From owner-freebsd-questions@FreeBSD.ORG Tue Jun 22 04:06:35 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3E82D16A4CF for ; Tue, 22 Jun 2004 04:06:35 +0000 (GMT) Received: from mail.infinitebubble.com (pia140-70.pioneernet.net [66.114.140.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id CA62A43D39 for ; Tue, 22 Jun 2004 04:06:32 +0000 (GMT) (envelope-from jason@infinitebubble.com) Received: from [192.168.1.1] (aurvandil.infinitebubble.com [192.168.1.1]) by mail.infinitebubble.com (Postfix) with ESMTP id B5C4B34A17; Mon, 21 Jun 2004 21:06:31 -0700 (PDT) Message-ID: <40D7B046.6050405@infinitebubble.com> Date: Mon, 21 Jun 2004 21:06:30 -0700 From: Jason Taylor User-Agent: Mozilla Thunderbird 0.6 (X11/20040604) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Bill Moran References: <20040621132006.2b1a296f.wmoran@potentialtech.com> In-Reply-To: <20040621132006.2b1a296f.wmoran@potentialtech.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: questions@freebsd.org Subject: Re: What's the best possible email failover solution X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Jun 2004 04:06:35 -0000 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/