Proxmox Backup Server - free system disk space

[cpulove]

Hi, I am using two Proxmox Backup Servers, one on my Online Server and one in my Homelab.
I see now, that the online PBS has a much larger used space on /dev/mapper/pbs-root compared to the Homlab PBS.
First uses 13G, second only 3.6G.

Filesystem            Size  Used Avail Use% Mounted on
udev                  7.8G     0  7.8G   0% /dev
tmpfs                 1.6G  760K  1.6G   1% /run
/dev/mapper/pbs-root   19G   13G  5.0G  72% /
tmpfs                 7.9G     0  7.9G   0% /dev/shm
tmpfs                 5.0M     0  5.0M   0% /run/lock
/dev/sdb1             9.7T  2.8T  6.5T  30% /mnt/datastore/pve-backups
tmpfs                 1.6G     0  1.6G   0% /run/user/0

Filesystem                                         Size  Used Avail Use% Mounted on
udev                                               3.9G     0  3.9G   0% /dev
tmpfs                                              795M  1.0M  794M   1% /run
/dev/mapper/pbs-root                                19G  3.6G   14G  21% /
tmpfs                                              3.9G     0  3.9G   0% /dev/shm
tmpfs                                              5.0M     0  5.0M   0% /run/lock
192.168.71.165:/mnt/pool1/Backup/pve_backups_epyc   16T  4.1T   12T  26% /mnt/pve_backups_epyc
tmpfs                                              795M     0  795M   0% /run/user/0

I already cleaned both versions from older Kernels, but was so far not able to find, what causes this discrepancies.

It might be an old local mountpoint where accidentally a backup was written to the system disk.
But I could not find it so far.

Any Idea how to find out, what takes so much more space on the online PBS compared to my other Homelab Server?

 

[Impact]

Please try this to investigate the used storage

apt install gdu
gdu -x /

If you cannot find it with the tool above it could, as you said, be caused by a previous failed mount. In this case unmount the share and then run it again.

 

[cpulove]

Please try this to investigate the used storage

apt install gdu
gdu -x /

If you cannot fint it with the tool above it could, as you said, be caused by a previous failed mount. In this case unmount the share and then run it again.

Thanks, that helped a lot, rather then only searching by terminal!

I found the culprit: /var/log/proxmox-backup/tasks

I guess I can delete everything in there, as this is only the log?


Seems there is no way to look at the logs, or delete them directly from the PBS interface, right?
Is there maybe a proper way to reduce the Loglevel or Log-Retention time?
Lets say delete everything older then 60 days or so?

 

[Impact]

I'd recommend reading this thread which should answer most of the questions. As always, be careful when deleting things.
To view the task history check Administration > Tasks.