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https://issues.apache.org/jira/browse/MAPREDUCE-326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated MAPREDUCE-326:
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    Attachment: MAPREDUCE-326.pdf

Here's a proposal for a binary API for review.

> The lowest level map-reduce APIs should be byte oriented
> --------------------------------------------------------
>
>                 Key: MAPREDUCE-326
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-326
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: eric baldeschwieler
>         Attachments: MAPREDUCE-326.pdf
>
>
> As discussed here:
> https://issues.apache.org/jira/browse/HADOOP-1986#action_12551237
> The templates, serializers and other complexities that allow map-reduce to 
> use arbitrary types complicate the design and lead to lots of object creates 
> and other overhead that a byte oriented design would not suffer.  I believe 
> the lowest level implementation of hadoop map-reduce should have byte string 
> oriented APIs (for keys and values).  This API would be more performant, 
> simpler and more easily cross language.
> The existing API could be maintained as a thin layer on top of the leaner API.

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