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https://issues.apache.org/jira/browse/MESOS-5526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Mahler updated MESOS-5526:
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Component/s: framework api
> Allow schedulers to revoke resources to obtain their quota or fair share.
> -------------------------------------------------------------------------
>
> Key: MESOS-5526
> URL: https://issues.apache.org/jira/browse/MESOS-5526
> Project: Mesos
> Issue Type: Epic
> Components: allocation, framework api
> Reporter: Benjamin Mahler
>
> In order to ensure fairness and quota guarantees are met in a dynamic
> cluster, we need to ensure that schedulers can revoke existing revocable
> allocations in order to obtain their fair share or their quota. Otherwise,
> schedulers must wait (potentially forever!) until existing allocations are
> freed. This is a policy that completely favors work conservation, in favor of
> meeting the fairness and quota guarantees in a bounded amount of time.
> As we expose resource constraints to schedulers (MESOS-5524), they will be
> able to determine when Mesos will allow them to revoke resources. For example:
> * If a scheduler is below its fair share, the scheduler may revoke existing
> revocable resources that are offered to it.
> * If a scheduler is below its quota, it can revoke existing revocable
> resources in order to consume it for quota in a non-revocable manner.
> This is orthogonal to optimistic or pessimistic allocation, in that either
> approaches need to allow the schedulers to perform revocation in this manner.
> In the pessimistic approach, we may confine what the scheduler can revoke,
> and in an optimistic approach, we may provide more choice to the scheduler.
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