Christopher Chan wrote: > >> re: mail servers specifically, there are two seperate classes of >> storage that would need replication... One is the mail spools and >> queues as used by the MTA (postfix, sendmail, etc), and the other are >> the user mail folder(s) as used by the local delivery agent (procmail >> or whattever), and read by the mail client (pop, imap). > > No, mail spools/queues do not need replication. Stuff in the queue are > usually deleted in a second and such dynamic change is not worth > replicating. If you do put the queue on a distributed filesystem, in > most cases you cannot have more than one instance running save for > sendmail. > outbound mail can sit in queues retrying for hours negotiating their way into the greylists of the likes of Yahoo. I guess if you don't mind the possibility of messages getting lost around a server failure event, then its no big deal, for sure.