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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2882) Add ExecutionType to denote if a container execution is GUARANTEED or OPPORTUNISTIC
Date Wed, 23 Dec 2015 23:54:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070329#comment-15070329
] 

Wangda Tan commented on YARN-2882:
----------------------------------

Hi [~asuresh],

Thanks for answering my question , but I still may not understand correctly:
- If opportunistic/guaranteed is solely decided by scheduler, is it possible that AM cannot
get container in predictable behavior? For example, LRS container will be guaranteed only.
Another example is MR job want to speculative tasks to be opportunistic only.
- Why add limitation to AMs that can only allocate for opportunistic resources. (your 2nd
point). 

> Add ExecutionType to denote if a container execution is GUARANTEED or OPPORTUNISTIC
> -----------------------------------------------------------------------------------
>
>                 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
>            Assignee: Konstantinos Karanasos
>         Attachments: YARN-2882-yarn-2877.001.patch, YARN-2882-yarn-2877.002.patch, YARN-2882-yarn-2877.003.patch,
YARN-2882-yarn-2877.004.patch, yarn-2882.patch
>
>
> 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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