On Wed, Feb 24, 2010 at 4:13 PM, Gavin Carr <gavin at openfusion.com.au> wrote: > On Wed, Feb 24, 2010 at 10:38:32AM +0100, David Hrbáč wrote: > > Dne 24.2.2010 10:00, Agnello George napsal(a): > > > We have an issue with one of our clients , they have a mail server > with > > > the /var/spool/imap partition as 150 GB . They need to take > differential > > > backup on to /backup partition ( a different HDD of total 250 GB space > ) . > > > We have tried dar , rsync, rdiff and impasync . But its is not > sufficing the > > > need as to take a lot of time and consumes a lot of I/O . > > > > > > Is there any back up solution that you can think of , that can work in > this > > > situation - open source or proprietary > > > > Is seems to me, that you are using mbox format. So, differential backup > > is hard to achieve. Migrate to maildir, every mail is a file, easy to > > backup differentially. > > rsync and rdiff should handle mbox format okay though. Though I agree > Maildir > is generally nicer for differential backups. > > Agnello, how long is "a lot of time"? A backup is always going to have to > walk > the entire tree and checksum (or at least stat) every file, so there's a > minimum > cost you're always going to have. How long does a 'find /var/spool/imap > -ls' > take, for instance? > > You might want to try brackup (http://code.google.com/p/brackup/). For > very > large trees of relatively small files it seems to significantly out-perform > rsync-based backups. I've got brackup packages in my repository (see > http://www.openfusion.net/linux/openfusion_rpm_repository). > > Cheers, > Gavin > > <http://lists.centos.org/mailman/listinfo/centos> > is it possible with " brackup " <http://code.google.com/p/brackup/> to back it up to a different server on the same lan instead of /backup . Is there any documentation on the same . -- Regards Agnello D'souza -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100224/939820f3/attachment-0005.html>