Virtualization has made a lot of progress during the last decade, primarily due to the development of myriad open source virtual machine hypervisors. This progress has almost diminished the barriers between operating systems. There are mainly two types of virtualizations; Software Virtualiztion and Hardware Virtualization. Up until recently, the focus always has been on softwareemulated virtualization.
KVM is short for Kernelbased Virtual Machine and makes use of hardware virtualization, i.e., you need a CPU that supports hardware virtualization, e.g. Intel VT or AMDV. Connsidering the time line of virtualization techniques, KVM is a relative newcomer. Several incumbent open source methods exist today, such as Xen, Bochs, UML, Linux VServer, and coLinux, but KVM is receiving a surprising amount of exposure now. KVM is a unique hypervisor. It consists of a loadable kernel module that provides the core virtualization infrastructure and a processor specific module. Using KVM virtualization, one can run multiple virtual machines...
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