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