Unit -10 : Virtualization Concepts
(1) What is virtualization? Explain in details.
▪ Virtualization is the process of creating a software-based, or virtual,
representation of something, such as virtual applications, servers, storage and
networks.
▪ It is the single most effective way to reduce IT expenses while boosting efficiency
and agility for all size businesses.
▪ Operating system based Virtualization refers to an operating system feature in which
the kernel enables the existence of various isolated user-space instances.
▪ The installation of virtualization software also refers to Operating system-based
virtualization.
▪ It is installed over a pre-existing operating system and that operating system is
called the host operating system.
▪ In this virtualization, a user installs the virtualization software in the operating
system of his system like any other program and utilize this application to operate
and generate various virtual machines.
▪ The virtualization software allows direct access to any of the created virtual machine
to the user.
▪ As the host OS can provide hardware devices with the mandatory support, operating
system virtualization may affect compatibility issues of hardware even when the
hardware driver is not allocated to the virtualization software.
▪ Virtualization software is able to convert hardware IT resources which require
unique software for operation into virtualized IT resources.
▪ As the host OS is a complete operating system in itself, many OS based services are
available as organizational management and administration tools can be utilized for
the virtualization host management.
Full Virtualization:
▪ Virtual machine simulates hardware to allow an unmodified guest OS to be run in
isolation.
▪ There is two type of Full virtualizations in the enterprise market.
▪ On both full virtualization types, guest operating system’s source information will
not be modified.
1. Software assisted full virtualization
2. Hardware-assisted full virtualization
▪ It is also referred as true or pure virtualization.
▪ It completely relies on binary translation to trap and virtualize the execution of
sensitive, non-virtualizable instructions sets.
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(1) What is virtualization? Explain in details.
▪ Virtualization is the process of creating a software-based, or virtual,
representation of something, such as virtual applications, servers, storage and
networks.
▪ It is the single most effective way to reduce IT expenses while boosting efficiency
and agility for all size businesses.
▪ Operating system based Virtualization refers to an operating system feature in which
the kernel enables the existence of various isolated user-space instances.
▪ The installation of virtualization software also refers to Operating system-based
virtualization.
▪ It is installed over a pre-existing operating system and that operating system is
called the host operating system.
▪ In this virtualization, a user installs the virtualization software in the operating
system of his system like any other program and utilize this application to operate
and generate various virtual machines.
▪ The virtualization software allows direct access to any of the created virtual machine
to the user.
▪ As the host OS can provide hardware devices with the mandatory support, operating
system virtualization may affect compatibility issues of hardware even when the
hardware driver is not allocated to the virtualization software.
▪ Virtualization software is able to convert hardware IT resources which require
unique software for operation into virtualized IT resources.
▪ As the host OS is a complete operating system in itself, many OS based services are
available as organizational management and administration tools can be utilized for
the virtualization host management.
Full Virtualization:
▪ Virtual machine simulates hardware to allow an unmodified guest OS to be run in
isolation.
▪ There is two type of Full virtualizations in the enterprise market.
▪ On both full virtualization types, guest operating system’s source information will
not be modified.
1. Software assisted full virtualization
2. Hardware-assisted full virtualization
▪ It is also referred as true or pure virtualization.
▪ It completely relies on binary translation to trap and virtualize the execution of
sensitive, non-virtualizable instructions sets.
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