[THIN] Re: quick question on virtualization platforms

The difference has to do with the XEN/Hyper-V using more direct hardware
support that was co-developed by INTEL, XEN and other many industry
heavyweights (i.e. VT) and the way the VM communicates to the host. The
Domain 0 machine concept provides better performance in communication
between the virtual machine and host physical resources (i.e.
paravirtualization, not software emulation). VMWare uses software
abstraction of instruction set commands to the processor and I/O subsystems
that works well but is significantly less efficient forcing software to
intercept, cache and interrupt hardware functions whereas those same
functions in paravirtualization talk directly to the processor system.

VMware has the edge on management tools and advanced features and we
recommend it when those features are important to the project. However, most
of our clients find that the XEN Features are sufficient so I have been a
bit surprised at how many have chosen XEN over VMWare lately...

Steve Greenberg
Thin Client Computing
34522 N. Scottsdale Rd D8453
Scottsdale, AZ 85266
(602) 432-8649
www.thinclient.net
steveg@thinclient.net

-----Original Message-----
From: thin-bounce@freelists.org [mailto:thin-bounce@freelists.org] On Behalf
Of Robert K Coffman Jr. -Info From Data Corp.
Sent: Tuesday, September 09, 2008 11:13 AM
To: thin@freelists.org
Subject: [THIN] Re: quick question on virtualization platforms

> MS and Citrix have the advantage of a better architecture with
para-virtualization

Steve,

What leads you to believe that paravirtualization is better than full? Not
arguing, in fact I never really put a lot of thought into it.

I think both have positives & negatives.

- Bob Coffman

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