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Date: Fri, 10 Feb 2017 05:28:41 +0000 (UTC)
From: "Karthik Kambatla (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13041452.1486580325000.45599.1486704521615@Atlassian.JIRA>
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Subject: [jira] [Commented] (YARN-6163) FS Preemption is a trickle for
 severely starved applications
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archived-at: Fri, 10 Feb 2017 05:28:52 -0000


    [ https://issues.apache.org/jira/browse/YARN-6163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860750#comment-15860750 ] 

Karthik Kambatla commented on YARN-6163:
----------------------------------------

Patch that considers multiple RRs for an app. Tracking individual containers was too complicated for little gain. 

> FS Preemption is a trickle for severely starved applications
> ------------------------------------------------------------
>
>                 Key: YARN-6163
>                 URL: https://issues.apache.org/jira/browse/YARN-6163
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: fairscheduler
>    Affects Versions: 2.9.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: yarn-6163-1.patch
>
>
> With current logic, only one RR is considered per each instance of marking an application starved. This marking happens only on the update call that runs every 500ms.  Due to this, an application that is severely starved takes forever to reach fairshare based on preemptions.


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