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https://issues.apache.org/jira/browse/HDFS-12253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dennis Huo resolved HDFS-12253.
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Resolution: Fixed
> CLONE - Pretty-format the output for DFSIO
> ------------------------------------------
>
> Key: HDFS-12253
> URL: https://issues.apache.org/jira/browse/HDFS-12253
> Project: Hadoop HDFS
> Issue Type: Test
> Reporter: Dennis Huo
> Assignee: Kai Zheng
> Fix For: 3.0.0-alpha1, 2.8.0
>
>
> Ref. the following DFSIO output, I was surprised the test throughput was only
> {{17}} MB/s, which doesn't make sense for a real cluster. Maybe it's used for
> other purpose? For users, it may make more sense to give the throughput 1610
> MB/s (1228800/763), calculated by *Total MBytes processed / Test exec time*.
> {noformat}
> 15/09/28 11:42:23 INFO fs.TestDFSIO: ----- TestDFSIO ----- : write
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Date & time: Mon Sep 28
> 11:42:23 CST 2015
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Number of files: 100
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Total MBytes processed: 1228800.0
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Throughput mb/sec:
> 17.457387239456878
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Average IO rate mb/sec: 17.57563018798828
> 15/09/28 11:42:23 INFO fs.TestDFSIO: IO rate std deviation:
> 1.7076328985378455
> 15/09/28 11:42:23 INFO fs.TestDFSIO: Test exec time sec: 762.697
> 15/09/28 11:42:23 INFO fs.TestDFSIO:
> {noformat}
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