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RE: [Xen-users] Why HVM?

To: "Felix Kuperjans" <felix@xxxxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Why HVM?
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 27 Aug 2010 20:43:01 +1000
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Thread-topic: [Xen-users] Why HVM?
> Hi Jonathan,
> The only big advantage is that customers can install operating systems
that do
> not support pv operation (e.g. Windows). Some small advantages like
using own
> GRUB or kernels can be achieved in pv environment, too (pvgrub,
pygrub), but
> those hosters probably don't enable that for pv VPS.
> Another little point is that not all HVM features are available for pv
> especially with pv_ops guest and host kernels (for example: USB
> PCI / VGA passthrough; the first two not yet with pv_ops kernels, VGA
> passthrough is always only available for HVMs). But as long as you
don't want
> to offer physical hardware to your clients, this doesn't matter for
> hosting.
> Probably I missed an important point, but AFAIK there is no advantage
> having a Linux server system in a HVM instead of a PV VM.

How good is VNC access under PV these days? With HVM you get a virtual
keyboard, video, and mouse which can get you out of trouble if you do
something dumb and lose network access.


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