On Sat, Apr 01, 2006 at 09:21:26AM +0100, Owen O'Malley (JIRA) wrote:
> 
> Let's reopen this. I've had discussions with Runping today, and it seems to 
> me that:


> 3. It is less clear that we should allow the user to change the key
> type in the reduce, but since the current API does allow them to
> change the value (if not the type), I think we should be consistent
> and allow a type change too.

I strongly disagree.  I think it's unnecessary, and I think it breaks
the model too much.  Google has many thousands of map reduce
applications, and they haven't broken the model yet.  I don't really
care about output formats, but I think we're just asking for trouble if
we allow the type of the reduce output to be different from the type of
the map output.

-- 
Andrew McNabb
http://www.mcnabbs.org/andrew/
PGP Fingerprint: 8A17 B57C 6879 1863 DE55  8012 AB4D 6098 8826 6868

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