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. -- Eero