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Date: Mon, 21 Aug 2017 23:41:00 +0000 (UTC)
From: "Wangda Tan (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12721318.1402858766000.84575.1503358860711@Atlassian.JIRA>
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References: <JIRA.12721318.1402858766000@Atlassian.JIRA> <JIRA.12721318.1402858766413@jira-lw-us.apache.org>
Subject: [jira] [Commented] (YARN-2162) add ability in Fair Scheduler to
 optionally configure maxResources in terms of percentage
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archived-at: Mon, 21 Aug 2017 23:41:05 -0000


    [ https://issues.apache.org/jira/browse/YARN-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136023#comment-16136023 ] 

Wangda Tan commented on YARN-2162:
----------------------------------

Just curious to ask since we're working on YARN-5881. What is your plan to handle queues in the cluster which have mixed configuration of absolute value and percentage. Our plan is to not support this for now (see design of YARN-5881). Not sure what is your plan.

cc: [~sunilg]

> add ability in Fair Scheduler to optionally configure maxResources in terms of percentage
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-2162
>                 URL: https://issues.apache.org/jira/browse/YARN-2162
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler, scheduler
>            Reporter: Ashwin Shankar
>            Assignee: Yufei Gu
>              Labels: scheduler
>         Attachments: YARN-2162.001.patch, YARN-2162.002.patch
>
>
> minResources and maxResources in fair scheduler configs are expressed in terms of absolute numbers X mb, Y vcores. 
> As a result, when we expand or shrink our hadoop cluster, we need to recalculate and change minResources/maxResources accordingly, which is pretty inconvenient.
> We can circumvent this problem if we can optionally configure these properties in terms of percentage of cluster capacity. 


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