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https://issues.apache.org/jira/browse/YARN-8945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tao Yang updated YARN-8945:
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Summary: Calculation of maximum applications should respect specified and
global maximum applications for absolute resource (was: Calculation of Maximum
applications should respect specified and global maximum applications for
absolute resource)
> Calculation of maximum applications should respect specified and global
> maximum applications for absolute resource
> ------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-8945
> URL: https://issues.apache.org/jira/browse/YARN-8945
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 3.2.0
> Reporter: Tao Yang
> Assignee: Tao Yang
> Priority: Major
>
> Currently maximum applications is expected to be calculated as follow
> according to priority when using percentage based capacity：
> (1) equals specified maximum applications for queues
> (2) equals global maximum applications
> (3) calculated as queue-capacity * maximum-system-applications
> But for absolute resource configuration, maximum applications is calculated
> as (3) in ParentQueue#deriveCapacityFromAbsoluteConfigurations, this is a
> strict limit for high max-capacity and low capacity queues which have little
> guaranteed resources but want to use lots of share resources. So I propose to
> share the maximum applications calculation of percentage based capacity,
> absolute resource can call the same calculation if necessary.
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