Date: Mon, 21 Jun 2004 21:06:30 -0700 From: Jason Taylor <jason@infinitebubble.com> To: Bill Moran <wmoran@potentialtech.com> Cc: questions@freebsd.org Subject: Re: What's the best possible email failover solution Message-ID: <40D7B046.6050405@infinitebubble.com> In-Reply-To: <20040621132006.2b1a296f.wmoran@potentialtech.com> References: <20040621132006.2b1a296f.wmoran@potentialtech.com>
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Bill Moran wrote: > Hey, > > I know questions like this get asked a lot, but I'm going to be really specific. > > I know how to set up failover with a backup MX. That's not what I'm looking > for. We have a cyrus-imap server with lots of users connecting via IMAP, > while everything gets backed up, this only happens once a night. Thus, if the > server were to go up in smoke right before the backup occurred, we'd lose > something like 23 hours worth of emails. > > Does anyone have a solution to provide real-time mirroring of IMAP folders? > I don't mind manual intervention to get the thing running again, I just want > to ensure that if an email is received, it's on both machines and can't get > lost. Is there a way to get real-time replication of cyrus (I'm no cyrus > guru, another fellow set this up) > > I'm not tied to Cyrus either, if there's another solution, I'd be happy to > implement it. > > I have an idea ... by using Dovecot with PostgreSQL storing the actual mail > folders, with Slony installed to provide real-time replication of the Postgres > database ... I don't know if Dovecot is able to store the actual mail folders > in Postgres yet, though ... Anyone? > I was able to dig up a few leads: http://www-uxsup.csx.cam.ac.uk/~dpc22/cyrus/replication.html http://216.239.57.104/search?q=cache:Xu7aew9dgpsJ:asg.web.cmu.edu/archive/message.php%3Fmailbox%3Darchive.cyrus-devel%26msg%3D594+cyrus+replication&hl=en http://www.irbs.net/internet/info-cyrus/0405/0279.html http://www.drbd.org/
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