Last Updated on August 11, 2022 by rabiamuzaffar
Virtual Machine refers to a complete computer system with complete hardware system functions simulated by software and running in a completely isolated environment.
In the architecture of computer science, virtual machine refers to a special kind of software that can create an environment between the computer platform and the end user, and the end user operates the software based on the environment created by the software. In computer science, a virtual machine refers to a software implementation of a computer that can run programs like a real machine.
Virtual machines are divided into two broad categories based on their use and relevance to immediate machines. A system virtual machine provides a complete system platform that can run a complete operating system. In contrast, a program virtual machine is designed to run a single computer program, which means it supports a single process. An essential feature of a virtual machine is that the software running on the virtual machine is confined to the resources provided by the virtual machine – it cannot extend beyond the virtual world.
Through virtual machine software, you can simulate two or more virtual computers on one physical computer. These virtual machines work exactly like real computers. For example, you can install operating systems, install applications, access networks resources, etc. To you, it’s just an application running on your physical computer, but to an application running in a virtual machine, it’s a real computer. Therefore, when you perform software evaluation in a virtual machine, the system may also crash; however, it is only the operating system on the virtual machine that crashes, not the operating system on the physical computer, and use the “Undo” function of the virtual machine. , you can immediately restore the virtual machine to the state it was in before installing the software.
Virtualization refers to the operation of computer elements on a virtual basis rather than a real basis. Virtualization technology can expand the capacity of hardware and simplify the process of software reconfiguration. The virtualization technology of the CPU can simulate multiple CPUs in parallel on a single CPU, allowing one platform to run multiple operating systems at the same time, and applications can run in independent spaces without affecting each other, thereby significantly improving the work efficiency of the computer.
Virtualization is a solution to simplify management and optimize resources. Just like an open and transparent office building, the entire floor can hardly see the walls. Users can build a more autonomous and applicable office space at the same cost, thereby saving costs and making the most of the space utilization. This idea of re-planning limited and fixed resources according to different needs to achieve maximum utilization is called virtualization technology in the IT field.
Virtualization technology can expand the capacity of hardware and simplify the process of software reconfiguration. The virtualization technology of the CPU can simulate multiple CPUs in parallel on a single CPU, allowing one platform to run multiple operating systems at the same time, and applications can run in independent spaces without affecting each other, thereby significantly improving the work efficiency of the computer.
Virtualization technology is completely different from multitasking and hyperthreading technology. Multitasking means that multiple programs run in parallel in one operating system at the same time, while in virtualization technology, multiple operating systems can run at the same time, and each operating system has multiple programs running, and each operating system has It runs on a virtual CPU or virtual host; while hyper-threading technology is only a single CPU to simulate dual CPUs to balance the performance of the program. The two simulated CPUs cannot be separated and can only work together.
Virtualization technology is also different from VMware Workstation and other software that can also achieve virtual effects. It is a huge technological advancement, which is embodied in reducing the overhead related to software virtual machines and supporting a wider range of operating systems.
Virtualization can mean different things to different people, depending on the context of their field of work. The common interpretation is that it contains many virtual machines that harden the server. Experienced programmers may recall that there was a time when they worried about having available memory to hold their program instructions and data. The most basic operating systems now provide the function of virtual memory, so that programmers don’t have to think about this problem anymore.
However, the connotation of virtualization technology is far more than virtual memory and virtual server. Currently, we have technologies such as network virtualization, microprocessor server virtualization, file virtualization, and storage virtualization. If we think about virtualization technology in a broader context or from higher abstractions such as workload virtualization and information virtualization, virtualization technology becomes a very powerful concept that can provide end users, Applications and businesses offer many advantages.
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