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https://issues.apache.org/jira/browse/HDFS-1128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12868355#action_12868355
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Konstantin Shvachko commented on HDFS-1128:
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{{WriteMapper.doIO()}} still creates only one file per map. I probably missed
something.
Also in your patch "Average IO rate" and "std deviation" are printed twice.
> Allow TestDFSIO to process multiple files for each map
> ------------------------------------------------------
>
> Key: HDFS-1128
> URL: https://issues.apache.org/jira/browse/HDFS-1128
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Hong Tang
> Attachments: HDFS-1128-yhadoop-20.1xx-2.patch,
> HDFS-1128-yhadoop-20.1xx.patch
>
>
> DFSIO only processes one file in each map, it would be nice to enhance it to
> process multiple files.
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