Am 12.10.2013 17:04, schrieb teknet9: > I have many users i can not allow for any downtime (not even few seconds)
says who? "not even a few seconds" is unrealistic even at normal operations e-mail is not a real-time messenger > Also i can not loose any single email why should you? you most likely would by partial migrations over months > Your solution will not guarantee that 1) a short downtime does not matter 2) you do not lose email due downtime 3) incoming mail are deferred by the sender at downtime 4) hot rsync followed by a cold one due downtime is ultra fast 5) imapsync exists normally one would migrate the *complete* server at once and if it is only a new machine at the same location make the last imapsync in a short downtime-frame while the old server does no longer accept connections from outside that all scripted and at last step the old machine becomes a spare-IP address while the new ones network interface is started with the IP address of the live machine
