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Posted to mapreduce-dev@hadoop.apache.org by "Scott Chen (JIRA)" <ji...@apache.org> on 2009/11/09 22:51:33 UTC

[jira] Created: (MAPREDUCE-1198) Alternatively schedule different types of tasks in fair share scheduler

Alternatively schedule different types of tasks in fair share scheduler
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                 Key: MAPREDUCE-1198
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1198
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: contrib/fair-share
            Reporter: Scott Chen
            Assignee: Scott Chen


Matei has mentioned in MAPREDUCE-961 that the current scheduler will first try to launch map tasks until canLaunthTask() returns false then look for reduce tasks. This might starve reduce task. He also mention that alternatively schedule different types of tasks can solve this problem.

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