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The only drawback that I can find with the virtual server (VE) approach
is that if you encounter a kernel panic then you lose all the VE's at
once. But that occurence is usually rare enough to warrant the small
risk. The VE solution is trailing behind VM solution for now but as
soon as the VE support framework lands in the kernels then things will
change. There is much discussion on the kernel threads about this right
now. I think we will see about 50-50 breakdown between the two
approaches to virtualization in the future. As far as CO2 footprint and
such, I'm afraid VE will win this type of battle easily. Much less
wasted cycles.
Gerry
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