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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-3061) Generic application history service
Date Tue, 08 Jan 2013 11:54:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli reassigned MAPREDUCE-3061:
--------------------------------------------------

    Assignee: Vinod Kumar Vavilapalli  (was: Mayank Bansal)

Hey Mayank, I am taking this over to take a stab at it..
                
> Generic application history service
> -----------------------------------
>
>                 Key: MAPREDUCE-3061
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3061
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Luke Lu
>            Assignee: Vinod Kumar Vavilapalli
>             Fix For: 0.24.0
>
>
> The mapreduce job history server currently needs to be deployed as a trusted server in
sync with the mapreduce runtime. Every new application would need a similar application history
server. Having to deploy O(T*V) (where T is number of type of application, V is number of
version of application) trusted servers is clearly not scalable.
> Job history storage handling itself is pretty generic: move the logs and history data
into a particular directory for later serving. Job history data is already stored as json
(or binary avro). I propose that we create only one trusted application history server, which
can have a generic UI (display json as a tree of strings) as well. Specific application/version
can deploy untrusted webapps (a la AMs) to query the application history server and interpret
the json for its specific UI and/or analytics.

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