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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4309) Make locatlity in YARN's container assignment and task scheduling pluggable for other deployment topology
Date Fri, 06 Jul 2012 05:27:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13407714#comment-13407714
] 

Junping Du commented on MAPREDUCE-4309:
---------------------------------------

Yes. I cancelled the patch and now am doing refactoring work. Like your suggestion (also what
we did before on InnerNode in NetworkTopology), I will keep ScheduledRequest stay as inner
class. Will update patch and mark "Patch Available" soon. 
                
> Make locatlity in YARN's container assignment and task scheduling pluggable for other
deployment topology
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4309
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4309
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HADOOP-8474-ContainerAssignmentTaskScheduling-pluggable.patch, MAPREDUCE-4309.patch
>
>
> There are several classes in YARN’s container assignment and task scheduling algorithms
that relate to data locality which were updated to give preference to running a container
on other locality besides node-local and rack-local (like nodegroup-local). This propose to
make these data structure/algorithms pluggable, like: SchedulerNode, RMNodeImpl, etc. The
inner class ScheduledRequests was made a package level class to it would be easier to create
a subclass, ScheduledRequestsWithNodeGroup.

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