Bron Gondwana wrote, at 01/10/2009 04:56 AM: > So - no filesystem is sacred. Except for bloody out1 with its 1000+ > queued postfix emails and no replication. It's been annoying me for > over a year now, because EVERYTHING ELSE is replicated. We've got > some new hardware in place, so I'm investigating drbd as an option > here. Not convined. It still puts us at the mercy of a filesystem > crash. > > I'd prefer a higher level replication solution, but I don't know > any product that replicates outbound mail queues nicely between > multiple machines in a way that guarantees that every mail will be > delivered at least once, and if there's a machine failure the only > possible failure mode is that the second machine isn't aware that > the message hasn't been delivered yet, so delivers it again. That's > what I want. You could regularly rsync or rdiff-backup your Postfix queue directory to another machine where Postfix lies dormant, but with a similar configuration. In the event of a machine failure, you can start up Postfix on the backup, which may even be able to function as a complete replacement (submission, MX, delivery over LMTP). There is still opportunity for minor race conditions and automating failover needs to be worked out, but it's better than nothing. Jorey ( big fan of Bron's occasional parenthetical sig comments! ) ---- 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
