On Mon, Jul 23, 2012 at 10:55:36AM +0100, Daniel P. Berrange wrote: > On Sun, Jul 22, 2012 at 09:43:04AM +0100, Richard W.M. Jones wrote: > > On Sat, Jul 21, 2012 at 08:20:45PM +0100, Richard W.M. Jones wrote: > > > This preliminary patch series adds a libvirt backend to libguestfs. > > > It's for review only because although it launches the guest OK, there > > > are some missing features that need to be implemented. > > > > I did some appliance boot timings of libvirt vs direct qemu boot from > > libguestfs, and essentially libvirt makes no measurable difference, > > which is all good news. > > Oh, I'm a little surprised at that. When I switched my KVM > sandbox hacks from a quick proof of concept, over to using > libvirt, I saw about a 300-500ms overhead from libvirt in > the startup process. My presumption is that this overhead > is primarily from libvirt invoking qemu -help several times > to figure out supported options. When we switch to caching > that info though, I'd expect there to be little measurable > impact from libvirt libguestfs also runs 'qemu -help', so I guess there is no difference there :-) Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list