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From "Konstantinos Karanasos (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2882) Introducing container types
Date Fri, 21 Nov 2014 19:14:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14221288#comment-14221288
] 

Konstantinos Karanasos commented on YARN-2882:
----------------------------------------------

[~Sujeet Varakhedi] The scope of pre-emption/killing is not only within an application. Whenever
a guaranteed-start task arrives in an NM that cannot accommodate its execution due to running
queueable tasks, it is allowed to pre-empt/kill one or more of those, even if they belong
to another application.
Clearly there can be policies that decide which of the running queueable tasks to pre-empt/kill
(and one of them could be to avoid pre-empting/killing a task of another application, if there
is a good reason for that).

> Introducing container types
> ---------------------------
>
>                 Key: YARN-2882
>                 URL: https://issues.apache.org/jira/browse/YARN-2882
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Konstantinos Karanasos
>
> This JIRA introduces the notion of container types.
> We propose two initial types of containers: guaranteed-start and queueable containers.
> Guaranteed-start are the existing containers, which are allocated by the central RM and
are instantaneously started, once allocated.
> Queueable is a new type of container, which allows containers to be queued in the NM,
thus their execution may be arbitrarily delayed.



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