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From Zachary Zolton <zachary.zol...@gmail.com>
Subject Re: Multi-Step Map/Reduce?
Date Tue, 31 Mar 2009 03:50:44 GMT
@jchris is that similar to what you meant?

On Mon, Mar 30, 2009 at 10:49 PM, Zachary Zolton
<zachary.zolton@gmail.com> wrote:
> I've been thinking, if there was just a reasonable way to replicate
> another database with the output of a view, then you could just write
> regular one-pass map/reduce views on the "derived" database.
>
> That would seem to cause fewer ripples across the codebase.
>
> On Mon, Mar 30, 2009 at 10:40 PM, Chris Anderson <jchris@apache.org> wrote:
>> On Mon, Mar 30, 2009 at 6:48 PM, Zachary Zolton
>> <zachary.zolton@gmail.com> wrote:
>>> Devs,
>>>
>>> Has there been any discussion of using multiple rounds of map/reduce
>>> for CouchDB views?
>>>
>>> If were possible, and the view could be indexed within acceptable
>>> bounds of memory and processing time, I could see using it situations
>>> where the current one-pass solution proves difficult or requires
>>> multiple queries.
>>
>> I think the simplest way to add value would be to make a way to bounce
>> a group_level reduce query to documents in another database. Then you
>> could use views to sort them by value etc.
>>
>>>
>>> Also, I tend to be daft, so I'd appreciate hearing if this idea is
>>> silly or simply outside of the scope of CouchDB!
>>>
>>
>>
>> I think it sounds great.
>>
>> Chris
>>
>> --
>> Chris Anderson
>> http://jchrisa.net
>> http://couch.io
>>
>

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