Difference between revisions of "Hypervisor"
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The Type 2 hypervisors, for example VMware Workstation or Oracle VirtualBox, run as an application within the host operating system, ex: as a Linux or Windows program. To minimize overhead, Type 1 hypervisors avoid the need for the host to run another operating system, and they instead run directly on the bare-metal hardware. Examples of Type 1 hypervisors include VMware ESXi, Microsoft Hyper-V, and KVM. | The Type 2 hypervisors, for example VMware Workstation or Oracle VirtualBox, run as an application within the host operating system, ex: as a Linux or Windows program. To minimize overhead, Type 1 hypervisors avoid the need for the host to run another operating system, and they instead run directly on the bare-metal hardware. Examples of Type 1 hypervisors include VMware ESXi, Microsoft Hyper-V, and KVM. | ||
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| + | Early hypervisors were created by IBM, including [[CP_operating_system|CP/CPS]] and [[VM/370]], which allowed for creating VMs of different operating systems on the mainframe. | ||
[[File:Hypervisor-type1vs2.png]] | [[File:Hypervisor-type1vs2.png]] | ||
Revision as of 12:21, 18 December 2023
A hypervisor is a software package which provides virtual machines.
There are two main types of hypervisors, classified by their level of abstraction from the physical hardware:
- Type 1 - 'native' hypervisors, which are operating systems which run directly on the bare machine
- Type 2 - 'hosted' hypervisors, which are applications which run under a general-purpose OS.
The Type 2 hypervisors, for example VMware Workstation or Oracle VirtualBox, run as an application within the host operating system, ex: as a Linux or Windows program. To minimize overhead, Type 1 hypervisors avoid the need for the host to run another operating system, and they instead run directly on the bare-metal hardware. Examples of Type 1 hypervisors include VMware ESXi, Microsoft Hyper-V, and KVM.
Early hypervisors were created by IBM, including CP/CPS and VM/370, which allowed for creating VMs of different operating systems on the mainframe.
