If in a mail cluster, with multiple machines having access to a shared storage device (SAN, iSCSI) which is presented to the host as a normal block device (e.g. /dev/sda, hosting a normal ext3 filesystem), one of the mail nodes fails, what are the necessary Postfix steps to take over the queue on another host?
I _think_ it is sufficient to provide the same configuration files as on the node which failed, execute "postsuper -s" until the queue file names stop changing (which shouldn't happen at all, because it is the same physical filesystem) and then start up Postfix (of course, IP addresses and other resources need to be migrated as well, but that's not Postfix specific stuff) - or at least that's what "worked for me". What would happen to mails which weren't completely received when the original node crashed? Can I prevent qmgr from trying to deliver those? Do I have to? Stefan
