![]() ![]() Type 2 hypervisors, on the other hand, emulate any and all architectures regardless of the host CPU, at least in theory. For example, it can only create VMs with x86 architecture if the machine has an x86 CPU. Type 1 hypervisors can only emulate the same architecture as of the host CPU.In general, type 1 hypervisors are a lot faster than type 2 hypervisor.Type 2 virtualization is also called emulation, to distinguish it from type 1 or true virtualization. Type 2 hypervisor: These run on top of a host OS, and thus it translates system calls made by the guest OS to system calls made to the host OS. KVM, which is a Linux kernel module and part of the official Linux kernel.Type 1 hypervisor: These run on bare metal and typically leverage features of the CPU specifically built for virtualization, for example, AMD-V and Intel VT-x. Hypervisors can be generally categorized into two types. The hypervisor manages and provides resources to the guest OS, and it translates system calls of the guest OS to suitable system calls or hardware interrupts in the host system. The system on which the hypervisor runs virtual machines is called the host system, and the virtual machines themselves are called guest systems. Virtualization, i.e., creating and running virtual machines, is handled by something called a hypervisor, which can either be software, firmware or hardware. ![]() I intend it to serve as a reference, especially for beginners who are just getting started with virtualization and system administration in general. In this post, I will explore some core concepts and terminologies regarding virtualization in Linux systems. ![]()
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