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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1485) CapacityScheduler should have prevent a single job taking over large parts of a cluster
Date Thu, 11 Feb 2010 19:52:27 GMT
CapacityScheduler should have prevent a single job taking over large parts of a cluster
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                 Key: MAPREDUCE-1485
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1485
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: contrib/capacity-sched
            Reporter: Arun C Murthy
            Assignee: Arun C Murthy
             Fix For: 0.22.0


The proposal is to have a per-queue limit on the number of concurrent tasks a job can run
on a cluster. 

We've seen cases where a single, large, job took over a majority of the cluster - worse, it
meant that any bug in it caused issues for both the NameNode _and_ the JobTracker.

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