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

Agnello George agnello.dsouza at gmail.com
Wed Feb 24 11:21:35 UTC 2010


2010/2/24 Eero Volotinen <eero.volotinen at iki.fi>

> 2010/2/24 Agnello George <agnello.dsouza at gmail.com>:
> >
> >
> > On Wed, Feb 24, 2010 at 3:08 PM, David Hrbáč <hrbac.conf at seznam.cz>
> wrote:
> >>
> >> Dne 24.2.2010 10:00, Agnello George napsal(a):
> >> > Hi
> >> >
> >> > 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.
> >> David
> >
> > backup directory structure is /var/spool/imap/a
> > /adomain.com/a/agnello^dsouza/
> >
>
> Well, does that directory contains one file or lot of files ?
>
> Usually maildir structure is like dir++/tmp/current/new directories
> and each message is in own file on mailbox all files are inside one
> file.
>
> its in a maildir format and the structure slightly   different from what i
mentioned earlier :
root at server1 ~]# ls -la /var/spool/imap/a/user/ajay/
total 5180
-rw------- 1 cyrus mail 34616 Feb 24 16:02 4790.
-rw------- 1 cyrus mail 4490 Feb 24 16:03 4791.
-rw------- 1 cyrus mail 199253 Feb 24 16:07 4792.
-rw------- 1 cyrus mail 22930 Feb 24 16:09 4793.
-rw------- 1 cyrus mail 8485 Feb 24 16:11 4794.
-rw------- 1 cyrus mail 12664 Feb 24 16:13 4795.
-rw------- 1 cyrus mail 4296 Feb 24 16:13 4796.
-rw------- 1 cyrus mail 5337 Feb 24 16:15 4797.
-rw------- 1 cyrus mail 111030 Feb 24 16:21 4798.
-rw------- 1 cyrus mail 4805500 Feb 24 16:23 4799.
-rw------- 1 cyrus mail 22920 Feb 24 16:23 cyrus.cache
-rw------- 1 cyrus mail 204 Dec 10 16:27 cyrus.header
-rw------- 1 cyrus mail 896 Feb 24 16:23 cyrus.index
-rw------- 1 cyrus mail 8669 Feb 24 11:28 cyrus.squat

this is Just a very small user and a example



-- 
Regards
Agnello D'souza
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