how to discard a large VM disk

[leeyoo]

once i create the virtual hard disk didn't choose discard
now i feel it will take too larg vollume for me
any command can reduce/ discard the raw file size?
method in this page https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files
difficult to follow since VM disks already use 95% of my real HDD volume

and... can i use ZFS for ISO imag?

 

[Dunuin]

and... can i use ZFS for ISO imag?

Only when manually creating a dataset and creating a new directory storage pointing to the mountpoint of that dataset.

 

[leeyoo]

Only when manually creating a dataset and creating a new directory storage pointing to the mountpoint of that dataset.

THX， will mk a dir in that one

 

[leeyoo]

for zvol
can use

zfs get volsize

to check hows size taking
change pve VM hardware--Hardisk discard on
then, set large size zvol

zfs set refreservation=none ZFS/vm-101-disk-1

take a snapshot

zfs snapshot ZFS/vm-101-disk-1@rec

you may see the vol changed from fix size to dynamic size
will make your vm disk become dynamic