On Mon, 2009-06-22 at 10:50 +0100, Daniel P. Berrange wrote:
libvirt does not require that all functionality is present on all platforms. So as long as an error is raised if the user requests an unsupported configuration, we're fine. As for the XML question, libvirt requires 100% backwards compatability so its XML format is essentially "append" only, existing features cannot be dropped/changed.
This is also the intent for netcf's XML (warning: neither the XML format nor the API can be considered stable yet, but I hope that we get to that point very soon) As for backend differences, we definitely need to address them on a case-by-case basis, weighing the headache of dealing with different backends with different feature sets against the importance of that feature. David