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https://issues.apache.org/jira/browse/YARN-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16189056#comment-16189056
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Yufei Gu edited comment on YARN-2162 at 10/2/17 11:34 PM:
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Run SLS with 400 nodes, 200 apps, and 2k containers. Both base line and patch 
YARN-2162 runs 20 times. 
!test-400nm-200app-2k_NODE_UPDATE.timecost.svg|thumbnail!. Please ignore the 
"Resource Type 0", it is the yarn-2162 patch actually. Don't see obvious 
performance regression. The patch version even performs a little better due to 
normal fluctuation.


was (Author: yufeigu):
Run SLS with 400 nodes, 200 apps, and 2k containers. Both base line and patch 
YARN-2162 runs 20 times. !attachment-name.jpg|thumbnail!. Please ignore the 
"Resource Type 0", it is the yarn-2162 patch actually. Don't see obvious 
performance regression. The patch version even performs a little better due to 
normal fluctuation.

> 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: test-400nm-200app-2k_NODE_UPDATE.timecost.svg, 
> YARN-2162.001.patch, YARN-2162.002.patch, YARN-2162.003.patch, 
> YARN-2162.004.patch, YARN-2162.005.patch, YARN-2162.006.patch, 
> YARN-2162.007.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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