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From "Neil Conway (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MESOS-7402) Allocated quota of a child role should be also charged on all ancestors of that role
Date Wed, 19 Apr 2017 19:09:41 GMT

     [ https://issues.apache.org/jira/browse/MESOS-7402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Neil Conway updated MESOS-7402:
-------------------------------
    Attachment: hrole_quota_test.patch

Attached is a test case for this problem (originally by Jay, a few minor tweaks by me).

I agree that this is a legitimate problem.

I'm not sure if there is an easy way to fix it, short of implementing full-blown support for
hierarchical quota (e.g., quota delegation).

For Mesos 1.3.0, we might consider disallowing quota to be set on hierarchical roles. i.e.,
quota could still be set on top-level roles, but not on a nested role. Then when we implement
proper quota delegation, this bug would naturally be fixed as part of that effort.

> Allocated quota of a child role should be also charged on all ancestors of that role
> ------------------------------------------------------------------------------------
>
>                 Key: MESOS-7402
>                 URL: https://issues.apache.org/jira/browse/MESOS-7402
>             Project: Mesos
>          Issue Type: Bug
>            Reporter: Jay Guo
>         Attachments: hrole_quota_test.patch
>
>
> Consider following case: role {{a}} is quota'd with resource 100, role {{a/b}} is quota'd
with resource 40. In current implementation, quota of parent role is actually the aggregation
of quota in whole subtree, including itself. Therefore, the internal node of {{a}} is actually
quota'd with 60, instead of 100. In another word, allocation made for quota of {{a/b}} should
also be charged from the quota of its parent.



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