Il giorno mar 27 nov 2018 alle ore 16:37 Joachim Wagner <jwagner@xxxxxxxxxxxxxxxx> ha scritto: > > > > > Moreover, I created a QCOW3 disk image. I asked for a maximum capacity > > > > of 6GB and initial allocation of 0GB (zero). > > > > I got a 6GB image file. Is this a bug or am I missing something? > > > > Any hint on this? > > With QCOW2 I used to get a 200KB file as initial image, no matter it's > > maximum size. > > Have you checked the space used on disk or the file size? Possibly, the > default on your system is to use sparse pre-allocation when supported by the > filesystem. You are right! The 'du' tool is showing that it's not eating 6GB but just 2. > Also, did you try preallocation=off or metadata (see man page)? I have used the GUI from virt-manager and chose a maximum allocation of 6GB and an initial allocation of 0GB. > How do you request qcow3? According to the edit history of https:// > wiki.qemu.org/Features/Qcow3 , qcow3 should be many years old but the manpage > of qemu-img on my current system does not mention qcow3. I didn't request it. The virt-manager let me chose qcow3 against raw. That's it. > > Joachim -- Vincenzo Romano - NotOrAnd.IT Information Technologies -- NON QVIETIS MARIBVS NAVTA PERITVS _______________________________________________ virt-tools-list mailing list virt-tools-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/virt-tools-list
