This week, we took a look at what makes virtualization possible. If you are spinning up virtual machines, you are most definitely relying on a hypervisor to slice up the CPU, memory, and storage. But they don't all operate the same way, and it usually comes down to whether you are dealing with a Type 1 or Type 2 hypervisor.
Type 1, also known as "bare-metal," installs directly onto the server's physical hardware without needing an operating system beneath it getting in the way. It's like building a house directly on a fresh plot of land. It's fast, efficient, and is what data centers run. On the other hand, Type 2 hypervisors run on top of an existing OS, like Windows, macOS, and Linux. It's like renting an apartment inside an existing building. Because Type 2 hypervisors have to ask the host OS for resources, they have more overhead and are not quite as fast and efficient. However, if you just want to test a new Linux distro on your laptop without completely overwriting your main hard drive, they're great.
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