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From "Anubhav Dhoot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3920) FairScheduler Reserving a node for a container should be configurable to allow it used only for large containers
Date Thu, 27 Aug 2015 05:10:46 GMT

     [ https://issues.apache.org/jira/browse/YARN-3920?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anubhav Dhoot updated YARN-3920:
--------------------------------
    Attachment: YARN-3920.004.patch

Updated configuration in FairSchedulerConfiguration

> 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-3920.001.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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