On Tue, 7 Oct 2003, Ben Carter wrote: > > This is not the case. Simple DNS round-robining is sufficient. > > How is simple DNS round-robin sufficient? More than one MUA caches the DNS > lookups for its mail servers. I know that at least one version of > Netscape Communicator used to. It probably still does. Also, some webmail > clients do. So if a front-end is down or has not network connectivity, one > gets hung MUAs.
Er, I should have said dynamic dns style systems. Round robin, is, as you say, not sufficient. > That's another good point. However, is this still an issue if one does not > select the flat file format for the mailboxes file? Yes. Concurrent access to the mailbox list is an issue with every database format. > Has anyone implemented Cyrus IMAP with any type of clustering softwarethat > you know of? I've heard success stories in warm-spare situations where the filesystem is shared, but only one server is active at a time. -Rob -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456 Research Systems Programmer * /usr/contributed Gatekeeper
