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From "Craig Welch (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1039) Add parameter for YARN resource requests to indicate "long lived"
Date Wed, 28 Jan 2015 01:33:37 GMT

    [ https://issues.apache.org/jira/browse/YARN-1039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294557#comment-14294557
] 

Craig Welch commented on YARN-1039:
-----------------------------------

[~chris.douglas] what's the proper duration for a service which does not have a pre-defined
lifetime?  

This distinction is not really about "how long will it run" but more about "what is the lifecycle
of this app" - as [~stevel@apache.org] points out, is it session or batch oriented (something
which has a defined set of work, so it has a notion of progress to completion) or is it a
running process with an indeterminate/unknown lifetime which handles whatever work is sent
it's way (a service).  This is really the distinction needed here - it's a qualitative difference
regarding a lifecycle, the notion of an enumeration of lifecycle types makes sense for this.
 Users will often have no idea how long their application will run, but they will generally
have a clear notion of it's lifecycle.

> Add parameter for YARN resource requests to indicate "long lived"
> -----------------------------------------------------------------
>
>                 Key: YARN-1039
>                 URL: https://issues.apache.org/jira/browse/YARN-1039
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 3.0.0, 2.1.1-beta
>            Reporter: Steve Loughran
>            Assignee: Craig Welch
>         Attachments: YARN-1039.1.patch, YARN-1039.2.patch, YARN-1039.3.patch
>
>
> A container request could support a new parameter "long-lived". This could be used by
a scheduler that would know not to host the service on a transient (cloud: spot priced) node.
> Schedulers could also decide whether or not to allocate multiple long-lived containers
on the same node



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