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https://issues.apache.org/jira/browse/HADOOP-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Chansler updated HADOOP-2791:
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Component/s: dfs
> A tool to plot the locations of the blocks of a directory
> ---------------------------------------------------------
>
> Key: HADOOP-2791
> URL: https://issues.apache.org/jira/browse/HADOOP-2791
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Owen O'Malley
> Fix For: 0.17.0
>
>
> 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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