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From: Christian Laursen <xi@borderworlds.dk>
Date: 22 Jun 2004 16:59:29 +0200
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Subject: Re: [OT] Re: What's the best possible email failover solution
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Bill Moran <wmoran@potentialtech.com> writes:

> Nico Meijer <nico.meijer@zonnet.nl> wrote:
> 
> > Hi Bill,
> > 
> > > The other option is to take what appears to be the best IMAP server out
> > > there (Cyrus) and figure out a way to do real-time mirroring of the
> > > mailboxes.
> > 
> > Depending on the size / number of messages: how about using rsync and 
> > OpenBSD's CARP?
> > 
> > True, it will not be realtime, but the synchronization (note the 
> > "depending" above) might take place regularly.
> 
> Problem is: rsyncing the mail directories takes about 20 minutes, and the
> only way to ensure that a good copy is achieved is to shut down Cyrus
> during the backup.  This makes it a little prohibitive to be doing this
> very often.

If you are running FreeBSD 5, you should be able to make a filesystem snapshot
and rsync from there.

-- 
Christian Laursen