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https://issues.apache.org/jira/browse/YUNIKORN-3465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated YUNIKORN-3465:
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Labels: pull-request-available (was: )
> [scheduler-interface] Add victimAllocationKeys in
> PreemptionPredicatesResponse for minimal preemption
> -----------------------------------------------------------------------------------------------------
>
> Key: YUNIKORN-3465
> URL: https://issues.apache.org/jira/browse/YUNIKORN-3465
> Project: Apache YuniKorn
> Issue Type: Improvement
> Reporter: Hedger Lai
> Assignee: Hedger Lai
> Priority: Major
> Labels: pull-request-available
>
> Currently, {{PreemptionPredicatesResponse}} only returns a scalar {{index}}.
> In {{yunikorn-core}}, this forces Core to unconditionally evict all candidate
> allocations sequentially from index {{0}} through {{index}}, leading to
> over-preemption of innocent pods that do not violate predicates.
> Under YUNIKORN-3460, we are introducing reprieve verification in k8shim to
> achieve minimal victim preemption. To convey the pruned victims back to Core,
> we propose adding an optional {{victimAllocationKeys}} field:
> {code:protobuf}
> message PreemptionPredicatesResponse {
> bool success = 1;
> int32 index = 2;
> map<string, int32> errorMessage = 3;
> repeated string victimAllocationKeys = 4;
> }
> {code}
> *Compatibility*: If {{victimAllocationKeys}} is empty, Core falls back to
> legacy index-based eviction ({{0..index}}). When populated, Core only evicts
> the specified allocations.
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