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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-1800) Extend image checksumming to function with multiple fsimage files
Date Fri, 13 May 2011 03:34:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon resolved HDFS-1800.
-------------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]

I went ahead and committed this updated patch to the branch. If you have any further followup
feel free to comment here and we'll address it post-commit.

> Extend image checksumming to function with multiple fsimage files
> -----------------------------------------------------------------
>
>                 Key: HDFS-1800
>                 URL: https://issues.apache.org/jira/browse/HDFS-1800
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Edit log branch (HDFS-1073)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: Edit log branch (HDFS-1073)
>
>         Attachments: hdfs-1800-prelim.txt, hdfs-1800.txt, hdfs-1800.txt, hdfs-1800.txt
>
>
> HDFS-903 added the MD5 checksum of the fsimage to the VERSION file in each image directory.
This allows it to verify that the FSImage didn't get corrupted or accidentally replaced on
disk.
> With HDFS-1073, there may be multiple fsimage_N files in a storage directory corresponding
to different checkpoints. So having a single MD5 in the VERSION file won't suffice. Instead
we need to store an MD5 per image file.

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