> > Current size of my Imap Server is 2500 users and currently 250 GByte of > > Mailboxes used (growing and growing). > Well, we will be talking about something in the range of above 50k > mailboxes, so a single machine is just out of question. And some sort > of standby will be needed. I didn't do the concept for this system, > though, I'm just the one who has to implement it ;) A single machine is not out of the question for that number of mailboxes, but is perhaps for the amount of traffic driven by your user behavior -- that's what you need to determine. We happily run 350k mailboxes on a single system with the determining factor being I/O contention during mail delivery. Depending on your storage, you won't necessarily be able to fix that contention by running multiple machines. I wouldn't count out a single machine with lots of (relatively small) storage pools to build performance. John -- John Madden Sr. UNIX Systems Engineer Ivy Tech Community College of Indiana jmadden@xxxxxxxxxxx ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
