On Fri, Sep 29, 2006 at 03:07:56PM -0400, Nicholas Wheeler wrote:
> Think of xen as running OSes "side-by-side", with one OS more equal than the
> other. Then think of vmware as a heirarchy, with your guest OS's resources
> way below that of your master OS. Xen will obviously allow the two OSes to
> have more equal access to the hardware resources, and won't provide a
> virtualization-bottleneck that is seen with vmware. Once the technologies
> develop, I'm pretty sure Xen (or xen-like programs) are the future. The good
> thing about VMWare though, is if an image of your server works under VMWare
> on one computer, it'll work on VMWare on any computer, whereas your server
> under Xen will need to support the actual hardware (with drivers, etc), just
> as much as your master OS has to.

With VMWare and VMotion, I can understand the idea of how you can walk
up to your rack, rip the cables out of a machine, and have the virtual
machines be seamlessly moved to other machines.  How does that work with
Xen, if it's a "side by side" thing?  How does Xen interact across
hardware, rather than on it?

-- 
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* John Oliver                             http://www.john-oliver.net/ *
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