From owner-freebsd-questions@FreeBSD.ORG Sun Apr 9 23:06:43 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 106FB16A402 for ; Sun, 9 Apr 2006 23:06:43 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from mx00.pub.collaborativefusion.com (mx00.pub.collaborativefusion.com [206.210.89.199]) by mx1.FreeBSD.org (Postfix) with ESMTP id 52C3743D46 for ; Sun, 9 Apr 2006 23:06:42 +0000 (GMT) (envelope-from wmoran@collaborativefusion.com) Received: from localhost (monrovll-cuda1-24-53-251-44.pittpa.adelphia.net [24.53.251.44]) (AUTH: LOGIN wmoran, TLS: TLSv1/SSLv3,256bits,AES256-SHA) by wingspan with esmtp; Sun, 09 Apr 2006 19:06:41 -0400 id 0005642F.44399381.00016384 Date: Sun, 9 Apr 2006 19:06:40 -0400 From: Bill Moran To: "Marc G. Fournier" Message-Id: <20060409190640.6b89dcfc.wmoran@collaborativefusion.com> In-Reply-To: <20060409195020.T1096@ganymede.hub.org> References: <443731E5.9030209@greenmeadow.ca> <20060408074034.200f77a1.wmoran@collaborativefusion.com> <20060409002843.B1096@ganymede.hub.org> <20060409105550.0620530a.wmoran@collaborativefusion.com> <20060409195020.T1096@ganymede.hub.org> Organization: Collaborative Fusion X-Mailer: Sylpheed version 1.0.6 (GTK+ 1.2.10; i386-portbld-freebsd5.4) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: duane@greenmeadow.ca, freebsd-questions@freebsd.org Subject: Re: OT - Scalable email server solution needed X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Apr 2006 23:06:43 -0000 "Marc G. Fournier" wrote: > On Sun, 9 Apr 2006, Bill Moran wrote: [snip] > > I have only a small amount of experience with Cyrus. However: > > http://cyrusimap.web.cmu.edu/twiki/bin/view/Cyrus/Backup > > > > Based on that document, it appears as if you're dodging the bullet with > > backups. My interpretation is that Cyrus keeps mailboxes in some sort > > of db file. If a db file is being modified while you're backing it up, > > the backed up version will be inconsistent, thus the entire mailbox > > unusable. > > Agreed, but this db file is stored within the maibox itself, and which is > what Cyrus has a 'reconstruct' command to rebuild ... so, after a restore, > the first thing you run in 'reconstruct' to make sure you database(s) > match the mailbox ... > > > Compare this to Maildir, where each message is a seperate file. If > > you're backing up during access to a mailbox, a single message could end > > up corrupt, but this will not affect the rest of the mailbox. > > Oh, wait, I misunderstood your first paragraph ... Cyrus IMAP stores its > individual mail messages in a seperate file (old 'mh' kinda thing), but > there is a db file that maintains the 'state' informatin for the folder > (what messages have been read, marked deleted but not purged, etc) ... Hmm ... I apologize for the misinformation then. It seems like the link listed above could use some updating. -- Bill Moran Potential Technologies http://www.potentialtech.com