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https://issues.apache.org/jira/browse/YARN-6021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15778234#comment-15778234
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Feng Yuan commented on YARN-6021:
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Greatlly,I think i get your means.
Like that,for some temporary queue,such as created by the policy(user,group).
Which minshare is default(0).Is there someway to set it`s minshare beyound 0.So
we can let
it get fairshare a positive num.
Or if i can create a new issue(new feature) to implement this? [~kasha]
Hope your suggestion!
> When your allocated minShare of all queue`s added up exceed cluster capacity
> you can get some queue for 0 fairshare
> -------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-6021
> URL: https://issues.apache.org/jira/browse/YARN-6021
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.4.0
> Reporter: Feng Yuan
> Assignee: Feng Yuan
> Priority: Critical
>
> In fair-scheduler.xml,If you config the minshare add up exceed parentQueue`s
> fairshare,for root`s childs,fairshare is cluster capacity.
> You will found your R value look like below when compute childs fairshares:
> 1.0
> 0.5
> 0.25
> 0.125
> 0.0625
> 0.03125
> 0.015625
> 0.0078125
> 0.00390625
> I find this is due to:
> double rMax = 1.0;
> while (resourceUsedWithWeightToResourceRatio(rMax, schedulables, type)
> < totalResource) {
> rMax *= 2.0;
> }
> because resourceUsedWithWeightToResourceRatio will add minShare together.
> As i think is really should we bring in minShare when compute fairshare?
> My advice is we just consider weight is enough,and minshare's guarantee
> will get fulfill when assginContainer!
> Hope suggestion!
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