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https://issues.apache.org/jira/browse/HBASE-25015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Dimiduk updated HBASE-25015:
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Description: I'm attempting to apply a load to a small distributed cluster
(12 RS). I use {{-presplit}} and specify 3 regions per region server.
{{randomWrite}} test with {{-nomapred}} and 30 client threads. The result is
severe hot-spotting on a single region region (10's of thousands of reqs/sec)
and minimal load (high 10's to low 100's reqs/sec) to the others. It seems the
split algorithm and the load generator do not agree on an even data
distribution. (was: I'm attempting to apply a load to a small distributed
cluster (12 RS). I use {{--presplit}} and specify 3 regions per region server.
{{randomWrite}} test with {{--nomapred}} and 30 client threads. The result is
severe hot-spotting on a single region region (10's of thousands of reqs/sec)
and minimal load (high 10's to low 100's reqs/sec) to the others. It seems the
split algorithm and the load generator do not agree on an even data
distribution.)
> PerformanceEvaluation with presplit randomWrite test has severe hotspotting
> ---------------------------------------------------------------------------
>
> Key: HBASE-25015
> URL: https://issues.apache.org/jira/browse/HBASE-25015
> Project: HBase
> Issue Type: Bug
> Components: test
> Affects Versions: 2.3.1
> Reporter: Nick Dimiduk
> Priority: Major
>
> I'm attempting to apply a load to a small distributed cluster (12 RS). I use
> {{-presplit}} and specify 3 regions per region server. {{randomWrite}} test
> with {{-nomapred}} and 30 client threads. The result is severe hot-spotting
> on a single region region (10's of thousands of reqs/sec) and minimal load
> (high 10's to low 100's reqs/sec) to the others. It seems the split algorithm
> and the load generator do not agree on an even data distribution.
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