v2-0.94.patch, HBASE-8803-v3-0.94.patch, HBASE-8803-v4-0.94.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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