Virtualization

Virtualization is the process of creating a software-based (or virtual) representation of something rather than a physical one. Virtualization can apply to applications, servers, storage, and networks and is the single most effective way to reduce IT expenses while boosting efficiency and agility for all size businesses.

Benefits of Virtualization

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Virtualization can increase IT agility, flexibility, and scalability while creating significant cost savings. Workloads get deployed faster, performance and availability increases and operations become automated, resulting in IT that’s simpler to manage and less costly to own and operate.

Additional benefits include:

  • Reduce capital and operating costs.
  • Minimize or eliminate downtime.
  • Increase IT productivity, efficiency, agility and responsiveness.
  • Provision applications and resources faster.
  • Enable business continuity and disaster recovery.
  • Simplify data center management.
  • Build a true Software-Defined Data Center

Virtualization uses software to simulate the existence of hardware and create a virtual computer system. Doing this allows businesses to run more than one virtual system – and multiple operating systems and applications — on a single server. This can provide economies of scale and greater efficiency.

The Virtual Machine

A virtual computer system is known as a “virtual machine” (VM):  a tightly isolated software container with an operating system and application inside.  Each self-contained VM is completely independent. Putting multiple VMs on a single computer enables several operating systems and applications to run on just one physical server, or “host”.

A thin layer of software called a hypervisor decouples the virtual machines from the host and dynamically allocates computing resources to each virtual machine as needed.

Key Properties of Virtual Machines

VMs have the following characteristics, which offer several benefits.

Partitioning   

  • Run multiple operating systems on one physical machine
  • Divide system resources between virtual machines

Isolation

  • Provide fault and security isolation at the hardware level
  • Preserve performance with advanced resource controls

Encapsulation

  • Save the entire state of a virtual machine to files
  • Move and copy virtual machines as easily as moving and copying files

Hardware Independence

  • Provision or migrate any virtual machine to any physical server

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