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Posted to mapreduce-issues@hadoop.apache.org by "Ryan Hennig (JIRA)" <ji...@apache.org> on 2012/07/20 21:17:34 UTC
[jira] [Updated] (MAPREDUCE-4468) Encapsulate FairScheduler
preemption logic into helper class
[ https://issues.apache.org/jira/browse/MAPREDUCE-4468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ryan Hennig updated MAPREDUCE-4468:
-----------------------------------
Attachment: MAPREDUCE-4468.patch
This change was made almost entirely with the automated refactoring tools in eclipse
> Encapsulate FairScheduler preemption logic into helper class
> ------------------------------------------------------------
>
> Key: MAPREDUCE-4468
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4468
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: scheduler
> Reporter: Ryan Hennig
> Priority: Minor
> Labels: refactoring, scheduler
> Fix For: 2.1.0-alpha
>
> Attachments: MAPREDUCE-4468.patch
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> I've extracted the preemption logic from the Fair Scheduler into a helper class so that FairScheduler is closer to following the Single Responsibility Principle. This may eventually evolve into a generalized preemption module which could be leveraged by other schedulers.
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