On Fri 24 Apr 2020 08:15:04 PM CEST, Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> wrote: > AFAIK, now compressed clusters can't be used in scenarios with guest, > as qcow2 driver doesn't support rewriting them.
You can write to those images just fine, it's just not efficient because you have to COW the compressed clusters. > Or am I wrong? And we normally don't combine normal and compressed > clusters together in one image. As soon as you start writing to an image with compressed clusters you'll have a combination of both. But it's true that you don't have an image with compressed clusters if what you're looking for is performance. So I wouldn't add support for this if it complicates things too much. Berto