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https://issues.apache.org/jira/browse/YARN-1003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13726095#comment-13726095
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Karthik Kambatla commented on YARN-1003:
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One of the most common questions we hear from people migrating to MR2 is how
they can restrict the number of tasks per node. While they can adjust the task
memory/cpu requirements for this, it is more involved compared to the MR1 model
where one can set the max maps/reduces per node.
> Add a maxContainersPerNode config to the Fair Scheduler
> -------------------------------------------------------
>
> Key: YARN-1003
> URL: https://issues.apache.org/jira/browse/YARN-1003
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 2.1.0-beta
> Reporter: Sandy Ryza
> Assignee: Karthik Kambatla
>
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