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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-314) Schedulers should allow resource requests of different sizes at the same priority and location
Date Thu, 09 Jun 2016 21:06:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323354#comment-15323354
] 

Jason Lowe commented on YARN-314:
---------------------------------

bq. Do we have applications that need this capability?

Tez can sometimes end up asking for multiple sizes at the same priority, and that sometimes
ends up causing jobs to hang.  See TEZ-3296.

> Schedulers should allow resource requests of different sizes at the same priority and
location
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-314
>                 URL: https://issues.apache.org/jira/browse/YARN-314
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>    Affects Versions: 2.0.2-alpha
>            Reporter: Sandy Ryza
>         Attachments: yarn-314-prelim.patch
>
>
> Currently, resource requests for the same container and locality are expected to all
be the same size.
> While it it doesn't look like it's needed for apps currently, and can be circumvented
by specifying different priorities if absolutely necessary, it seems to me that the ability
to request containers with different resource requirements at the same priority level should
be there for the future and for completeness sake.



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