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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5467) Create an offline fsimage image viewer
Date Wed, 25 Mar 2009 00:31:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HADOOP-5467:
-------------------------------------------

    Component/s:     (was: util)
                 dfs

Nice tool!

> Not sure why the patch failed to apply.
Try "svn update".

Some comments:
- This tool should be under org.apache.hadoop.hdfs.tools package since it is a hdfs image
viewer.
- For the same reason, the command should go to bin/hdfs, but not bin/hadoop.

> Create an offline fsimage image viewer
> --------------------------------------
>
>                 Key: HADOOP-5467
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5467
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: fsimage.xml, HADOOP-5467.patch, HADOOP-5467.patch, HADOOP-5467.patch
>
>
> It would be useful to have a tool to examine/dump the contents of the fsimage file to
human-readable form.  This would allow analysis of the namespace (file usage, block sizes,
etc) without impacting the operation of the namenode.  XML would be reasonable output format,
as it can be easily viewed, compressed and manipulated via either XSLT or XQuery.  
> I've started work on this and will have an initial version soon.

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