Hi. Sorry to reply to my own post, but I guess I need to follow up with a simpler question.
Is anyone here running a VM with libvirt, KVM, a raw LVM disk and has it set up with type='block' and target bus='virtio' ? On Tue, Mar 5, 2013 at 12:51 PM, Jeff Dickens <[email protected]> wrote: > > > -- > Hi. I'm running > Ubuntu Precise > 12.04 LTS. I created some virtual machines using vmbuilder, and then > migrated those from their .qcow files to lvm. However, those virtual > machines are still using disk type "file": > Code: > > <disk type='file' device='disk'> > <driver name='qemu' type='raw'/> > <source file='/dev/vg1/lvname'/> > <target dev='hda' bus='ide'/> > <alias name='ide0-0-0'/> > <address type='drive' controller='0' bus='0' unit='0'/> > </disk> > > Now I've noticed that this disk should probably have type "block" - using > this is supposed to provide superior performance. It would also make > Berteaud's virt-backup script happy and willing to snapshot the lvm making > the backup very quick. So I tried setting up the disk like this: > > Code: > > <disk type='block' device='disk'> > <driver name='qemu' type='raw'/> > <source dev='/dev/vg1/lvname'/> > <target dev='vda' bus='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' > function='0x0'/> > </disk> > > I had to edit fstab to look for the disk on vda instead of hda but it came > up. However performance was terrible. It seemed like it was going to lock > up, although it never did. > > So my question > is: > > *How should I be setting up my LVM-based virtual machines to use virtio > block devices ?* > > > IT Manager 978-632-1513 > > -- * Jeff Dickens* IT Manager 978-632-1513
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