On Fri, 30 May 2025 09:26:12 +0100, Jonathan Dowland wrote: > On Thu May 29, 2025 at 3:20 PM BST, Celejar wrote: > >> I think I've successfully enabled TRIM/DISCARD in both the guest OS as >> well as the host libvirt configuration, and as I mentioned, I think I >> did claw back some space by doing so, but not nearly enough. > > Is 80G too big? If not, stop the VM, qemu-img convert -O raw in.img > out.img ; then either something like `mv in.img old.img; mv out.img > in.img` or edit your VM configuration to point at the new disk image.
Can you elaborate, please? Are you recommending that I just stop using qcow2 going forward and stick to raw? My understanding is that the former will generally be *more* space efficient, rather than *less* (in addition to providing additional functionality, such as snapshotting)? > Remove the old one once you are satisfied the new one is working. -- Celejar
