What filesystem and how many files do you have? Millions of hardlinks repeated 8 times would take up quite a bit of space.
Alternately, there may just be 5GB worth of changes made to files. Are you backing up any databases? Large compressed log files? Web browser cache? Software updates? I suppose the tool that is calculating disk usage may not be handling hard links in a useful way. How are you calculating the disk usage exactly? Are backup.1 through backup.7 all the same size or do they vary quite a bit? -Mark C. On Mon, Jul 25, 2011 at 7:27 PM, Joe S <[email protected]> wrote: > I have a question for someone with experience with rsync backups. > > I am using rsync for incremental backups. I am backing up from > one hard drive to another: backing up directories under / on one > hard drive to /mnt/backup/squeeze/backup.0 on the second hard > drive. On the second hard drive I am using rsync with the hard > link option (link-dest=) to link backup.0 to the previous backup > (backup.1). > > I checked the amount of space used on the backups on > /mnt/backup/squeeze/ > Each backup from backup.0 to backup.7 under squeeze is 12G. The > total for squeeze is 17G. All the backups are hard linked and I > am not making much for changes. Why am I adding 5G? > > Thanks > > Backup Script > #!/bin/bash > mount /mnt/backup > cd /mnt/backup/squeeze/ > rm -rf backup.7 > mv backup.6 backup.7 > mv backup.5 backup.6 > mv backup.4 backup.5 > mv backup.3 backup.4 > mv backup.2 backup.3 > mv backup.1 backup.2 > mv backup.0 backup.1 > cd / > rsync -am --delete-after --filter="merge /root/scripts/filter- > rule" --delete-excluded \ > --link-dest=/mnt/backup/squeeze/backup.1 \ > / /mnt/backup/squeeze/backup.0 > umount /mnt/backup > > > Filter rule: > - /home/joe/downloads/ > - /home/joe/.local/share/Trash/ > + /home/ > + /etc/ > + /root/ > + /boot/ > + /usr/ > + /usr/local/ > - /usr/* > - /* > > _______________________________________________ > clug-talk mailing list > [email protected] > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying > _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
