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https://issues.apache.org/jira/browse/MESOS-8916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Meng Zhu reassigned MESOS-8916:
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Assignee: Meng Zhu
> Allocation logic cleanup.
> -------------------------
>
> Key: MESOS-8916
> URL: https://issues.apache.org/jira/browse/MESOS-8916
> Project: Mesos
> Issue Type: Epic
> Components: allocation
> Reporter: Benjamin Mahler
> Assignee: Meng Zhu
> Priority: Major
>
> The allocation logic has grown organically and is now very hard to read and
> maintain. This epic will track cleanups to improve the readability of the
> core allocation logic:
> * Add a function for returning the subset of frameworks that are capable of
> receiving offers from the agent. This moves the capability checking out of
> the core allocation logic and means the loops can just iterate over a smaller
> set of framework candidates rather than having to write 'continue' cases.
> This covers the GPU_RESOURCES and REGION_AWARE capabilities.
> * Similarly, add a function that allows framework capability based filtering
> of resources. This pulls out the filtering logic from the core allocation
> logic and instead the core allocation logic can just all out to the
> capability filtering function. This covers the SHARED_RESOURCES,
> REVOCABLE_RESOURCES and RESERVATION_REFINEMENT capabilities. Note that in
> order to implement this one, we must refactor the shared resources logic in
> order to have the resource generation occur regardless of the framework
> capability (followed by getting filtered out via this new function if the
> framework is not capable).
> * Update the scalar quantity related functions to also strip static
> reservation metadata. Currently there is extra code in the allocator across
> many places (including the allocation logic) to perform this in the
> call-sites.
> * Track across allocation cycles or pull out the following into functions:
> quantity of quota that is currently "charged" to a role, amount of "headroom"
> that is needed/available for unsatisfied quota guarantees.
> * Pull out the resource shrinking function.
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