Part-I http://world-of-virtualization.blogspot.com/2008/12/types-of-hypervisor-technology-part-i.html
Type II Hypervisors.
Type II Hypervisors run on an existing operating system that provides the interface. The guest operating systems then run on the Type II hypervisor at the third level above the hardware as can be seen in Figure:
Type II Hypervisors run on an existing operating system that provides the interface. The guest operating systems then run on the Type II hypervisor at the third level above the hardware as can be seen in Figure:
A Type II approach to Hypervisors
Once more, as in Type I, the three guest OS’s are unaware of the fact that they are running on anything but the hardware directly.
Comparison of the two Types of Hypervisors.
For speed and efficiency, the Type I Hypervisors are definitely better. Since they run directly on the hardware and manage it face to face, they are able to work without cutting through the various layers that hamper the speed of the Type II Hypervisors.
Type I hypervisors provide higher performance efficiency, availability, and security than Type II hypervisors.
Type II Hypervisors run on client systems where considerations of speed are less important. They can be installed directly on the Operating system and are thus much easier to setup.
In addition, Type II Hypervisors support a much broader range of hardware since the hardware resources are provided by the underlying Operating System on which it runs.
Examples of Type I Hypervisors are Microsoft’s Hyper-V and VMware ESX Server.
Examples of Type II Hypervisors are VMware GSX Server and Microsoft’s Virtual Server
Comparison of the two Types of Hypervisors.
For speed and efficiency, the Type I Hypervisors are definitely better. Since they run directly on the hardware and manage it face to face, they are able to work without cutting through the various layers that hamper the speed of the Type II Hypervisors.
Type I hypervisors provide higher performance efficiency, availability, and security than Type II hypervisors.
Type II Hypervisors run on client systems where considerations of speed are less important. They can be installed directly on the Operating system and are thus much easier to setup.
In addition, Type II Hypervisors support a much broader range of hardware since the hardware resources are provided by the underlying Operating System on which it runs.
Examples of Type I Hypervisors are Microsoft’s Hyper-V and VMware ESX Server.
Examples of Type II Hypervisors are VMware GSX Server and Microsoft’s Virtual Server
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