Does anyone allow unlimited or extremely large quotas?

Michel Sébastien Sebastien.Michel at
Fri Nov 19 11:48:22 EST 2010

> Our biggest currently is about 30GB I think.

>> I think the issue you will encounter first is clients will start to fall
>> down when folders exceed a 'reasonable' number of messages.  Common IMAP
>> clients I've seen start to exhibit severe performance issues beyond a
>> few hundred thousand messages.

> On a 32 bit architecture: we had one folder with over a million messages
> which was causing processes to run out of virtual memory trying to map
> the cache file in.  This wouldn't be a problem with a 64 bit userland.

very impressive to have so much messages in one folder therefor in one partition!. But with so many messages in one folder, I think that cyrus.index and even more cyrus.cache are huge.
Is mmap still efficient ? map a gigabit file should cost a lot of I/O and a relatively long reponse time to just access the records of the most recent emails.

Is it time to break the design of one cyrus.index and cyrus.cache per folder by something more scalable ?

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