Re: [Devel] Re: [RFC] Virtualization steps

[Matt Ayres]

Eric W. Biederman wrote:
> Matt Ayres <matta@xxxxxxxxxxxx> writes:
>
> > I think the Xen guys would disagree with you on this.  Xen claims <3% overhead
> > on the XenSource site.
> >
> > Where did you get these figures from?  What Xen version did you test? What was
> > your configuration? Did you have kernel debugging enabled? You can't just post
> > numbers without the data to back it up, especially when it conflicts greatly
> > with the Xen developers statements.  AFAIK Xen is well on it's way to inclusion
> > into the mainstream kernel.
>
> It doesn't matter.  The proof that Xen has more overhead is trivial
> Xen does more, and Xen clients don't share resources well.

I understand the difference. It was more about Kirill grabbing numbers 
out of the air.  I actually think the containers and Xen complement each 
other very well.  As Xen is now based on 2.6.16 (as are both VServer and 
OVZ) it makes sense to run a few Xen domains that then in turn run 
containers in some scenarios.  As far as the last part, Xen doesn't 
share resources at all :)

Thank you,
Matt Ayres
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