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From "Binglin Chang (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3246) Make Task extensible to support modifications of Task or even alternate programming paradigms
Date Mon, 31 Oct 2011 14:59:33 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Binglin Chang updated MAPREDUCE-3246:
-------------------------------------

    Attachment: MAPREDUCE-3246-extensible-task.patch
    
> Make Task extensible to support modifications of Task or even alternate programming paradigms
> ---------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3246
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3246
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>    Affects Versions: 0.23.0
>            Reporter: Binglin Chang
>            Assignee: Binglin Chang
>         Attachments: MAPREDUCE-3246-extensible-task.patch
>
>
> One of MRv2's goal is to support alternate programming paradigms, but building a application
using YARN from the bottom is not trivial. In fact most component of MapReduce can be reused,
mostly the scheduler/master side, and we can make changes/extensions only on the task/slave
side, such as native tasks, hash-aggregation style combiner/reducer interfaces.
> The first thing to do I think is to make task/slave side extensible, more specific, the
Task in JvmTask should serialized with class name, not simply a boolean isMap, and make task
class name configurable in JobConf, there maybe other minor changes. By doing so, developers
can at least extends their own MapTask/ReduceTask.
> I just post my initial thoughts here for opinions. If this change is OK, I can submit
a patch, this is just a trivial work.

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