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Posted to yarn-issues@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2015/02/05 02:23:36 UTC

[jira] [Updated] (YARN-914) Support graceful decommission of nodemanager

     [ https://issues.apache.org/jira/browse/YARN-914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Junping Du updated YARN-914:
----------------------------
    Attachment: Gracefully Decommission of NodeManager (v1).pdf

Put a proposal of design doc for this feature after an offline discussion with [~mingma] and addressing [~jlowe] 's comments above. Review and comments are appreciated here.

> Support graceful decommission of nodemanager
> --------------------------------------------
>
>                 Key: YARN-914
>                 URL: https://issues.apache.org/jira/browse/YARN-914
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.0.4-alpha
>            Reporter: Luke Lu
>            Assignee: Junping Du
>         Attachments: Gracefully Decommission of NodeManager (v1).pdf
>
>
> When NMs are decommissioned for non-fault reasons (capacity change etc.), it's desirable to minimize the impact to running applications.
> Currently if a NM is decommissioned, all running containers on the NM need to be rescheduled on other NMs. Further more, for finished map tasks, if their map output are not fetched by the reducers of the job, these map tasks will need to be rerun as well.
> We propose to introduce a mechanism to optionally gracefully decommission a node manager.



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