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From "Subru Krishnan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5255) Move ResourceRequest expansion for Delay Scheduling to the Scheduler
Date Wed, 15 Jun 2016 22:15:10 GMT

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

Subru Krishnan updated YARN-5255:
    Issue Type: Sub-task  (was: Bug)
        Parent: 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: Sub-task
>            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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