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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1338) Improve TestDFSIO
Date Tue, 10 Aug 2010 16:41:16 GMT
Improve TestDFSIO

                 Key: HDFS-1338
                 URL: https://issues.apache.org/jira/browse/HDFS-1338
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Arun C Murthy

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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