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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-2155) RaidNode should optionally dispatch map reduce jobs to fix corrupt blocks (instead of fixing locally)
Date Tue, 30 Nov 2010 06:27:11 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated MAPREDUCE-2155:
----------------------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]
          Status: Resolved  (was: Patch Available)

I just committed this. Thanks Patrick!

> RaidNode should optionally dispatch map reduce jobs to fix corrupt blocks (instead of
fixing locally)
> -----------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2155
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2155
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/raid
>    Affects Versions: 0.23.0
>            Reporter: Patrick Kling
>            Assignee: Patrick Kling
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-2155.2.patch, MAPREDUCE-2155.patch
>
>
> Recomputing blocks based on parity information is expensive. Rather than doing this locally
at the RaidNode, we should run map reduce jobs. This will allow us to quickly fix a large
number of corrupt or missing blocks.

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