This is incorrect or at least incomplete... (Sorry Adam)
If you are talking about CP's performance, or even CMS' performance,
then yes, it's a minor performance hit.
If you are talking about your Linux guests under your VM under their VM
under LPAR, then it is a very substantial hit. Performance IPLing the
Linux guests is extremely slow (30-40 minute IPL), and once the guest
does come up, things like WebSphere sessions frequently time out before
they display a screen.... It is essentially unusable...
Either run your (few) Linux guests under their VM -- or run your VM in
their LPAR if you want to have your Linux guests perform acceptably...
Lee
Adam Thornton wrote:
You'll take a few percent hit, versus identical hardware, but the larger
difference is going to be the difference in hardware and load on the
machine at the DR site.
But seriously, being a VM user and *not* using a virtualized
second-level system for recovery is...silly.
It's a *DISASTER* you're talking about. Getting the system back
up--even running slower--is most of what counts. You can recreate a
faithful copy of your environment very, very easily using VM, and it's
very, very much harder on the metal. DR procedures should be as simple
as possible, because people are panicky during a disaster and there
shouldn't be much that CAN go wrong. In that case, VM and an identical
(even if second-level) environment is a clear win.
Adam
--
Lee Stewart, Senior SE
Sirius Computer Solutions
Phone: (303) 798-2954
Fax: (720) 228-2321
Email: [EMAIL PROTECTED]
Web: www.siriuscom.com
