Hypervisor
Types
A Type 2 hypervisor, also called a hosted hypervisor,
is a virtual machine manager that is installed as a software application on an
existing operating system (OS).
There
are two types of hypervisors: Type 1 and Type
2. Type 2 hypervisors support guest virtual machines by
coordinating calls for CPU, memory, disk, network and other resources through
the physical host's operating system. This makes it easy for an end user to run
a virtual machine on a personal computing device. Examples of this type of
hypervisor include VMware, Oracle
Virtual Box, Oracle VM for x86, Solaris Zones, Parallels and VMware
Workstation.
In
contrast, a Type 1 hypervisor (also called a bare
metal hypervisor) is installed directly on physical host server hardware
just like an operating system. Type 1 hypervisors run on dedicated hardware.
They require a management console and are used in data centers. Examples of
this type of hypervisor include Oracle
OVM for SPARC, ESXi, Hyper-Vand KVM.
Regardless
of the implementation, virtual machines (VMs) and their guest operating systems are
typically unaware of which type of hypervisor is implemented, as they interact
only with the hypervisor itself.
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