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From Mikeal Rogers <>
Subject Re: How many databases are too many?
Date Thu, 27 Jan 2011 18:22:32 GMT
I know of one server that did over a million, of course not all were
highly active.

On Thursday, January 27, 2011, Zachary Zolton <> wrote:
> Johnny,
> CouchDB is known to handle thousands of databases per server, but
> depending on your usage you may need to do some tweaks for the max
> number of open databases/file descriptors:
> Cheers,
> Zach
> On Thu, Jan 27, 2011 at 10:06 AM, John Nelson
> <> wrote:
>> TLDR: Does CouchDB (conspiring with the OS?) handle thousands of databases
>> well or should I use the tried-and-true-but-aggravating mapping on
>> [group_id, ...] or is there a better pattern that I am unfamiliar with?
>> I'm building a web application that is group-oriented, by which I mean that
>> each user is interested in documents produced only by the group to which
>> they belong. There is no sharing of information across groups at all.
>> Since these groups are completely isolated, it seems logical to house each
>> one there own database but this makes the side of me familiar with RDBMS
>> very uncomfortable. I found one blog post by John Wood which suggested that
>> there "appears to be no “penalty” for hosting many databases within the same
>> CouchDB server." However, in my case, there would be roughly 1,000 - 5,000
>> groups. From what I understand, each database is stored as the data file
>> plus various index files. This would mean there are thousands of file
>> handles -- it seems like a bad idea.
>> Thanks in advance, Johnny

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