Update Catalogue file from diff files.

Hi everyone,

This is my first post so I hope I am doing it right...

I am using DAR to create a mirror of data from one data store to another. I only ever need to send the latest diff files across the network to the second store and because of this I have decided to use a catalogue and differential backups on the source. I want to minimise the space that DAR uses on the source system. My process is like this:

1. Take baseline backup of whole system
2. Generate catalogue file from baseline backup (then delete baseline backup)
3. Generate first differential backup from catalogue and source
	dar -c <diff-backup-name> -A <catalogue> -R <source>
4. Generate subsequent backups from differential files
	dar -c <diff-backup-name> -A <previous-diff-file> -R <source>

The issue is that the number of diff files that I need to retain on the source system seems to increase quite quickly.

My questions are:
1. Can I somehow add the meta data in the diff backups that are generated back to the catalogue so that I don't have to keep the relatively heavy diff files around?
2. Is what I am doing the right thing or perhaps there's an easier way?

Thanks a bunch!

Dan.