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https://issues.apache.org/jira/browse/MAPREDUCE-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752720#action_12752720
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Scott Chen commented on MAPREDUCE-944:
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I wonder where why there are test errors. canLaunchTask only returns true so it
shouldn't change anything. I have applied this patch and run ant clean test. It
shows no test error.
> 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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