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https://issues.apache.org/jira/browse/MAPREDUCE-1761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867299#action_12867299
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Matei Zaharia commented on MAPREDUCE-1761:
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Looks good, thanks!
> FairScheduler should allow separate configuration of node and rack locality
> wait time
> -------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1761
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1761
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 0.22.0
> Reporter: Scott Chen
> Assignee: Scott Chen
> Fix For: 0.22.0
>
> Attachments: MAPREDUCE-1761-v1.1.txt, MAPREDUCE-1761-v1.2.txt,
> MAPREDUCE-1761.txt
>
>
> It would be nice that we can separately assign rack locality wait time.
> In our use case, we would set node locality wait to zero and wait only rack
> locality.
> I propose that we add two parameters
> mapred.fairscheduler.locality.delay.nodetorack
> mapred.fairscheduler.locality.delay.racktoany
> This allows specifying the wait time on each stage.
> And we can use
> mapred.fairscheduler.locality.delay
> as the default value of the above fields so that this is backward compatible.
> Thoughts?
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