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Posted to yarn-issues@hadoop.apache.org by "Subru Krishnan (JIRA)" <ji...@apache.org> on 2017/10/04 01:26:02 UTC

[jira] [Updated] (YARN-5255) Move ResourceRequest expansion for Delay Scheduling to the Scheduler

     [ https://issues.apache.org/jira/browse/YARN-5255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Subru Krishnan updated YARN-5255:
---------------------------------
    Issue Type: Improvement  (was: Sub-task)
        Parent:     (was: YARN-4879)

> Move ResourceRequest expansion for Delay Scheduling to the Scheduler
> --------------------------------------------------------------------
>
>                 Key: YARN-5255
>                 URL: https://issues.apache.org/jira/browse/YARN-5255
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>
> YARN-4879 proposes to enhance the Allocate Request by introducing an id to explicitly identify a ResourceRequest.
> Currently, if relaxLocality == true, a Node specific request is expanded to rack and *ANY* request by the {{AMRMClient}} before being sent to the Scheduler. The requires the 3 copies to perform locality specific delay scheduling.
> It would be better to perform the expansion in the Scheduler itself, rather than the client, since:
> # The expansion is not really specified in the ApplicationMasterProtocol, a non-java client will have to duplicate the expansion logic.
> # Refactor out a lot of unnecessary code in the {{AMRMClientImpl}}



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