Hello all I having a problem not being able to get deduplication to work. I am running URbackup server 2.3.8 - debian 11 - btrfs - Images = “Raw copy-on-write-files”.
'urbackup_snapshot_helper test" - Successful
Tested the deduplication by backing up a image of a laptop. Once completed I uninstalled urbackup client, renamed client computer, rebooted (now with a new hostname) reinstalled urbackup client and let it do another backup image. When checking the space I have 2 full images of an identical machine. Can anyone help? What have i missed scouring the manual? Thank you
Here’s some output if it helps:
nstalled btrfs. Ran backup on client. Urbackup server showed this after image/file backup:
media/BACKUP/urbackup$ df -h
df: /run/user/1000/doc: Operation not permitted
Filesystem Size Used Avail Use% Mounted on
udev 1.7G 0 1.7G 0% /dev
tmpfs 336M 1.3M 335M 1% /run
/dev/sda1 928G 123G 805G 14% /
tmpfs 1.7G 0 1.7G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda1 928G 123G 805G 14% /home
tmpfs 336M 408K 335M 1% /run/user/1000
server@backup:/media/BACKUP/urbackup$ urbackup_snapshot_helper test
Testing for btrfs…
Create subvolume ‘/media/BACKUP/urbackup/testA54hj5luZtlorr494/A’
Create a snapshot of ‘/media/BACKUP/urbackup/testA54hj5luZtlorr494/A’ in ‘/media/BACKUP/urbackup/testA54hj5luZtlorr494/B’
Delete subvolume (commit): ‘/media/BACKUP/urbackup/testA54hj5luZtlorr494/A’
Delete subvolume (commit): ‘/media/BACKUP/urbackup/testA54hj5luZtlorr494/B’
BTRFS TEST OK
Then removed the urbackup client and renamed the client system hostname, rebooted and reinstalled urbackup client. Performed another image backup. Space is double as if no deduplication has occured. Here is the result.
/media/BACKUP/urbackup$ df -h
df: /run/user/1000/doc: Operation not permitted
Filesystem Size Used Avail Use% Mounted on
udev 1.7G 0 1.7G 0% /dev
tmpfs 336M 1.3M 335M 1% /run
/dev/sda1 928G 238G 690G 26% /
tmpfs 1.7G 0 1.7G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda1 928G 238G 690G 26% /home
tmpfs 336M 416K 335M 1% /run/user/1000