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https://issues.apache.org/jira/browse/MAPREDUCE-1723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12860197#action_12860197
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Hemanth Yamijala commented on MAPREDUCE-1723:
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bq. the proportion of Map & Reduce slots in our cluster would ideally be 3:4
You mean, 3 maps out of 4 slots ?
> Capacity Scheduler should allow configuration of Map & Reduce task slots
> independently per queue
> ------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1723
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1723
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/capacity-sched
> Affects Versions: 0.20.1
> Environment: all
> Reporter: Subramaniam Krishnan
> Fix For: 0.20.3
>
>
> The Capacity Scheduler allows configuration of percentage of task slots per
> queue. We have a scenario in which our biggest queue (50% quota) has Jobs
> with mainly Map tasks & we need to enforce strict capacity limits per queue
> due to SLA requirements. So other smaller queues which require Reduce tasks
> gets starved even though the Reduce slots are idle. The Grid can be more
> efficiently utilized if Capacity Scheduler allows configuration of Map &
> Reduce task slots capacity independently per queue.
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