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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5892) Capacity Scheduler: Support user-specific minimum user limit percent
Date Thu, 02 Mar 2017 06:54:45 GMT

    [ https://issues.apache.org/jira/browse/YARN-5892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15891712#comment-15891712
] 

Wangda Tan commented on YARN-5892:
----------------------------------

bq. In my mind, overriding queue's MULP with user-specific MULP is equivalent to adding weights
to special users, and would be implemented in a similar way. 

Yeah it is similar, and actual it's inspired by what you mentioned above, weight=x means x
unit users. Thus we will only have a identical MULP in the queue, but have different weights.
Which in my mind is easier to be understood than overwriting MULP.

bq. If I understand correctly, you are saying that the weighted approach gives more flexibility
for future features like user quota, weighted user fair share, etc. Is that correct?

Yes because we may not want to continue MULP in the future, but we can continue use weight
of users.

> Capacity Scheduler: Support user-specific minimum user limit percent
> --------------------------------------------------------------------
>
>                 Key: YARN-5892
>                 URL: https://issues.apache.org/jira/browse/YARN-5892
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>         Attachments: YARN-5892.001.patch, YARN-5892.002.patch
>
>
> Currently, in the capacity scheduler, the {{minimum-user-limit-percent}} property is
per queue. A cluster admin should be able to set the minimum user limit percent on a per-user
basis within the queue.
> This functionality is needed so that when intra-queue preemption is enabled (YARN-4945
/ YARN-2113), some users can be deemed as more important than other users, and resources from
VIP users won't be as likely to be preempted.
> For example, if the {{getstuffdone}} queue has a MULP of 25 percent, but user {{jane}}
is a power user of queue {{getstuffdone}} and needs to be guaranteed 75 percent, the properties
for {{getstuffdone}} and {{jane}} would look like this:
> {code}
>   <property>
>     <name>yarn.scheduler.capacity.root.getstuffdone.minimum-user-limit-percent</name>
>     <value>25</value>
>   </property>
>   <property>
>     <name>yarn.scheduler.capacity.root.getstuffdone.jane.minimum-user-limit-percent</name>
>     <value>75</value>
>   </property>
> {code}



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