Hello,
I'm new to PBS, just installed the 4.0.1 version and while I don't face issues with backups of PVE vms, when trying to do a host backup using metadata as change detection-mode, it ends up with a full backup everytime.
Initial backup
root@Droopy:/volume2/Homedir/shared# proxmox-backup-client backup Photos.pxar:./Mes_Photos --change-detection-mode=metadata
Starting backup: host/Droopy/2025-09-04T06:42:13Z
Client name: Droopy
Starting backup protocol: Thu Sep 4 08:42:13 2025
storing login ticket failed: $XDG_RUNTIME_DIR must be set
Downloading previous manifest (Wed Sep 3 17:01:43 2025)
Upload directory './Mes_Photos' to 'backup@pbs@tape.xxxx.be:8007:Backup_pool' as Photos.mpxar.didx
resource limit for open file handles low: 4096
Previous manifest does not contain an archive called 'Photos.mpxar.didx', skipping download..
Previous manifest does not contain an archive called 'Photos.ppxar.didx', skipping download..
processed 4.927 GiB in 1m, uploaded 821.229 MiB
...
processed 411.977 GiB in 4h 4m 0s, uploaded 371.59 GiB
Photos.mpxar: had to backup 67.219 MiB of 67.219 MiB (compressed 14.968 MiB) in 14658.72 s (average 4.695 KiB/s)
Photos.ppxar: had to backup 371.806 GiB of 412.267 GiB (compressed 369.822 GiB) in 14658.99 s (average 25.972 MiB/s)
Photos.ppxar: backup was done incrementally, reused 40.461 GiB (9.8%)
Duration: 14660.70s
End Time: Thu Sep 4 12:46:34 2025
Subsequent backups:
root@Droopy:/volume2/Homedir/shared# proxmox-backup-client backup Photos.pxar:./Mes_Photos/ --change-detection-mode=metadata
Starting backup: host/Droopy/2025-09-04T11:46:04Z
Client name: Droopy
Starting backup protocol: Thu Sep 4 13:46:04 2025
storing login ticket failed: $XDG_RUNTIME_DIR must be set
Downloading previous manifest (Thu Sep 4 08:42:13 2025)
Upload directory './Mes_Photos/' to 'backup@pbs@xxxx.be:8007:Backup_pool' as Photos.mpxar.didx
No previous metadata index, continue without reference
resource limit for open file handles low: 4096
Error downloading .didx from previous manifest: Is a directory (os error 21)
Error downloading .didx from previous manifest: Is a directory (os error 21)
then it continues backuping everything again.
I'm using the latest version of the static client. Please note that I'm running it on a Synology NAS (and therefore btrfs filesystem).
Any idea on what I'm missing to have the incremental backup running as expected ?
Thanks for your help
Fred.
I'm new to PBS, just installed the 4.0.1 version and while I don't face issues with backups of PVE vms, when trying to do a host backup using metadata as change detection-mode, it ends up with a full backup everytime.
Initial backup
root@Droopy:/volume2/Homedir/shared# proxmox-backup-client backup Photos.pxar:./Mes_Photos --change-detection-mode=metadata
Starting backup: host/Droopy/2025-09-04T06:42:13Z
Client name: Droopy
Starting backup protocol: Thu Sep 4 08:42:13 2025
storing login ticket failed: $XDG_RUNTIME_DIR must be set
Downloading previous manifest (Wed Sep 3 17:01:43 2025)
Upload directory './Mes_Photos' to 'backup@pbs@tape.xxxx.be:8007:Backup_pool' as Photos.mpxar.didx
resource limit for open file handles low: 4096
Previous manifest does not contain an archive called 'Photos.mpxar.didx', skipping download..
Previous manifest does not contain an archive called 'Photos.ppxar.didx', skipping download..
processed 4.927 GiB in 1m, uploaded 821.229 MiB
...
processed 411.977 GiB in 4h 4m 0s, uploaded 371.59 GiB
Photos.mpxar: had to backup 67.219 MiB of 67.219 MiB (compressed 14.968 MiB) in 14658.72 s (average 4.695 KiB/s)
Photos.ppxar: had to backup 371.806 GiB of 412.267 GiB (compressed 369.822 GiB) in 14658.99 s (average 25.972 MiB/s)
Photos.ppxar: backup was done incrementally, reused 40.461 GiB (9.8%)
Duration: 14660.70s
End Time: Thu Sep 4 12:46:34 2025
Subsequent backups:
root@Droopy:/volume2/Homedir/shared# proxmox-backup-client backup Photos.pxar:./Mes_Photos/ --change-detection-mode=metadata
Starting backup: host/Droopy/2025-09-04T11:46:04Z
Client name: Droopy
Starting backup protocol: Thu Sep 4 13:46:04 2025
storing login ticket failed: $XDG_RUNTIME_DIR must be set
Downloading previous manifest (Thu Sep 4 08:42:13 2025)
Upload directory './Mes_Photos/' to 'backup@pbs@xxxx.be:8007:Backup_pool' as Photos.mpxar.didx
No previous metadata index, continue without reference
resource limit for open file handles low: 4096
Error downloading .didx from previous manifest: Is a directory (os error 21)
Error downloading .didx from previous manifest: Is a directory (os error 21)
then it continues backuping everything again.
I'm using the latest version of the static client. Please note that I'm running it on a Synology NAS (and therefore btrfs filesystem).
Any idea on what I'm missing to have the incremental backup running as expected ?
Thanks for your help
Fred.