My UrBackup server is running on Linux Mint 19.2 kernel version 4.15.0-54 (/root and /home on 120 GB SSD, backup on mirrored btrfs 3 TB HDDs) backing up 5 Windows 10 clients. I not backing up system partitions on clients, just data partitions. Most of the files being backed up are in the 500 KB to 25 MB range.
During initial file and image backup server received around 1.05 TB of data which translated into roughly the same amount of used space on btrfs volume (info obtained with df command). Is this normal? There is significant number of identical files on different clients. Or do they count as different due to different file ownership and permissions?
During second file backup server received around nothing from 2 clients (this is ok I guess as there has been no user activity on them) an around 10 GB from remaining 3 clients. Now this is odd for two reasons. First, there was minimal user activity on them so no more than few files where changed/created. Second, this translated into additional 10 GB used on btrfs volume.
urbackup_snapshot_helper test passed
Am I doing something wrong here?