[PVE-User] Analysis of free space...

[Gilou]

Le 17/09/2025 à 15:27, Marco Gaiarin a écrit :
> 
> We have an PVE8 server, on clustered, with 66TB of disk storage and (for
> now) a single VM; volumes have all 'discard' option enabled, and the VM
> (RH8) support and have trim enabled.
> 
> We moved around some data between volumes, and now we have 20TB used in the
> VM, and 56TB used on the zfs pool that host that volumes.
> 
> Clearly we have done some manual 'trim' to be sure, but nothing changed (or,
> better, some space get reclaimed but not what we expect).
> 
> 
> There's some tool/methodology to find where data get stuck, and how?
Hi,

What's the underlying storage? local zfs?
Does it have thin provisioning / sparse enabled?

You can check that forum post: 
https://forum.proxmox.com/threads/zfs-enable-thin-provisioning.41549/

Also inside the VM, make sure that all the stack is discard aware, LVM, 
filesystem and all..

Regards,
Gilou