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https://issues.apache.org/jira/browse/YARN-4360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15115851#comment-15115851
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Arun Suresh commented on YARN-4360:
-----------------------------------
Spent some time going over {{StageAllocatorGreedyRLE}}. I generally makes
sense.. I might be missing something, but :
# Instead of doing a {{planModificiations.addInterval(..)}} in the
{{trackProgress()}} method and then subsequently, remove the
{{tempAllocations}} if the requests is not satisfied, why not just perform the
{{planModification.addInterval()}} right before we return a successful
allocation, in line 179
> Improve GreedyReservationAgent to support "early" allocations, and
> performance improvements
> --------------------------------------------------------------------------------------------
>
> Key: YARN-4360
> URL: https://issues.apache.org/jira/browse/YARN-4360
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacityscheduler, fairscheduler, resourcemanager
> Affects Versions: 2.8.0
> Reporter: Carlo Curino
> Assignee: Carlo Curino
> Attachments: YARN-4360.2.patch, YARN-4360.3.patch, YARN-4360.5.patch,
> YARN-4360.patch
>
>
> The GreedyReservationAgent allocates "as late as possible". Per various
> conversations, it seems useful to have a mirror behavior that allocates as
> early as possible. Also in the process we leverage improvements from
> YARN-4358, and implement an RLE-aware StageAllocatorGreedy(RLE), which
> significantly speeds up allocation.
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