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https://issues.apache.org/jira/browse/MESOS-3765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15093455#comment-15093455
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Fan Du commented on MESOS-3765:
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[~gyliu] The proposal document states "DRF will be disabled with Fine-Grained
Resource Offers." , I am wondering why fine grained offer should bypass WDRF in
practice?
By my understanding, impliments fine grained offer fits well inside current
WDRF logic, because of current allocation behavior:
Foreach Slave
Foreach Role
Foreach Framework within the role
compute agent resources of revocable case OR
compute agent resources of non-revocable case <- (*A)
offer the agent resources to current framework <- (*B)
Each slave will grant at most one time allocation offer for the first framework
within a role, if there is no revocalbe frameworks;
Each slave will grant at most two times allocations offer for one non-revocable
and one revocalbe framework.
If we apply granuality between (*A) and (*B), it would be perfet to make loops
to iterate remaining framworks,
the the goal to spread agent resource between frameworks is done.
> Make offer size adjustable (granularity)
> ----------------------------------------
>
> Key: MESOS-3765
> URL: https://issues.apache.org/jira/browse/MESOS-3765
> Project: Mesos
> Issue Type: Improvement
> Components: allocation
> Reporter: Alexander Rukletsov
> Assignee: Guangya Liu
>
> The built-in allocator performs "coarse-grained" allocation, meaning that it
> always allocates the entire remaining agent resources to a single framework.
> This may heavily impact allocation fairness in some cases, for example in
> presence of numerous greedy frameworks and a small number of powerful agents.
> A possible solution would be to allow operators explicitly specify
> granularity via allocator flags. While this can be tricky for non-standard
> resources, it's pretty straightforward for {{cpus}} and {{mem}}.
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