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https://issues.apache.org/jira/browse/YARN-3920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14647045#comment-14647045
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Arun Suresh commented on YARN-3920:
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Thanks for the patch [~adhoot],
The patch looks pretty straight forward to me and the test case looks good.
My only minor comment is, Maybe we can expose this as an absolute value, rather
than a ratio and the {{isReservable()}} function will just take
min(ReservationThreshold, MaxCapability). I am ok either way though
+1 pending above decision
> FairScheduler Reserving a node for a container should be configurable to
> allow it used only for large containers
> ----------------------------------------------------------------------------------------------------------------
>
> Key: YARN-3920
> URL: https://issues.apache.org/jira/browse/YARN-3920
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: Anubhav Dhoot
> Assignee: Anubhav Dhoot
> Attachments: yARN-3920.001.patch
>
>
> Reserving a node for a container was designed for preventing large containers
> from starvation from small requests that keep getting into a node. Today we
> let this be used even for a small container request. This has a huge impact
> on scheduling since we block other scheduling requests until that reservation
> is fulfilled. We should make this configurable so its impact can be minimized
> by limiting it for large container requests as originally intended.
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