[PVE-User] ZFS Disk Usage unexpected high
mhill at inett.de
Tue Apr 6 09:41:26 CEST 2021
I got the same issue with different RAID-Z setups lately.
We worked around it, but I don't want to go into detail abaout that
before I know. why that happened.
On Mon, Apr 05, 2021 at 10:22:56AM +0200, Konold, Martin wrote:
> I set up a single VM which currently used 15TB of data.
> /dev/sdb is technically a ZFS volume on the Proxmox Host.
> [root at vm ~]# df -h /data
> Filesystem Size Used Avail Use% Mounted on
> /dev/sdb 40T 15T 25T 37% /data
> [root at vm ~]# du -s /data/
> 14874345100 /data/
> [root at host /]# zfs list zfs01/PVE-BE/vm-1-disk-1
> NAME USED AVAIL REFER MOUNTPOINT
> zfs01/PVE-BE/vm-1-disk-1 31.5T 5.82T 31.5T -
> Why is the usage on the host about twice as large as within the vm?
> (Yes, I have given fstrim and discard a try).
> ppa. Martin Konold
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