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https://issues.apache.org/jira/browse/YARN-5165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15308348#comment-15308348
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Carlo Curino commented on YARN-5165:
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The fix in {{TestSimpleCapacityReplanner}} is due to the fact that the previous
policy was relying on the {{DefaultResourceCalculator}} (which ignores
{{vcores}} in the calculations), and so we had missed a misconfiguration of the
{{vcores}} in the inital plan. The test should have failed. The new code
proposed in this patch, caught the issue, hence the test fix.
> NoOvercommitPolicy does not take advantage of RLE representation of plan
> ------------------------------------------------------------------------
>
> Key: YARN-5165
> URL: https://issues.apache.org/jira/browse/YARN-5165
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacityscheduler, fairscheduler, resourcemanager
> Reporter: Carlo Curino
> Assignee: Carlo Curino
> Attachments: YARN-5165.1.patch, YARN-5165.2.patch, YARN-5165.3.patch
>
>
> As a consequence small time granularities (e.g., 1 sec) and long time horizon
> for a reservation (e.g., months) run rather slow (10 sec).
> Proposed resolution is to switch to interval math in checking, similar to how
> YARN-4359 does for agents.
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