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https://issues.apache.org/jira/browse/YUNIKORN-2206?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Bacsko resolved YUNIKORN-2206.
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Resolution: Won't Fix
> Make user/queue headroom checks more performant
> -----------------------------------------------
>
> Key: YUNIKORN-2206
> URL: https://issues.apache.org/jira/browse/YUNIKORN-2206
> Project: Apache YuniKorn
> Issue Type: Improvement
> Components: core - scheduler
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Minor
>
> Inside Application.tryAllocate() and tryReservedAllocate(), we have the
> following code:
> {noformat}
> if !userHeadroom.FitInMaxUndef(ask.GetAllocatedResource()) {
> continue
> }
> // check if this fits in the queue's headroom
> if !headRoom.FitInMaxUndef(ask.GetAllocatedResource()) {
> continue
> }
> {noformat}
> These calls are relatively expensive, but necessary. Calling them once isn't
> a problem.
> However, repeated calls are slowing things down considerably. Yunikorn keeps
> trying to schedule asks and until there's enough room for the request, these
> checks will fail. We need a way to speed it up.
> See YUNIKORN-2201 about the details.
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