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https://issues.apache.org/jira/browse/MAPREDUCE-2638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067291#comment-13067291
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Tom White commented on MAPREDUCE-2638:
--------------------------------------

Thanks Matei. The preemption intervals are indeed very low - they are set like 
this in order to trigger preemption in a pseudo-distributed cluster and so 
stress the scheduler. For larger clusters the settings you suggest are entirely 
appropriate, as well as increasing the sleep time in the jobs by setting 
{{test.fairscheduler.sleepTime}} to a higher value.

> Create a simple stress test for the fair scheduler
> --------------------------------------------------
>
>                 Key: MAPREDUCE-2638
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2638
>             Project: Hadoop Map/Reduce
>          Issue Type: Test
>          Components: contrib/fair-share
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-2638.patch, MAPREDUCE-2638.patch
>
>
> This would be a test that runs against a cluster, typically with settings 
> that allow preemption to be exercised.

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