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Re: [libvirt] [PATCH] Fix virsh sched-credit for xend

On Mon, Jan 26, 2009 at 01:21:46PM +0000, John Levon wrote:
> On Mon, Jan 26, 2009 at 12:28:47PM +0000, Richard W.M. Jones wrote:
> > > No, surely we should fix the XML to represent it, and then it /would/
> > > work. Must be better than another identical API.
> > 
> > Historically there has been a bit of a debate about this.  It's not
> > clear if the XML is meant to represent static configuration about the
> > domain (eg. what disks it has), versus administration of the domain
> > (how vCPUs are pinned for example).
> I think it's become evident that the XML represents the dynamic state of
> the domain - for example, the whole code is structured around things
> like the console pty being available. This would include administrative
> actions, especially ones that should be persisted.
> Put another way, there's nowhere else for it to go!
> Yes, it would have been nice for a clear separation between the three
> things (hypervisor-agnostic description of a guest 'profile', i.e.
> image.rng, configuration of a domain, and runtime state of a domain),
> but it cannot be changed now. Furthermore, the API does not include the
> notion of persistence, sadly.

Yup, I totally agree with you.


Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.

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