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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1338) Recover localized resource cache state upon nodemanager restart
Date Fri, 16 May 2014 11:14:44 GMT

    [ https://issues.apache.org/jira/browse/YARN-1338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13999558#comment-13999558
] 

Junping Du commented on YARN-1338:
----------------------------------

Hi [~jlowe], thanks for contributing a patch here. Looks like the latest patch include some
code in YARN-1987 which is already committed. Would you mind to update it so that I can start
to review and comment? Thanks! 

> Recover localized resource cache state upon nodemanager restart
> ---------------------------------------------------------------
>
>                 Key: YARN-1338
>                 URL: https://issues.apache.org/jira/browse/YARN-1338
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>    Affects Versions: 2.3.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>         Attachments: YARN-1338.patch, YARN-1338v2.patch, YARN-1338v3-and-YARN-1987.patch
>
>
> Today when node manager restarts we clean up all the distributed cache files from disk.
This is definitely not ideal from 2 aspects.
> * For work preserving restart we definitely want them as running containers are using
them
> * For even non work preserving restart this will be useful in the sense that we don't
have to download them again if needed by future tasks.



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