On Fri, 04 Feb 2005 00:14:25 +0000, Steve wrote: > >That's an issue with rsync, but not with rdiff-backup, which keeps > >older files. You can restore older versions of files, or deleted files > >for as long as they stay in the backup.
> I like being the less up-to-date - it is more interesting. :-) I've > rdiff-backup on my list of man-pages to read. I was fortunate enough to be paid to write a review of backup software recently. It forced me to put my house in order :) > >>For a mail server, I can't help thinking that the ideal solution would > >>be some (possibly bespoke) mechanism to push emails from the primary > >>server to a secondary server (or maybe just a secondary disk) as it > >>arrives (possibly with a queue as necessary) and not to delete data > >from >the secondary server when it is deleted from the first, but > >rather to >archive the eldest data regularly in order to ensure the > >disks do not >fill. This, however, could not be considered a simple > >backup by most. >[Neil - you'd impress me by naming a tool that would > >do this 'ideal >solution' without the need for writing bespoke > >scripts...] > > >> > > > >You can use a procmail rule to send a copy of a mail to a backup file. > > > >:0c: > >/mnt/backup/mail/$USER.backup > > > > > Of course, but (I ask provocatively) - won't that use mailbox rather > than maildir format -hence introducing complications of locking? The trailing colon forces procmail to use, and respect, file locks. it's probably possibly to do it in maildir instead, but I still use mailbox files here. Switching over is somewhere on my list of things to do. > there an issue in getting this to be a system wide setting not a > per-user thing? For a mail server with centralised administration - > isn't something closer to the MTA more appropriate? You could put a rule like this in the global procmail file. i'm sure there are better ways of doing it, especially on a medium to large scale setup, but it works for me. > [BTW - you didn't solve the archiving bit :-P ] OK, that is a (very short) "custom" script, that archives the backup files once a week. > That's good - people who agree with me are usually dull. :-) Should I agree or disagree with that? ;-) -- Neil Bothwick 667 - The FAX number of the beast
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