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From "Ian Varley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5401) PerformanceEvaluation generates 10x the number of expected mappers
Date Fri, 31 Aug 2012 18:23:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13446199#comment-13446199

Ian Varley commented on HBASE-5401:

Hey Oliver, I see in your blog post (http://gbif.blogspot.com/2012/02/performance-evaluation-of-hbase.html)
that you patched this issue. Mind posting that patch back here?

> PerformanceEvaluation generates 10x the number of expected mappers
> ------------------------------------------------------------------
>                 Key: HBASE-5401
>                 URL: https://issues.apache.org/jira/browse/HBASE-5401
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>            Reporter: Oliver Meyn
> With a command line like 'hbase org.apache.hadoop.hbase.PerformanceEvaluation randomWrite
10' there are 100 mappers spawned, rather than the expected 10.  The culprit appears to be
the outer loop in writeInputFile which sets up 10 splits for every "asked-for client".  I
think the fix is just to remove that outer loop.

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