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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1338) Improve TestDFSIO
Date Fri, 13 Aug 2010 17:41:17 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898331#action_12898331
] 

Rajesh Balamohan commented on HDFS-1338:
----------------------------------------

I am on vacation from 13-Aug - 15-Aug. I do not have internet access during this time.  Please
check with my manager sriguru@ for any urgent issues.

~Rajesh.B



> Improve TestDFSIO
> -----------------
>
>                 Key: HDFS-1338
>                 URL: https://issues.apache.org/jira/browse/HDFS-1338
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: test
>            Reporter: Arun C Murthy
>         Attachments: TestDFSIOparser_y0.20.patch
>
>
> Currently the read test in TestDFSIO benchmark just opens a large side file and measures
the read performance. The MR scheduler has no opportunity to do *any* optimization for the
TestDFSIO MR application. The side-effect of this is that it is *very* hard to do any meaningful
analysis of the results of the benchmark i.e. to check if node-local or rack-local or off-switch
read performance improved/degraded.

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