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Sunil G commented on YARN-5892:
-------------------------------
[~eepayne]
Thanks for the work here.
I have few doubts related to YARN-2113 and this patch together. I remember you tested these
two patches together.
# Give user-weight is 0, we can get user-limit for certain users as 0. Hence intra-queue preemption
module could preempt all containers of user with 0 weight leaving its AM containers behind.
# Similar behavior could occur if there are few users in the cluster whose weights are below
1 (and together the sum of weights is less than 1). These edge cases could force more preemption.
Could you please help to confirm the same.
> 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: Active users highlighted.jpg, YARN-5892.001.patch, YARN-5892.002.patch,
YARN-5892.003.patch, YARN-5892.004.patch, YARN-5892.005.patch, YARN-5892.006.patch, YARN-5892.007.patch,
YARN-5892.008.patch, YARN-5892.009.patch, YARN-5892.010.patch, YARN-5892.012.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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