hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2176) CapacityScheduler loops over all running applications rather than actively requesting apps
Date Mon, 27 Apr 2015 18:11:39 GMT

    [ https://issues.apache.org/jira/browse/YARN-2176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14514581#comment-14514581
] 

Jason Lowe commented on YARN-2176:
----------------------------------

Yes, it appears most of the benefit should be there.  It's still iterating over those applications
but avoids most of the body of the loop when doing so.

There's still the matter of the FairScheduler needing a similar optimization, and we should
either address that in this JIRA or YARN-3547.

> CapacityScheduler loops over all running applications rather than actively requesting
apps
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-2176
>                 URL: https://issues.apache.org/jira/browse/YARN-2176
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>    Affects Versions: 2.4.0
>            Reporter: Jason Lowe
>
> The capacity scheduler performance is primarily dominated by LeafQueue.assignContainers,
and that currently loops over all applications that are running in the queue.  It would be
more efficient if we looped over just the applications that are actively asking for resources
rather than all applications, as there could be thousands of applications running but only
a few hundred that are currently asking for resources.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message