"Virtualization technology was part of the IBM mainframe decades
before virtualization gained its current industry adoption. The
recent broader adoption of virtualization is due to the fact that
enterprise datacenters can no longer keep up with the demands of
new applications by adding racks of servers. Datacenters are
already overstretched in terms of server count, electricity
consumed, and heat generated per square foot of raised floor
"While virtualization, which reduces server count by increasing
utilization efficiency and lowering operating costs, is an
excellent solution to the problem of overwhelming demand, it can
also add a burden to system availability since more applications
are now running in each box. Any failure can now cause more
disruption to business..."
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