Peter Bacsko created YUNIKORN-2206:
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Summary: 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
Inside Application.tryAllocate() and tryReservedAllocate(), we have code like:
{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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