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From "Konstantinos Karanasos (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2882) Add ExecutionType to denote if a container execution is GUARANTEED or QUEUEABLE
Date Tue, 08 Dec 2015 00:13:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15046023#comment-15046023

Konstantinos Karanasos commented on YARN-2882:

Thanks for the feedback, [~leftnoteasy]:

bq. How about renaming ExecutionType to guaranteed/opportunistic 
We opted for queueable instead of opportunistic, since queueable is more descriptive and shows
better the semantics. If you think queueable is a bad name, we could change it back to opportunistic.
bq. Is it necessary to put ExecutionType to ContainerStatus?
It is important to put ExecutionType in the ContainerStatus, because this way the RM can differentiate
between the different container/execution types. For instance, it should not account for resources
that are due to queueable containers. This way less changes will be required by the AM that
will not require to keep track of which containers are guaranteed and which are queueable.
bq. Why need to add ExecutionType to ContainerInitializationContext/ContainerTerminationContext?
Agreed. Even if it is needed in the future, you are right that it should not be part of this
patch, so I will go ahead and remove it.

> Add ExecutionType to denote if a container execution is GUARANTEED or QUEUEABLE
> -------------------------------------------------------------------------------
>                 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.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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