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Re: [Xen-users] how to install Windows without hardware support

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "Petro, Christopher C." <petro@xxxxxxxxx>
  • Date: Tue, 02 Oct 2007 23:22:55 -0700
  • Delivery-date: Tue, 02 Oct 2007 23:25:54 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Artur Baruchi wrote:

If you wanna virtualize your data center and dont have the VT tech,
you should use paravirtualization... remember that paravirtualization
has some advantages, like better IO.

When one is trying to "virtualize a data center" (aka server consolidation) one is *usually* talking about migrating pre-existing servers and services, often third party applications or "quantity one" in house applications. These are often written for *older* versions of operating systems, and often closed source OSes like Windows NT, 2000 and 2003, not to mention Solaris 7 through 9.

Paravirtualization is *not* possible in those environments, and the *first* thing medium sized companies would do when you called them for support of an app running on a non-standard kernel will be to blame the kernel.

So you either cough up the cash for a server that supports VT (and this winds up being a cost *savings* in the long run), or you use something like VMware Server and live with the less than desirable performance.

When you figure the cost of buying a new low to mid range server to replace 4 or 5 existing servers, with power, cooling and space reclaimation your ROI is pretty good.

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