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https://issues.apache.org/jira/browse/SPARK-19782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890011#comment-15890011
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Sean Owen commented on SPARK-19782:
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I'm not clear what this means? Spark apps are configured to request a certain
amount of resource from the resource manager. They can already tailor their
usage with dynamic allocation. The resource manager is the thing in charge of
how much resource exists and how much to give to an app.
> Spark query available cores from application
> --------------------------------------------
>
> Key: SPARK-19782
> URL: https://issues.apache.org/jira/browse/SPARK-19782
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 2.1.0
> Reporter: Tom Lewis
>
> It might be helpful for Spark jobs to self regulate resources if they could
> query how many cores exist on a executing system not just how many are being
> used at a given time.
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