On Wed, Feb 24, 2010 at 4:57 PM, Eero Volotinen <eero.volotinen at iki.fi>wrote: > 2010/2/24 Agnello George <agnello.dsouza at gmail.com>: > > > > > > 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 > >> > > is it possible with " brackup " to back it up to a different server on > the > > same lan instead of /backup . Is there any documentation on the same . > > rsync or rdiff-backup works on local disk or remote disk.(and other > backup methods too!) > Does http://code.google.com/p/brackup/ also work in on remote machines . -- Regards Agnello D'souza -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100224/1b5ef7d0/attachment-0005.html>