For my rsync backup scripts, I always sync into a common directory.
This way I'm only moving files that have changed, and only need 1X the
storage space of what is being backed up. For "daily" backups, I then
tar/zip that working file into a date stamped file/directory (just the
day name via the "date" command, when I'm aiming for one week backup).
The compressed files don't require as much space, but do eat up a fair
chunk. Drives are cheap though.
Shawn
On 11-07-26 09:19 AM, Hendrik Schaink wrote:
For incremental rsync backups you need to use the rsync option "-u"
rsync -auv<source> <dest>
The _u_ directive. i.e. update, skips any files that are already stored
at the destination.
However, reading form your script, you create an empty directory every
time to back up your files. Therefore, the script looks like it will not
ever perform an incremental backup.
One more note: take great care with adding or omitting the "/" at the
end of source and destination paths. I recommend you try out a variation
of rsync commands with the --dry-run option to see what would happen
without really doing it. Once you find the combination of options you
want, simply drop the --dry-run option and you're off to production backup.
Hope that helps.
Hendrik
Joe S 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/*
- /*
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