Re: Unix runs faster, maybe (was: Re: Educating potential VMS users)

Doug Phillips wrote:
Bill Todd wrote:
Main, Kerry wrote:
And btw, a server with low cpu utilization, but heavy IO makes for a
poor candidate for virtualization.
Remember that virtualization adds
another level of overhead for both IO and CPU loads.
As far as disk I/O goes, horse*** again: the CPU overhead, even with
virtualization added, is a relatively small component of the latency in
a disk access, and since you've already posited that the CPU has cycles
to burn, the added CPU overhead of virtualization is not a problem.


Buzzword alert! Buzzword alert!

From Wikipedia: Virtualization "is a broad term that refers to the
abstraction of resources across many aspects of computing."

It looks to me like there are as many flavors of "virtualization" as
there are marketing companies abusing the word. The word
"virtualization", used without further definition, is not deserving of
a "horse***" rebuttal; it is deserving of a buzzword alert, though.

Perhaps you should better acquaint yourself with the context in which Kerry used the term (and to which I responded): it's fairly clear what kind of 'virtualization' he was talking about (but should you still be in any doubt you could clarify your insight further by seeing how he's touted it in the past).

- bill
.