Backing a Nextcloud LXC with some data stored

[sysrq]

Hi,

I was recently got my hands on a barracuda back-up server 390 with 2x 2 tb enterprise hdds for a cheap price. I decided to replace the barracuda os with a proxmox back up server os for backing up my proxmox cluster to an independent storage. Everything went smooth, my question would be:
For example, my nextcloud lxc was backed on the PBS with ~24 GB, my files alone on Nextcloud are 70+ GB. From what i was reading this seems to be normal behaviour, something about deduplication and compression. But still, 3 times less space than the actual size sounds too good to be true. There is a chance that my cloud data wouldn t be backed up, just the LXC?

Thank you!

 

[bl1mp]

Hi sysrq,

the deduplication rate depends on various aspects e.g.
if the backuped data was compress before like in the jpg-format or not like textfiles.

To ensure, you have catched all necessary data, try a restore test.

In the view of a PVE Datastore,
- select Backups (if they are enabled for that store)
- select a backup image for the restore.
- than use the "Restore"-Button.
- In the Dialog you can choose a deviating VM-ID to restore it as another guest.
- Ensure you disable the network for the new guest.
- Afterwards you can login via the Webui, by selecting the new VM and choose Console
- and check if the restore works as smoothly as expected.


----
As extension of the 3-2-1 rule for backups, there is the 3-2-1-1-0 Strategy
3 Data copies
2 diffrent media (at least)
1 of that offline
1 that is offsite
0 errors in restore test (conducted on a regular base)

----
To rephrase "No Backup, No Mercy" ... nobody needs backups in an emergency, but successful restores might help.

BR, Lucas

 

[sysrq]

Ok, i will try that for my peace of mind. Thank you for your response!

 

[bl1mp]

You are welcome