Hello Stefan,
here I have the logs from two different hosts, each backed up with v3 and v4. Unfortunately, both hosts have been set up in BackupPC for a while, so they are not completely fresh backups. However, I don't think that should make a difference. You can see that despite identical numbers of files, the backups have significant differences in size.
Identical number of files != same files
v3 2022-12-12 10:15:15 full backup started for directory / (baseline backup #4521) 2022-12-12 10:17:31 full backup 4522 complete, 75368 files, 4031524511 bytes, 1 xferErrs (0 bad files, 0 bad shares, 1 other) Remote[2]: file has vanished: "/var/spool/exim4/input/1p4eu4-0002rf-1f-D"
[...]
Remote[2]: file has vanished: "/mnt/system/tmp/cron-apt.klojST/initlog" Remote[2]: file has vanished: "/tmp/cron-apt.klojST/initlog"
Since you're backing up temporary and ephemeral files as well, besides the ones that you could actually use, it's very possible that you get some files that are changing allot in size within no time.
Archived logfiles can change from many GBs to just a handful of bytes whenever logrotate steps in...
Look after /var/log/messages* for example and compare the sizes you see with the two types of backups.
Just a thought: backups are _not_ like snapshots, if you think about catching a particular (and reproducible...) state of your machine.
Best regards, Ioisf Fettich _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: https://github.com/backuppc/backuppc/wiki Project: https://backuppc.github.io/backuppc/
