Nathan Andelin wrote on Sat, 08 Sep 2012 21:28:52 GMT:

Some references suggest that a "guest" runs under the primary
operating system, such as Linux running under a Windows VM.
Windows is the "host", while Linux is the "guest". ÿIf Windows
fails to boot, then there would be no way to reach Linux, for
example.


In some virtualization worlds, a host controls access to all
processor, memory, network, and storage resources. Anything that
makes use of hardware via the host is a guest.

On Power Systems, the hypervisor is in charge of doling out
processor and memory. Optionally, it can dole out selected
network hardware to the partitions. Network hardware and storage
hardware can be hosted by either VIOS or IBM i.





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