[ https://issues.apache.org/jira/browse/HBASE-25015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nick Dimiduk updated HBASE-25015: --------------------------------- 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. -- This message was sent by Atlassian Jira (v8.3.4#803005)