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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1338) Improve TestDFSIO
Date Fri, 13 Aug 2010 17:27:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HDFS-1338:
-----------------------------------------

    Attachment: TestDFSIOparser_y0.20.patch

TestDFSIOparser_y0.20.patch: a small program to parse TestDFSIO output.

> Improve TestDFSIO
> -----------------
>
>                 Key: HDFS-1338
>                 URL: https://issues.apache.org/jira/browse/HDFS-1338
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            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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