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From "Konstantinos Karanasos (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6593) [API] Introduce Placement Constraint object
Date Wed, 02 Aug 2017 02:46:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16110175#comment-16110175

Konstantinos Karanasos commented on YARN-6593:

Regarding the class with examples, as you say, let's move examples to a separate JIRA. Especially
given that placement constraints can be specified both at the container level (YARN-6594)
and the application level (YARN-6595). It would be good to give all the possible ways to define
constraints there.

I would like to understand better the use cases that would require allocation tags to have
values. But let's move the discussion to YARN-6594.
BTW, to be precise, allocation tags in constraints are modeled as a set of values (not a single
value) with key being null. We opted for this approach after discussions with [~leftnoteasy]
and [~arun.suresh@gmail.com] in order to not need multiple constraint objects if we want to
specify a list of tags in the constraint.

PS: I am traveling today, thus the late responses.

> [API] Introduce Placement Constraint object
> -------------------------------------------
>                 Key: YARN-6593
>                 URL: https://issues.apache.org/jira/browse/YARN-6593
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Konstantinos Karanasos
>            Assignee: Konstantinos Karanasos
>         Attachments: YARN-6593.001.patch, YARN-6593.002.patch, YARN-6593.003.patch, YARN-6593.004.patch,
YARN-6593.005.patch, YARN-6593.006.patch, YARN-6593.007.patch, YARN-6593.008.patch
> Just removed Fixed version and moved it to target version as we set fix version only
after patch is committed.

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