Large imap server.

Erik Norgaard norgaard at
Thu Feb 9 00:59:09 PST 2006

Bill Campbell wrote:
> On Wed, Feb 08, 2006, Erik Norgaard wrote:
>> AFAIK cyrus-imap uses a database backend to store mail and has been 
>> designed to scale to enterprise systems. The database backend makes 
>> indexing and mail lookup faster, but I don't think there's any 
>> difference when it comes to retrieving the actual mail.
> Cyrus scaling?  Perhaps on one mongo server.  We have installed
> multiple servers with courier-imap delivering and serving pop and
> imap from a central server housing home directories, and have
> seen essentially linear performance as servers are added.
> One can index mail stores with something like glimpse, but that's
> probably an issue only were there are huge numbers of messages in
> individual folders.

I don't claim that courier-imap does not scale, in fact, I don't claim 
anything about courier-imap at all. I simply remark that cyrus-imap has 
been designed to scale well and this is achieved by using a data base 

Your comment does not prove me wrong: You seem to indicate that 
cyrus-imap doesn't scale and refer to a successful install of 
courier-imap. This doesn't make sense - that logic is flawed.

You can only claim that you have found courier-imap scales fine. Well, 
that's good, then there is choice.

Cheers, Erik
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