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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4399) Fix performance regression in shuffle
Date Thu, 05 Jul 2012 10:21:36 GMT
Luke Lu created MAPREDUCE-4399:
----------------------------------

             Summary: Fix performance regression in shuffle 
                 Key: MAPREDUCE-4399
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4399
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: tasktracker
    Affects Versions: 1.0.3, 0.20.203.0
            Reporter: Luke Lu
            Assignee: Luke Lu


There is a significant (up to 3x) performance regression in shuffle (vs 0.20.2) in the Hadoop
1.x series. Most noticeable with high-end switches.

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