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From "Ramkumar Vadali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-2320) RAID DistBlockFixer should limit pending jobs instead of pending files
Date Fri, 11 Feb 2011 17:57:59 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ramkumar Vadali updated MAPREDUCE-2320:
---------------------------------------

          Component/s: contrib/raid
    Affects Version/s: 0.20.3
                       0.20.2
           Issue Type: Improvement  (was: Bug)

> RAID DistBlockFixer should limit pending jobs instead of pending files
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2320
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2320
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/raid
>    Affects Versions: 0.20.2, 0.20.3
>            Reporter: Ramkumar Vadali
>            Assignee: Ramkumar Vadali
>            Priority: Minor
>
> DistBlockFixer limits the number of files being fixed simultaneously to avoid an unlimited
backlog. This limits the number of parallel jobs though, and if one job has a long running
task, it prevents newer jobs being started. Instead, it should have a limit on running jobs.
That way, one long running task will not block other jobs.

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