I am using ext3 for a filesystem. I used 'du -hs' to calculate the disk usage. Each of the backups: backup.1 through backup.7 are each 12G, but squeeze shows 17G. From from what I understand with the 'link-dest=DIR' option I have backup.0 linked to backup.1, so only changed or new files should copied over to backup.0 and the rest should be hard linked to backup.1. /etc, /root /boot /usr/local only take 50M and the files in /home/joe that I backup don't change much. I don't have any files in there that I have hard linked. I used this article to learn about the link-dest=DIR http://blog.interlinked.org/tutorials/rsync_time_machine.html
I didn't have trouble with incremental backups when I just backed up /home, but adding other directories: /etc/ /usr/local/ /root and /boot has changed things. On Monday 25 July 2011 11:52:07 pm Mark Carlson wrote: > 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 _______________________________________________ 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
