TYPES OF VIRTUALISATION
Although server virtualisation technology is the
most popular technology, virtualisation is not
limited to servers. Virtualisation can be applied
to OSs, desktops, applications, storage and
networks. VM technology is also being used
in data storage, such as storage area networks,
and inside OSs, such as Windows Server 2008
with Hyper-V. Virtualisation in a distributed
environment is the basis for grid computing
and cloud computing—supplying a computing
infrastructure as a utility, on-demand service.
Virtualisation can be categorised into
three areas:
1. Storage virtualisation—Virtualises the
physical storage from multiple network storage
devices so that they appear to be a single storage device. In general, ‘virtualisation’ refers to server
virtualisation.
2. Network virtualisation—Combines computing resources
in a network by splitting the available bandwidth into
independent channels that can be assigned to a particular
server or device in real time
3. Server virtualisation—Hides the physical nature of server
resources, including the number and identity of individual
servers, processors and OSs from the software running
on them
TYPES OF VIRTUALISATION
Although server virtualisation technology is the
most popular technology, virtualisation is not
limited to servers. Virtualisation can be applied
to OSs, desktops, applications, storage and
networks. VM technology is also being used
in data storage, such as storage area networks,
and inside OSs, such as Windows Server 2008
with Hyper-V. Virtualisation in a distributed
environment is the basis for grid computing
and cloud computing—supplying a computing
infrastructure as a utility, on-demand service.
Virtualisation can be categorised into
three areas:
1. Storage virtualisation—Virtualises the
physical storage from multiple network storage
devices so that they appear to be a single storage device. In general, ‘virtualisation’ refers to server
virtualisation.
2. Network virtualisation—Combines computing resources
in a network by splitting the available bandwidth into
independent channels that can be assigned to a particular
server or device in real time
3. Server virtualisation—Hides the physical nature of server
resources, including the number and identity of individual
servers, processors and OSs from the software running
on them
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