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Posted to yarn-issues@hadoop.apache.org by "Anubhav Dhoot (JIRA)" <ji...@apache.org> on 2015/09/01 19:30:46 UTC

[jira] [Commented] (YARN-3920) FairScheduler Reserving a node for a container should be configurable to allow it used only for large containers

    [ https://issues.apache.org/jira/browse/YARN-3920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725729#comment-14725729 ] 

Anubhav Dhoot commented on YARN-3920:
-------------------------------------

[~asuresh] appreciate your review.

> 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-3920.004.patch, YARN-3920.004.patch, YARN-3920.004.patch, YARN-3920.004.patch, YARN-3920.005.patch, yARN-3920.001.patch, yARN-3920.002.patch, yARN-3920.003.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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