https://bugzilla.novell.com/show_bug.cgi?id=777387 https://bugzilla.novell.com/show_bug.cgi?id=777387#c0 Summary: virsh / virt-manager: lacking qcow2 image preallocation options Classification: openSUSE Product: openSUSE 12.2 Version: RC 2 Platform: All OS/Version: openSUSE 12.2 Status: NEW Severity: Normal Priority: P5 - None Component: Other AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: graham@andtech.eu QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1226.0 Safari/537.4 SUSE/22.0.1226.0 It is not currently possible to create a KVM volume in the qcow2 image format with full metadata preallocation via virt-manager GUI app or the virsh shell/command line. If I choose to manually create a qcow2 image, the option I would always pass (in combination with others) to qemu-image to avoid performance issues would be "preallocation=metadata". The option to create a qcow2 image with virsh or virt-manager with this option is simple not available. In practical terms, if you wish not to have very poorly performing disk IO in any KVM guest domain, you must choose a raw image format and something like an LVM storage pool. A directory based pool is not an option if you wish to also snapshot your guests. I believe this is an upstream limitation rather than one specifically in the openSUSE virsh/libvirtd packages. I have no upstream issue # at the moment as I'm still wading through libvirt ML backlog. Reproducible: Always Steps to Reproduce: 1. 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.