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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5519) Remove claims from mapred-default.xml that prime numbers of tasks are helpful.
Date Tue, 17 Mar 2009 21:03:50 GMT
Remove claims from mapred-default.xml that prime numbers of tasks are helpful.
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                 Key: HADOOP-5519
                 URL: https://issues.apache.org/jira/browse/HADOOP-5519
             Project: Hadoop Core
          Issue Type: Improvement
          Components: mapred
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley
             Fix For: 0.20.0


There is no value in using prime numbers for numbers of tasks. In fact, most jobs don't even
need the number of maps set, since it will increase to the number of blocks.

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