Renaud Allard wrote: > Hello Nigel, > > On Mon, 27 Apr 2009 15:32:49 +0100 Nigel Metheringham > <[email protected]> wrote > > >> I'd appreciate a few pointers towards mechanisms/packages/ideas for >> doing this to ensure I don't miss any possibilities. >> >> We have a requirement for a mail server (SMTP receive, POP collection, >> IMAP not currently required) with a presence in 2 data centres, and >> able to maintain operation if either data centre or the link between >> them is unavailable. The ability to reconnect disjointed data centres >> without data loss (we could tolerate some resurrection of deleted >> messages) would be needed. There would be a huge number of >> mailboxes, but low activity on each mailbox - aggregate activity is >> not that high. >> >> Any ideas or suggestions? >> >> > > I used to have this kind of system working using unison > (http://www.cis.upenn.edu/~bcpierce/unison/) for the two way replication. > Assuming the messages don't change once they are written to disk, you can > configure unison with a good performance. I would suggest you to take the > latest > development version of unison as it has some improvements on how conflicts can > be solved if they occur. > You will of course need to use a Maildir storage for this to work. > > >
That unison looks interesting. I'm just wondering - is it better than just running rsync if you just want to get a backup of maildir directories every hour or so? -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
