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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (YARN-7424) Capacity Scheduler Intra-queue preemption: add property to only preempt up to configured MULP
Date Tue, 31 Oct 2017 20:53:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-7424?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Payne reassigned YARN-7424:
--------------------------------

    Assignee: Eric Payne

> Capacity Scheduler Intra-queue preemption: add property to only preempt up to configured
MULP
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-7424
>                 URL: https://issues.apache.org/jira/browse/YARN-7424
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacity scheduler, scheduler preemption
>    Affects Versions: 3.0.0-beta1, 2.8.2
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>
> If the queue's configured minimum user limit percent (MULP) is something small like 1%,
all users will max out well over their MULP until 100 users have apps in the queue. Since
the intra-queue preemption monitor tries to balance the resource among the users, most of
the time in this use case it will be preempting containers on behalf of users that are already
over their MULP guarantee.
> This JIRA proposes that a property should be provided so that a queue can be configured
to only preempt on behalf of a user until that user has reached its MULP.



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