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https://issues.apache.org/jira/browse/MAPREDUCE-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12753503#action_12753503
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dhruba borthakur commented on MAPREDUCE-944:
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This is not really a bug fix. It is mostly a refactoring of the code so that a
certain functionality is separated out more cleanly. HADOOP-961 will benefit
from this JIRA and it will have quite a few unit tests associated with it.
> Extend FairShare scheduler to fair-share memory usage in the cluster
> --------------------------------------------------------------------
>
> Key: MAPREDUCE-944
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-944
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/fair-share
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.21.0
>
> Attachments: LoadManager.txt, LoadManager2.txt
>
>
> The FairShare Scheduler has an extensible LoadManager API to regulate
> allocating new tasks on a particular TaskTracker. In similar lines, it would
> be nice if the FairShare Scheduler can have a pluggable policy to regulate
> new tasks from a particular job. This will allow one to skip scheduling tasks
> of a job that is eating a large percentage of memory in the cluster, i.e.
> fair-share of memory resources among jobs.
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