The virtual extensions from Intel and AMD This type of virtualization is slower than the other two, since all operations at the level of machine language must be translated by the instruction format of the host system to the guest system. This mode is implemented by the KVM virtualization Įmulation : The control of software emulates the underlying hardware for the host system.

Paravirtualization : The control software exports an API to the hypervisor, which allows access to different hardware resources to the host system. It is also identified as virtualization software, and a well-known example is the implementation of VirtualBox In particular, it distinguishes between:įull virtualization also known as native : The characteristic of this mode is the presence of a hypervisor that implements the separation between the host system and the physical hardware of the machine, creating an insulation between the two domains.

It is possible to distinguish different types of virtualization, depending on how you run the virtual system. The operating systems running within each virtual machine guest are defined. The host system is the system that is running a virtualization software that creates a high level the different virtual machines, which function as if they were normal programs, communicating with the hardware only indirectly, through virtualization software that works at low level. In the context of virtualization, there are two different systems, host and guest. The uses of virtualization is probably the most popular operating system virtualization to create virtual servers for test server to support the development, or creating websites.

Virtualization is made possible by the excessive size of the hardware architectures in use today than those that are normal and most common uses of computers. This technique then allows the execution of one or more operating systems and associated software on a single computer without rebooting the system, and with the advantage of creating a secure environment where they are monitored and carry out the instructions of the virtual system. Any hardware or software resource can be virtualized, so you can have virtual versions of operating systems, memory, disk.

The technique of virtualization is to create a virtual version of a hardware resource normally provided physically, in particular the x86 virtualization is the creation of a virtual version of a resource belonging to a system with x86 architecture.

Linux virtualization