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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2791) A tool to plot the locations of the blocks of a directory
Date Wed, 20 Feb 2008 01:30:47 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-2791:
------------------------------------

    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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