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From Brian Mitchell <>
Subject Re: Limit on the number of databases?
Date Thu, 26 May 2011 17:07:07 GMT

On Thursday, May 26, 2011 at 11:15 AM, Sam Bisbee wrote:

>  - On a non-performance note, you can't do map/reduce across
> databases. If you plan on referencing between them or combining data,
> then you're probably going to have a index database that some client
> code puts its results into.
That or it's reasonable to build a data warehouse which does this in an aggregate database
(via replication, possibly filtered). One benefit of having smaller databases is that view
generation is cheaper if you want to avoid downtime and don't want to deal with stale views
(not an option in many cases).

I've been investigating this too and will report on success if I achieve it, though at worst
I'll just fall back to a larger database with BigCouch and a very large Q-value (shard count).

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