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From "Ahmed Radwan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-2787) MR-279: Performance improvement in running Uber MapTasks
Date Mon, 08 Aug 2011 19:22:27 GMT
MR-279: Performance improvement in running Uber MapTasks
--------------------------------------------------------

                 Key: MAPREDUCE-2787
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2787
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: mrv2
            Reporter: Ahmed Radwan
            Assignee: Ahmed Radwan


The runUberMapTasks() in org.apache.hadoop.mapred.UberTask obtains the local fileSystem and
local job configuration for every task attempt.  This will have a negative performance impact.

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