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From "Derek Dagit (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-256) Increase retention of applications in AppManager without sending more applications to the UI
Date Tue, 04 Dec 2012 20:36:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510004#comment-13510004
] 

Derek Dagit commented on YARN-256:
----------------------------------

It would not be beneficial to change the UI to be selective, because we use a map to store
each RMApp, which does not provide unordered.  We must send all of the RMApps to the UI each
time to give a consistent.

I think something must be done with this map in order to avoid the problem, and that's why
I'm thinking about the alternatives above.
                
> Increase retention of applications in AppManager without sending more applications to
the UI
> --------------------------------------------------------------------------------------------
>
>                 Key: YARN-256
>                 URL: https://issues.apache.org/jira/browse/YARN-256
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 0.23.5
>            Reporter: Derek Dagit
>            Assignee: Derek Dagit
>
> In very busy clusters we would like to retain applications longer so that users' links
will not expire too soon.  Very often links to application history expire before they can
be followed.
> Simply increasing max-completed applications has an adverse performance impact on the
applications list in the web UI because it presents the entire list of applications with a
request.
> Therefore, we would like some way to be able to increase the retention of applications
without increasing the number of applications sent to the Web UI.

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