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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1307) Rethink znode structure for RM HA
Date Thu, 19 Dec 2013 00:52:08 GMT

     [ https://issues.apache.org/jira/browse/YARN-1307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vinod Kumar Vavilapalli updated YARN-1307:

    Attachment: YARN-1307.13.patch

The last patch looks good. Minor changes:

 - Renamed
    -- RMDTDelegationToken node to RMDelegationTokensRoot
    -- RMDelegationKey node to RMDTMasterKeysRoot node
    -- masterKeyRootPath field to dtMasterKeysRootPath
    -- delegationTokenPath to delegationTokensRootPath
    -- nodeCreatePath to nodeUpdatePath
    -- attemptName to attemptIDStr
 - Removed the useless appAttemptID check.

Will check it in if Jenkins says okay.

> Rethink znode structure for RM HA
> ---------------------------------
>                 Key: YARN-1307
>                 URL: https://issues.apache.org/jira/browse/YARN-1307
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-1307.1.patch, YARN-1307.10.patch, YARN-1307.11.patch, YARN-1307.12.patch,
YARN-1307.13.patch, YARN-1307.2.patch, YARN-1307.3.patch, YARN-1307.4-2.patch, YARN-1307.4-3.patch,
YARN-1307.4.patch, YARN-1307.5.patch, YARN-1307.6.patch, YARN-1307.7.patch, YARN-1307.8.patch,
YARN-1307.9.patch, YARN-1307.9.patch
> Rethink for znode structure for RM HA is proposed in some JIRAs(YARN-659, YARN-1222).
The motivation of this JIRA is quoted from Bikas' comment in YARN-1222:
> {quote}
> We should move to creating a node hierarchy for apps such that all znodes for an app
are stored under an app znode instead of the app root znode. This will help in removeApplication
and also in scaling better on ZK. The earlier code was written this way to ensure create/delete
happens under a root znode for fencing. But given that we have moved to multi-operations globally,
this isnt required anymore.
> {quote}

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