On Thu, Apr 29, 2010 at 09:40:39PM +0300, Pasi Kärkkäinen wrote:
> On Thu, Apr 29, 2010 at 11:03:55AM -0700, Grant McWilliams wrote:
> > On Thu, Apr 29, 2010 at 9:53 AM, Pasi KÀrkkÀinen <[1]pasik@xxxxxx>
> > wrote:
> >
> > On Wed, Apr 21, 2010 at 11:42:31PM -0700, Grant McWilliams wrote:
> > > Â Â On Wed, Apr 21, 2010 at 7:26 PM, Jeff Sturm
> > <[1][2]jeff.sturm@xxxxxxxxxx>
> > >
> >
> > Do you have some benchmarks to prove KVM being faster than Xen HVM?
> >
> > Yes, I do. I've been gathering statistics for quite a while because I'm
> > writing a white paper on Linux Virtualization Performance.
> > I'll need to dig them up after I get back from work. The difference is
> > enough to sway the decision if someone was only going to virtualize
> > 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.
-- Pasi
>
> > >
> > > Â Â Here's my thoughts.
> > > Â Â If I were primarily virtualizing Windows I'd use KVM.
> >
> > Why? Xen has both the GPLPV Windows drivers, and the binary WHQL Citrix
> > Windows
> > PV drivers available today.
> >
> > You'd think wouldn't you? I don't think it has to do with two drivers.
> >
>
> What are the reasons then? ;)
>
>
> >
> > > Â Â If I were primarily virtualizing Linux I'd use Xen.
> > > Â Â If I was using a bunch of old 3.4 Ghz Dual Core Xeons (I am) I'd
> > use Xen.
> > > Â Â If I was wanting to nest VMs I'd use AMD CPUs and KVM (for now).
> > >
> >
> > Xen also now has patches to supported Nested virtualization on both
> > Intel and AMD.
> > I bet this will end up in the Xen 4.1 development tree in upcoming
> > weeks.
> >
> > I will be looking forward to this indeed. I don't want to change my
> > platform just because I need one thing.
> > How is it going to support nesting on Intel? I was under the impression
> > that AMD was the one that supported
> > this in hardware.
>
> See the patches posted to xen-devel last week by Intel.
>
>
> >
> > > Â Â If I wanted the most pain free path to keeping my hypervisor
> > updated I'd
> > > Â Â use KVM.
> > > Â Â If I was doing desktop virtualization (local login, not network
> > logins)
> > > Â Â I'd use KVM or VirtualBox
> > > Â Â If I wanted the most tried and true enterprise hypervisor out
> > there and
> > > Â Â didn't want to use VMWARE then I'd use Xen. Citrix Xenserver,
> > VirtualIron,
> > > Â Â Sun SVM (one flavor), Oracle Virtual Machine and Amazon EC2 are
> > all based
> > > Â Â on Xen.
> > > Â Â It might look like I lean toward KVM from this list but I still
> > prefer Xen
> > > Â Â in most cases because of category 2.
> > >
> >
> > There are a lot of options for Xen dom0 kernel nowadays.. although
> > extra
> > patching
> > or fetching the git tree is still needed.
> >
> > Lots of options? You mean like compiling your own kernel? Pain free means
> > running your distribution the way it came. I predict in the coming years
> > we'll have two options - running XCP or running XenServer. I'm not sure
> > how well either put out security patches.
> >
>
> Yeah, XCP or XenServer is an easy solution if you don't want to buid your
> own platform.
>
> -- Pasi
>
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
Home