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From "Anubhav Srivastav (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-624) Support gang scheduling in the AM RM protocol
Date Wed, 25 Mar 2015 06:04:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14379352#comment-14379352
] 

Anubhav Srivastav commented on YARN-624:
----------------------------------------

Is there any progress on implementing this feature?

> Support gang scheduling in the AM RM protocol
> ---------------------------------------------
>
>                 Key: YARN-624
>                 URL: https://issues.apache.org/jira/browse/YARN-624
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, scheduler
>    Affects Versions: 2.0.4-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>
> Per discussion on YARN-392 and elsewhere, gang scheduling, in which a scheduler runs
a set of tasks when they can all be run at the same time, would be a useful feature for YARN
schedulers to support.
> Currently, AMs can approximate this by holding on to containers until they get all the
ones they need.  However, this lends itself to deadlocks when different AMs are waiting on
the same containers.



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