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Posted to mapreduce-issues@hadoop.apache.org by "Binglin Chang (Updated) (JIRA)" <ji...@apache.org> on 2011/11/01 04:24:33 UTC
[jira] [Updated] (MAPREDUCE-3246) Make Task extensible to support
modifications of Task or even alternate programming paradigms
[ 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.v2.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, MAPREDUCE-3246-extensible-task.v2.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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