[CentOS] Backup solution to backup /var/spool/imap above 150GB data

Agnello George agnello.dsouza at gmail.com
Wed Feb 24 11:36:08 UTC 2010


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
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