The Kernel-based Virtual Machine is an open source virtualization technology built into Linux. Specifically, KVM lets you turn Linux into a hypervisor that allows a host machine to run multiple, isolated virtual environments. In other words, KVM allows you to run the kernel on the root node making it possible to run other OS (operating systems). KVM requires the hardware to run its own virtualization extensions, but this should not be a problem given that most non-Atom Intel processors and AMD processors come with these extensions. The virtualization is attained with the help of a hypervisor.
The KVM hypervisor is installed on the machine acting as the virtualization level of the system and enabling the host system to manage the guest virtual machines. The KVM virtualization technology is built into the standard Linux kernel which enables it to act as a hypervisor. The kernel will act as a second level hypervisor since the guest machine is packed with its own kernel. There are different types of hypervisor each catering to diverse requirements. KVM VPS gives you the complete autonomy to set the values for your resources based on the requirements of your application. It provides virtualization of only the existing system’s hardware resources. So, all the shared resources such as disk space, CPU time, and network will be fairly distributed by the hypervisor. For developers it will be interesting to know that KVM can run a 32-bit guest OS on a 64-bit host.
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