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https://issues.apache.org/jira/browse/HBASE-3610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007881#comment-13007881
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Hudson commented on HBASE-3610:
-------------------------------
Integrated in HBase-TRUNK #1792 (See
[https://hudson.apache.org/hudson/job/HBase-TRUNK/1792/])
> Improve RegionSplitter Performance
> ----------------------------------
>
> Key: HBASE-3610
> URL: https://issues.apache.org/jira/browse/HBASE-3610
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Trivial
> Fix For: 0.90.2, 0.92.0
>
> Attachments: 0001-HBASE-3610-Improve-RegionSplitter-performance.patch
>
>
> When running RegionSplitter on a 100-node cluster with 900 regions (and
> plenty of data), the utility took around 72 hours to run. Analysis revealed
> two major bottlenecks:
> 1. We are serialized on the logical split (i.e. waiting for the split request
> to be registered). Parallelizing this step will align configured and actual
> outstanding splits.
> 2. Outstanding splits are modeled like a queue. Changing this to a list with
> a scanner will allow handling splits that finish out of order.
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