[jira] [Commented] (MESOS-8456) Allocator should allow roles to burst above guarantees but below limits.

["Meng Zhu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-8456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16855307#comment-16855307 ] 

Meng Zhu commented on MESOS-8456:
---------------------------------

Some preparation patch:

{noformat}
commit 31ac45be0a55fc33982641516bcc5eb3226ef406
Author: Meng Zhu <mz...@mesosphere.io>
Date:   Tue May 28 16:28:28 2019 +0200

    Added a function to shrink `Resources` to target `ResourceLimits`.

    Also added unit tests.

    Review: https://reviews.apache.org/r/70737

commit 8d372e14b0240aa5735a7c0cf36e03e7b3344bd1
Author: Meng Zhu <mz...@mesosphere.io>
Date:   Tue May 28 16:27:16 2019 +0200

    Added methods to subtract `ResourceQuantities` from `ResourceLimits`.

    This patch also makes `ResourceLimits` a friend class of
    `ResourceQuantities` to achieve one-pass operation complexities.

    Also added unit test.

    Review: https://reviews.apache.org/r/70735
{noformat}


> Allocator should allow roles to burst above guarantees but below limits.
> ------------------------------------------------------------------------
>
>                 Key: MESOS-8456
>                 URL: https://issues.apache.org/jira/browse/MESOS-8456
>             Project: Mesos
>          Issue Type: Improvement
>          Components: allocation
>            Reporter: Meng Zhu
>            Assignee: Meng Zhu
>            Priority: Major
>              Labels: Mesosphere, multitenancy
>
> Currently, allocator only allocates resources for quota roles up to their guarantee in the first allocation stage. The allocator should continue allocating resources to these roles in the second stage below their quota limit. In other words, allocator should allow roles to burst above their guarantee but below the limit.



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