High ZFS disk usage in Proxmox

[simen]

Hello
I have installed Proxmox VE on a group of SSD disks raid-0.
My problem is that while copying a file to a VM, then deleting it, it won't reclaim disk space on local-zfs. However, while running "df -h" in VM command line, it shows amount of space less than real space in local-zfs.

 

[LnxBil]

That is normal. The file is not deleted, just not accessible by the OS. Just TRIM (if enabled) or overwrite the free space inside of your VM with zeros.

This is for QCOW2, but is also true for ZFS:
https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files

 

[simen]

That is normal. The file is not deleted, just not accessible by the OS. Just TRIM (if enabled) or overwrite the free space inside of your VM with zeros.

This is for QCOW2, but is also true for ZFS:
https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files

I have already enabled TRIM option inside my VMs, but nothing has changed.
Could you please tell me how to overwrite the free spaces with zeros?

 

[LnxBil]

Could you please tell me how to overwrite the free spaces with zeros?

Please read the aforementioned URL, everything is in there.

 

[sb-jw]

Run "fstrim -v /" and post the output here.