On Mon, Apr 5, 2021, 6:28 AM Richard Shaw <hobbes1069@gmail.com> wrote:

On Sun, Apr 4, 2021 at 5:19 PM Chris Murphy <lists@colorremedies.com> wrote:

On Sun, Apr 4, 2021 at 5:40 AM Richard Shaw <hobbes1069@gmail.com> wrote:

> It should be possible, however, to mark the images folder +C even if it wouldn't affect existing images.

It is.

What I meant, is that it could be marked +C even for existing installs so at least future VMs would be set correctly.

The nodatacow attribute/flag is set at the time the storage pool is created. I'm not sure what would be involved in checking it every time. There's an opt out mechanism in libvirt (keep it cow).