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From "Jay Guo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-6637) Validate that schedulers cannot perform operations on offers with different allocation roles.
Date Wed, 30 Nov 2016 02:40:58 GMT

    [ https://issues.apache.org/jira/browse/MESOS-6637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15707302#comment-15707302
] 

Jay Guo commented on MESOS-6637:
--------------------------------

Could you elaborate on {quote}tasks, executors, and reservations individually don't mix roles{quote}
? I don't quite follow what you mean here, an example would be excellent! thx

> Validate that schedulers cannot perform operations on offers with different allocation
roles.
> ---------------------------------------------------------------------------------------------
>
>                 Key: MESOS-6637
>                 URL: https://issues.apache.org/jira/browse/MESOS-6637
>             Project: Mesos
>          Issue Type: Task
>          Components: master
>            Reporter: Benjamin Mahler
>
> With support for multi-role frameworks, offers contain allocation info (currently just
the role that the offer is being made to).
> In theory, schedulers could perform offer operations across multiple roles, so long as
the tasks, executors, and reservations individually don't mix roles. However, there doesn't
seem to be a clear reason to allow this. So, we will validate against combining offers from
multiple roles. This also makes it semantically consistent with single-role frameworks (since
they do not do this either).



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