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https://issues.apache.org/jira/browse/YARN-5892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15891256#comment-15891256
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Eric Payne commented on YARN-5892:
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{quote}
So I preferred to keep the semantic more similar to existing one, I propose to
introduce a weight of users instead of overriding the MULP: scheduler will
continue assign MULP% shares to each "unit users", but different user can have
different weight to adjust quota based on share of "unit users". Also, the
weights of users can be used independent from MULP: because in the future we
may want to replace concept of user limit by different ones. (Like setting
quota for each user, give weighted fair share to users, etc.)
{quote}
Thanks [~leftnoteasy] for your review.
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. 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?
> 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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