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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-18) Make locatlity in YARN's container assignment and task scheduling pluggable for other deployment topology
Date Tue, 26 Mar 2013 18:13:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-18?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614383#comment-13614383
] 

Luke Lu commented on YARN-18:
-----------------------------

The original patch were already broken up into YARN-18 and YARN-19. YARN-18 makes topology
aware classes pluggable. The patch itself is fairly straightforward: server side factory and
app side factory to create topology aware classes. There is no behavior change by default.
The latest looks big but fair amount of changes were trivial amendments due to the timeout
requirement in unit tests.


                
> Make locatlity in YARN's container assignment and task scheduling pluggable for other
deployment topology
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-18
>                 URL: https://issues.apache.org/jira/browse/YARN-18
>             Project: Hadoop YARN
>          Issue Type: New Feature
>    Affects Versions: 2.0.3-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>              Labels: features
>         Attachments: HADOOP-8474-ContainerAssignmentTaskScheduling-pluggable.patch, MAPREDUCE-4309.patch,
MAPREDUCE-4309-v2.patch, MAPREDUCE-4309-v3.patch, MAPREDUCE-4309-v4.patch, MAPREDUCE-4309-v5.patch,
MAPREDUCE-4309-v6.patch, MAPREDUCE-4309-v7.patch, YARN-18.patch, YARN-18-v2.patch, YARN-18-v3.1.patch,
YARN-18-v3.2.patch, YARN-18-v3.patch, YARN-18-v4.1.patch, YARN-18-v4.2.patch, YARN-18-v4.3.patch,
YARN-18-v4.patch, YARN-18-v5.1.patch, YARN-18-v5.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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