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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-8468) Enable the use of queue based maximum container allocation limit and implement it in FairScheduler
Date Wed, 10 Oct 2018 04:15:01 GMT

     [ https://issues.apache.org/jira/browse/YARN-8468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Weiwei Yang resolved YARN-8468.
    Resolution: Fixed

> Enable the use of queue based maximum container allocation limit and implement it in
> --------------------------------------------------------------------------------------------------
>                 Key: YARN-8468
>                 URL: https://issues.apache.org/jira/browse/YARN-8468
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler, scheduler
>    Affects Versions: 3.1.0
>            Reporter: Antal Bálint Steinbach
>            Assignee: Antal Bálint Steinbach
>            Priority: Critical
>             Fix For: 3.2.0, 3.1.2
>         Attachments: YARN-8468-branch-3.1.018.patch, YARN-8468-branch-3.1.019.patch,
YARN-8468.000.patch, YARN-8468.001.patch, YARN-8468.002.patch, YARN-8468.003.patch, YARN-8468.004.patch,
YARN-8468.005.patch, YARN-8468.006.patch, YARN-8468.007.patch, YARN-8468.008.patch, YARN-8468.009.patch,
YARN-8468.010.patch, YARN-8468.011.patch, YARN-8468.012.patch, YARN-8468.013.patch, YARN-8468.014.patch,
YARN-8468.015.patch, YARN-8468.016.patch, YARN-8468.017.patch, YARN-8468.018.patch
> When using any scheduler, you can use "yarn.scheduler.maximum-allocation-mb" to limit
the overall size of a container. This applies globally to all containers and cannot be limited
by queue or and is not scheduler dependent.
> The goal of this ticket is to allow this value to be set on a per queue basis.
> The use case: User has two pools, one for ad hoc jobs and one for enterprise apps. User
wants to limit ad hoc jobs to small containers but allow enterprise apps to request as many
resources as needed. Setting yarn.scheduler.maximum-allocation-mb sets a default value for
maximum container size for all queues and setting maximum resources per queue with “maxContainerResources”
queue config value.
> Suggested solution:
> All the infrastructure is already in the code. We need to do the following:
>  * add the setting to the queue properties for all queue types (parent and leaf), this
will cover dynamically created queues.
>  * if we set it on the root we override the scheduler setting and we should not allow
>  * make sure that queue resource cap can not be larger than scheduler max resource cap
in the config.
>  * implement getMaximumResourceCapability(String queueName) in the FairScheduler
>  * implement getMaximumResourceCapability(String queueName) in both FSParentQueue and
FSLeafQueue as follows
>  * expose the setting in the queue information in the RM web UI.
>  * expose the setting in the metrics etc for the queue.
>  * Enforce the use of queue based maximum allocation limit if it is available, if not
use the general scheduler level setting
>  ** Use it during validation and normalization of requests in scheduler.allocate, app
submit and resource request

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