LECTURE 13 -
VIRTUALIZATION
CONTENT
S
1. Introduction of virtualization
2. Architecture of virtualization
3. Types of virtualization
4. Hardware Virtualization.
5. Operating system Virtualization.
6. Server Virtualization.
7. Storage Virtualization.
8. Advantage and Disadvantage of virtualization.
9. Cloud v/s Virtualization
INTRODUCTION OF VIRTUALIZATION
Virtualization is a technique, which allows to share single physical instance of an
application or resource among multiple organizations or tenants (customers)..
Virtualization is a proved technology that makes it possible to run multiple
operating system and applications on the same server at same time.
Virtualization is the process of creating a logical(virtual) version of a server
operating system, a storage device, or network services.
The technology that work behind virtualization is known as a virtual machine
monitor(VM), or virtual manager which separates compute environments from the
actual physical infrastructure.
What is the concept behind the Virtualization
Creation of a virtual machine over existing operating system and hardware.
Host machine: The machine on which the virtual machine is created.
Guest machine: virtual machines referred as a guest machine.
Hypervisor: Hypervisor is a firmware or low-level program that acts as a Virtual
Machine Manager.
ARCHITECTURE OF VITUALIZATION
ARCHITECTURE OF VITUALIZATION
Types of Virtualization
1. Hardware Virtualization.
2. Operating system Virtualization.
3. Server Virtualization.
4. Storage Virtualization.
1. Hardware Virtualization
When the virtual machine software or virtual machine manager (VMM) is directly
installed on the hardware system is known as hardware virtualization.
The main job of hypervisor is to control and monitoring the processor, memory
and other hardware resources.
Usage:
Hardware virtualization is mainly done for the server platforms, because
controlling virtual machines is much easier than controlling a physical server.
1. Hardware Virtualization
2. Operating System Virtualization
When the virtual machine software or virtual machine manager (VMM) is
installed on the Host operating system instead of directly on the hardware system
is known as operating system virtualization.
Usage:
Operating System Virtualization is mainly used for testing the applications on
different platforms of OS.
Traditional Operating system Virtual Operating system
Architecture Architecture
3. Server Virtualization:
When the virtual machine software or virtual machine manager (VMM) is directly
installed on the Server system is known as server virtualization.
Usage:
Server virtualization is done because a single physical server can be divided into
multiple servers on the demand basis and for balancing the load.
3. Server Virtualization:
3. Server Virtualization:
4. Storage Virtualization
Storage virtualization is the process of grouping the physical storage from multiple
network storage devices so that it looks like a single storage device.
Storage virtualization is also implemented by using software applications.
Usage:
Storage virtualization is mainly done for back-up and recovery purposes.
4. Storage Virtualization
Cloud vs Virtualization
Cloud computer is internet based computing where virtual shared provide
Software, Infrastructure, platform.
Virtualized
API
Pay-as-per-use
Scalability
Virtualization can exist without the cloud but cloud computing cannot exist
without virtualization.
Cloud Computing Service Models
Advantages of Virtualization
1. Reduced Costs.
2. Efficient hardware Utilization.
3. Virtualization leads to better resource Utilization and increase performance
4. Testing for software development.
5. Increase Availability
6. Save energy
7. Shifting all your Local Infrastructure to Cloud in a day
8. Possibility to Divide Services
9. Running application not supported by the host.
Disadvantages of Virtualization
1. Extra Costs.
2. Software Licensing.
Conclusion
Mainly Virtualization means, running multiple operating systems on a single
machine but sharing all the hardware resources and it helps us to provide the pool of
IT resources so that we can share these IT resources in order get benefits in the
business.
One of the main cost-saving, hardware-reducing, and energy-saving techniques used
by cloud providers is virtualization
With OS virtualization each VM can use a different operating system (OS), and
each OS is isolated from the others.
Use VMs to enabling different services to run in separate VMs on the same physical
machine.
