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https://issues.apache.org/jira/browse/HDFS-247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14065505#comment-14065505
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Allen Wittenauer commented on HDFS-247:
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It would be neat to be able to do this from OIV.
> A tool to plot the locations of the blocks of a directory
> ---------------------------------------------------------
>
> Key: HDFS-247
> URL: https://issues.apache.org/jira/browse/HDFS-247
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Owen O'Malley
> Labels: newbie
>
> It would be very useful to have a command that we could give a hdfs directory
> to, that would use fsck to find the block locations of the data files in that
> directory and group them by host and display the distribution graphically. We
> did this by hand and it was very for finding a skewed distribution that was
> causing performance problems. The tool should also be able to group by rack
> id and generate a similar plot.
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