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Posted to yarn-issues@hadoop.apache.org by "Subramaniam Krishnan (JIRA)" <ji...@apache.org> on 2014/09/12 03:06:33 UTC

[jira] [Updated] (YARN-2475) ReservationSystem: replan upon capacity reduction

     [ https://issues.apache.org/jira/browse/YARN-2475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Subramaniam Krishnan updated YARN-2475:
---------------------------------------
    Attachment: YARN-2475.patch

Thanks [~chris.douglas] for reviewing the patch. I am uploading a patch that addresses all your comments (skipping relisting them).

bq. Why is the enforcement window tied to CapacitySchedulerConfiguration?

The replanner can be configured per plan which in turn translates to a leaf queue in capacity scheduler configuration. Consequently the enforcement window is configured for the replanner via the capacity scheduler leaf queue configuration.

> ReservationSystem: replan upon capacity reduction
> -------------------------------------------------
>
>                 Key: YARN-2475
>                 URL: https://issues.apache.org/jira/browse/YARN-2475
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>         Attachments: YARN-2475.patch, YARN-2475.patch
>
>
> In the context of YARN-1051, if capacity of the cluster drops significantly upon machine failures we need to trigger a reorganization of the planned reservations. As reservations are "absolute" it is possible that they will not all fit, and some need to be rejected a-posteriori.  



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