On Tuesday 07 September 2004 14.38, Maykel Moya wrote: > I'm looking for documentation which help me to design a failover, > redundant and scalable mail system to handle 20K users with plans to > scale soon to about 50K. 20k or 50k users are not unheard of on a single server (obviously you'll need more than one if you speak about redundancy). But it depends heavily on the kind of users - how many messages per day (or per hour in peak times) do you expect? Size distribution of those messages? Are you serving IMAP or POP boxes, quota per user? 20k office workers with big IMAP boxes need a different box from 20k ISP home users with 10M POP accounts. If you intend to run things like spamassassin, you'll be looking at a very high CPU load (but you can easily off-load this.) On behalf of all joe-job victims: Whatever you do, *please* do it in a way that allows you to know whether mail is going to be delivered at the front-end incoming SMTP server. (should be trivial if your user database is in LDAP or some SQL db or whatever.) greetings -- vbi -- In der Ehe gibt's keine größern Fehler als die wiederkommenden. -- Jean Paul (eig. Johann Paul Friedrich Richter)
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