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Posted to mapreduce-issues@hadoop.apache.org by "Todd Lipcon (Commented) (JIRA)" <ji...@apache.org> on 2012/01/06 06:17:39 UTC

[jira] [Commented] (MAPREDUCE-3628) DFSIO read throughput is decreased by 16% in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181113#comment-13181113 ] 

Todd Lipcon commented on MAPREDUCE-3628:
----------------------------------------

Which test case are you using here? Is it TestDFSIO or something closer to a "teravalidate" type workload? Is the input dataset larger than RAM or are you disk-bound?
                
> DFSIO read throughput is decreased by 16% in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.
> -------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3628
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3628
>             Project: Hadoop Map/Reduce
>          Issue Type: Task
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Amol Kekre
>            Priority: Critical
>             Fix For: 0.23.1
>
>
> DFSIO read throughput is decreased by 16% in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.

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