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...ion is very handy and much less error prone. As it is now, if using a fallocate-less filesystem (eg: ZFS) and *not* selecting to create a custom disk, you risk waiting minutes or hours for libvirt to fully allocate the image by writing 0s to the disk file. This can wreck havok on SSDs and other eundurance-limited medium. > qcow2 is the default for virt-manager because it enables features like > snapshots out of the box. The main motivation I have largely heard for > wanting raw over qcow2 is performance, but then using sparse raw > actually makes raw less performant, so it's kin...

...much less error > prone. > As it is now, if using a fallocate-less filesystem (eg: ZFS) and *not* > selecting to create a custom disk, you risk waiting minutes or hours for > libvirt to fully allocate the image by writing 0s to the disk file. This > can wreck havok on SSDs and other eundurance-limited medium. > >> qcow2 is the default for virt-manager because it enables features like >> snapshots out of the box. The main motivation I have largely heard for >> wanting raw over qcow2 is performance, but then using sparse raw >> actually makes raw less perfor...

Il 19-06-2018 20:14 Cole Robinson ha scritto: > If you change the disk image format from qcow2 to raw in > Edit->Preferences, then new disk images are set to fully allocated raw. > Check the image details with 'qemu-img info $filename' to confirm. So I > think by default we are doing what you want? > > - Cole Er, the point is that I would really like to have a