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| Need for Compute Virtualization |
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Before Virtualization
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After Virtualization
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Runs single operating system (OS) per machine at a
time
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Couples s/w and h/w tightly
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May create conflicts when multiple applications
run on the same machine
• Underutilizes resources
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Is inflexible and expensive
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Runs multiple operating systems (OSs) per physical
machine concurrently
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Makes OS and applications h/w independent
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Isolates VM from each other, hence, no conflict
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Improves resource utilization
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Offers flexible infrastructure at low cost
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