Improve TestDFSIO
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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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