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https://issues.apache.org/jira/browse/MESOS-9688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Mahler reassigned MESOS-9688:
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Assignee: Benjamin Mahler
> Quota is not enforced properly when subroles have reservations.
> ---------------------------------------------------------------
>
> Key: MESOS-9688
> URL: https://issues.apache.org/jira/browse/MESOS-9688
> Project: Mesos
> Issue Type: Bug
> Components: allocation
> Reporter: Meng Zhu
> Assignee: Benjamin Mahler
> Priority: Critical
> Labels: resource-management
>
> Note: the discussion here concerns quota enforcement for top-level role,
> setting quota on sublevel role is not supported.
> If a subrole directly makes a reservation, the accounting of
> `roleConsumedQuota` will be off:
> https://github.com/apache/mesos/blob/master/src/master/allocator/mesos/hierarchical.cpp#L1703-L1705
> Specifically, in this formula:
> `Consumed Quota = reservations + allocation - allocated reservations`
> The `reservations` part does not account subrole's reservation to its
> ancestors. If a reservation is made directly for role "a/b", its reservation
> is accounted only for "a/b" but not for "a". Similarly, if a top role ( "a")
> reservation is refined to a subrole ("a/b"), the current code first subtracts
> the reservation from "a" and then track that under "a/b".
> We should make it hierarchical-aware.
> The "allocation" and "allocated reservations" are both tracked in the sorter
> where the hierarchical relationship is considered -- allocations are added
> hierarchically.
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