Date: Sun, 9 Apr 2006 19:06:40 -0400 From: Bill Moran <wmoran@collaborativefusion.com> To: "Marc G. Fournier" <scrappy@hub.org> Cc: duane@greenmeadow.ca, freebsd-questions@freebsd.org Subject: Re: OT - Scalable email server solution needed 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>
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"Marc G. Fournier" <scrappy@hub.org> 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
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