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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (JIRA)" <ji...@apache.org> on 2011/03/08 01:45:07 UTC
[jira] Updated: (HBASE-3610) Improve RegionSplitter Performance
[ https://issues.apache.org/jira/browse/HBASE-3610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nicolas Spiegelberg updated HBASE-3610:
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Status: Patch Available (was: Open)
> 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
> 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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