On Thu, May 13, 2010 at 06:57:46AM -0700, Grant McWilliams wrote:
> On Thu, May 13, 2010 at 5:49 AM, Pasi KÀrkkÀinen <[1]pasik@xxxxxx>
> wrote:
>
> On Thu, Apr 29, 2010 at 09:40:39PM +0300, Pasi KÀrkkÀinen wrote:
> > On Thu, Apr 29, 2010 at 11:03:55AM -0700, Grant McWilliams wrote:
> > > Â Â On Thu, Apr 29, 2010 at 9:53 AM, Pasi KÃ*â*¬rkkÃ*â*¬inen
> <[1][2]pasik@xxxxxx>
> > > Â Â wrote:
> > >
> > > Â Â Â On Wed, Apr 21, 2010 at 11:42:31PM -0700, Grant McWilliams
> wrote:
> > > Â Â Â > Ã* Â Ã* On Wed, Apr 21, 2010 at 7:26 PM, Jeff Sturm
> > > Â Â Â <[1][2][3]jeff.sturm@xxxxxxxxxx>
> > > Â Â Â >
> > >
> > > Â Â Â Do you have some benchmarks to prove KVM being faster than
> Xen HVM?
> > >
> > > Â Â Yes, I do. I've been gathering statistics for quite a while
> because I'm
> > > Â Â writing a white paper on Linux Virtualization Performance.
> > > Â Â I'll need to dig them up after I get back from work. The
> difference is
> > > Â Â enough to sway the decision if someone was only going to
> virtualize
> > > Â Â Windows. If someone were to just use PV though Xen wins hands
> down.
> > >
> >
> > I'm really surprised if there is a big difference between Xen HVM vs.
> KVM.
> >
> > What software versions did you use?
> > What kind of hardware?
> >
> > I'm sure Citrix Xen guys want to see the results and comment if
> there's something to tweak :)
> >
>
> Replying to myself..
>
> Grant: I'm not sure if you replied to this.. I had some trouble with my
> email provider
> getting blacklisted because of some spam problems.
>
> My last response was this... I'm working 110 hrs a week and teaching two
> college classes. I'll get back to this topic!
>
Ok. No problems, take your time :)
> For now. I predict (and you can quote me) that Xen Dom0 will be removed in
> all big distros in time.
> Mind you I don't want this because I use it exclusively for my server
> virtualization needs. The reason
> for this is if KVM provides 95% of what Xen does and is already included
> and it's easy for the packagers
> to maintain then everyone will move to it. Every year at LinuxFest NW I
> hear the Redhat people complaining about
> how hard it is to get the Xen patches to work on newer kernels. As of
> RHEL6 those complaints have gone away because
> Xen Dom0 support is gone. Suse would probably like to stop doing the work
> they're doing as well. By the time
> Xen Dom0 will be in the mainline kernel nobody will care anymore.
>
See:
http://blog.xen.org/index.php/2010/05/07/xen-%E2%80%93-kvm-linux-%E2%80%93-and-the-community/
> I think a shift in mentality is in order. We're not trying to get VMware
> ESX in the kernel, if we want to use it we download
> the CD and install it. I think this is where Xen will end up. XCP and
> XenServer are already there.
>
Yeah, hypervisors are already commodity, so people will focus more on
high-level stuff.
Building a virtualization platform on Xen is not a problem for
virtualization-vendor,
since they can choose from the available kernels (and actually there are a lot
of options today),
but it might be a problem (atm) for a Linux vendor, who just wants to use the
'upstream' stuff only.
And when talking about Redhat we have to remember they bought KVM for $105M USD
or so..
-- Pasi
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