What filesystem to use for local backups?

[WillEndure]

Hi, Fairly new to Proxmox. Came from a Xen installation on LVM, and I set up my own backup scripts on that which would snapshot LVM volumes, then copy onto another physical disk on same machine, for the local backups. I always used LVM with non-thin volumes.

So I opted to stick with LVM for my Proxmox setup, since I already know it.

I have read that LVM-thin can be prone to failures if a machine is terminated suddenly. Maybe its something to do with the way meta-data is held separately in a thin-pool disk layout.

Anyway, since Proxmox set up an initial LVM thin-pool, I have stuck with using a thin-pool to hold my VMs.

My question is, should I back up also to a thin-pool on a separate physical device? Or use non-thin LVM volumes on separate physical device to hold the backups?

 

[fba]

Hi,
Proxmox has a built-in possibility for making backups, which I suggest is the way to go. Jobs for creating backups automatically can be defined via gui. For single vm/ct backups cli tool vzdump can be used. It is up to you. More details can be found in the docs: https://pve.proxmox.com/pve-docs/chapter-vzdump.html
What the PVE must know is a target storage, which allows storing backups. LVM and LVM-Thin are not counted as compatible target storages, but e. g. simple Directory is.

 

[WillEndure]

Thanks. I see that directory is the only option when not using Proxmox Backup Server.

I will create a non-thin LVM volume on my backup disks and store in a directory within that.