Need for Compute Virtualization

Need for Compute Virtualization

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

Compute Virtualization

Definition :

             It is a technique of masking or abstracting the physical compute hardware and enabling multiple operating systems (OSs) to run concurrently on a single or clustered physical machine(s).

•  Enables creation of multiple virtual machines (VMs), each running an OS and application
• VM is a logical entity that looks and behaves like physical machine
• Virtualization layer resides between hardware and VMs, Also known as hypervisor
• VMs are provided with standardized hardware resources

Compute Virtualization