Virtualization, in the context of cloud native computing, refers to the process of taking a physical computer, sometimes called a server, and allowing it to run multiple isolated operating systems. Those isolated operating systems and their dedicated compute resources (CPU, memory, and network) are referred to as virtual machines or VMs. When we talk about a virtual machine, we’re talking about a software-defined computer. Something that looks and acts like a real computer but is sharing hardware with other virtual machines. Cloud computing is primarily powered by virtualization technology. As an example, you can lease a “computer” from AWS – that computer is actually a VM.
Problem it addresses
Virtualization addresses a number of problems, including the improvement of physical hardware usage by allowing more apps to run on the same physical machine whilst still being isolated from each other for security.
How it helps
Apps running on virtual machines have no awareness that they are sharing a physical computer. Virtualization also allows the users of the datacenter to spin up a new “computer” (aka a VM) in minutes without worrying about the physical constraints of adding a new computer to a datacenter.
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