[dropcap]V[/dropcap]irtualization is the creation of a virtual (rather than actual) version of something, or Virtualization refers to the creation of a virtual resource such as a server, desktop, operating system, file, storage or network.
In computing, virtualization means to create a virtual version of a device or resource, such as a server, storage device, network or even an operating system where the framework divides the resource into one or more execution environments.
What is Virtualization Technology?
Virtual machine concept was in existence since 1960s when it was first developed by IBM to provide concurrent, interactive access to a mainframe computer.
Over the last 10 years, the trend in the data center has been towards decentralization, also known as horizontal scaling. Centralized servers were seen as too expensive to purchase and maintain. Due to this expense, applications were moved from a large shared server to their own physical machine, often using commodity hardware. Decentralization helped with the ongoing maintenance of each application, since patches and upgrades could be applied without interfering with other running systems. For the same reason, decentralization improves security since a compromised system is isolated from other systems on the network.
Why It Matters
As virtualization disentangles the operating system from the hardware, a number of very useful new tools become available. Virtualization allows an operator to control a guest operating system’s use of CPU, memory, storage, and other resources, so each guest receives only the resources that it needs. This distribution eliminates the danger of a single runaway process consuming all available memory or CPU. It also helps IT staff to satisfy service level requirements for specific applications.
Virtualization can be categorized into different layers: desktop, server, file, storage and network. Each layer of virtualization has its own set of advantages and complexities. The technology offers many benefits, including low or no-cost deployment, full resource utilization, operational cost savings and power savings. However, deploying virtualization technology requires careful planning and skilled technical experts. Since the virtual machines use the same resources to run, it may lead to slow performance.
It’s a little bit complex let’s watch this Video to understand:
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