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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5164) CapacityOvertimePolicy does not take advantaged of plan RLE
Date Wed, 13 Jul 2016 23:12:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15375971#comment-15375971
] 

Chris Douglas commented on YARN-5164:
-------------------------------------

Only minor nits, otherwise +1:
{{CapacityOverTimePolicy}}
- Avoid importing java.util.\*
- Where the intermediate points are added, the code would be more readable if the key were
assigned to a named variable (instead of multiple calls to {{e.getKey()}}). Same with the
point-wise integral computation
- checkstyle (spacing): {{+      if(e.getValue()!=null) {}}
- A comment briefly sketching the algorithm would help future maintainers

{{NoOverCommitPolicy}}
- The exception message should be reformatted (some redundant string concats) and omit references
to the time it no longer reports
- Should the {{PlanningException}} be added as a cause, rather than concatenated with the
ReservationID?

> CapacityOvertimePolicy does not take advantaged of plan RLE
> -----------------------------------------------------------
>
>                 Key: YARN-5164
>                 URL: https://issues.apache.org/jira/browse/YARN-5164
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler, fairscheduler, resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>         Attachments: YARN-5164-example.pdf, YARN-5164-inclusive.4.patch, YARN-5164-inclusive.5.patch,
YARN-5164.1.patch, YARN-5164.2.patch, YARN-5164.5.patch, YARN-5164.6.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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