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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1368) Common work to re-populate containers’ state into scheduler
Date Thu, 01 May 2014 01:03:06 GMT

    [ https://issues.apache.org/jira/browse/YARN-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13986270#comment-13986270
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Jian He commented on YARN-1368:
-------------------------------

Hi [~adhoot],  sure. Thanks for sharing the prototype. I looked at the patch.
I think the prototype  is doing as a scheduler-specifc fashion and only for the FairScheduler.
It'll be a maintenance  overhead if we implement each scheduler separately.  The prototype
recovers a portion of the FairScheduler by reusing some existing APIs,  but I think missed
some other state for the scheduler attempt, queue metrics, schedulerNode.
The patch submitted here is to experiment  a generic approach for recovering all scheduler
state including all entities(metrics, schedulerNode etc,)  with no or minimum scheduler-specific
changes.

> Common work to re-populate containers’ state into scheduler
> -----------------------------------------------------------
>
>                 Key: YARN-1368
>                 URL: https://issues.apache.org/jira/browse/YARN-1368
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-1368.preliminary.patch
>
>
> YARN-1367 adds support for the NM to tell the RM about all currently running containers
upon registration. The RM needs to send this information to the schedulers along with the
NODE_ADDED_EVENT so that the schedulers can recover the current allocation state of the cluster.



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