Virtual machines are widely available and are easy to manage and maintain. Some of the advantages of a virtual machine include:Īllows multiple operating system environments on a single physical computer without any intervention. It is created when the process is started, and destroyed upon exit.Ī process VM is used to mask the information of the underlying hardware or operating system, and allows program execution to take place in the same way on any given platform. Process Virtual MachineĪlso known as application VM, a process virtual machine is designed to provide a platform-independent programming environment that supports a single process. The virtualization technique is provided by the hypervisor, which can run either on bare hardware or on top of an operating system. This allows for load balancing of resources across VMs on a single host.ĭepending on their use and level of correspondence to any physical computer, virtual machines can be divided into two categories: System Virtual MachinesĪ system platform that supports the sharing of the host computer's physical resources between multiple virtual machines, each running with its own copy of the operating system. The VM has virtual hardware resources that map to the physical hardware on the server (host). The computer’s operating system and applications are separated from its hardware so that each new virtual machine can access the physical resources of the original server, which are managed by the hypervisor. ![]() A lightweight software known as hypervisor allocates the computing resources (RAM, CPU power, memory, storage, etc.) of the server or host to each VM, keeping all of them separate to avoid interference. Virtual machines are implemented by software emulation methods or hardware virtualization techniques. VMs are also used in production and as back-ups. For example, they can be used for testing purposes, especially to perform risky tasks such as running malicious software, testing operating systems, and accessing malware-infected data. They are also widely implemented as a sandboxed environment that are separated from the rest of the network. ![]() Virtual machines are often created to perform certain tasks that are different than tasks performed in a host environment. Virtual machines are becoming more common with the evolution of virtualization technology. In other words, a VM is a software application that performs most functions of a physical computer, actually behaving as a separate computer system.Ī virtual machine, usually known as a guest, is created within another computing environment referred as a "host." Multiple virtual machines can exist within a single host at one time.
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