Virtulization

And Its Role To Enable the Cloud Computing System Model

By,

Radhika Kalavadiya

(130040116019)

What is Virtualization

Virtualization :the abstraction of computer resources.

Defenition :Virtualization is a Technology that transforms hardware into software.

Virtualization allows to run multiple operating systems as virtual machines.

Each copy of an operating system is installed in to a virtual machine.

How Virtulization Works?

• A Virtualization layer is installed.

Uses Bare-metal or Hosted Hypervisor architecture.

• A bare-metal hypervisor system does not require operatingsystem.

• Hypervisor is operating system.

• Host based Virtualization requires operating system(windows or linux) installed on the computer.

• Virtualization layer installed as application on operating system.

1. VMWare Server is free application supported by windows or linux.

Why Virtulization?

Consolidate the workloads of several under-utilized servers

to fewer machines, perhaps a single machine.

Provides secure, isolated sandboxes for running untrusted

applications.

Provides emulation of hardware, or hardware configuration

that you do not have (such as multiple processors).

Virtualization can also be used to simulate networks of

independent computers.

Virtual machines can be used to run multiple operating

systems simultaneously. Some such systems may be hard or

impossible to run on newer real hardware.

Allow for powerful debugging and performance monitoring.

Operating systems can be debugged without losing

productivity.

Virtual machines can isolate what they run, so they provide

fault and error containment.

Virtual machines are great tools for research and academic

experiments. They encapsulate the entire state of a running

system. The state also provides an abstraction of the

workload being run.

Virtualization can enable existing operating systems to run

on shared memory multiprocessors.

Virtual machines can be used to create arbitrary test

scenarios, and can lead to effective quality assurance.

What is Virtual Machine?

Isolated guest operating system installation within a normal

host operating system.

From the user perspective, virtual machine is software

platform like physical computer that runs operating systems

and apps.

Virtual machines posses hardware virtually.

Types Of Virtulization

There are mainly 5 types of virtulization.

Platform Virtualization (Close to Cloud Computing)

• Full Virtualization

• Paravirtualization

• Hardware-assisted Virtualization

• Partial Virtualization

• OS-level Virtualization

Memory Virtualization

Desktop Virtualization

Application Virtualization

Network (Device and I/O) Virtualization

Full Virtulization

Full virtualization uses a special kind of software called

a hypervisor. The hypervisor interacts directly with the

physical server's CPU and disk space. It serves as

a platform for the virtual servers' operating systems.

Para Virtulization

The para-virtualization approach is a little different than

the full virtualization technique, the guest servers in a

para-virtualization system are aware of one another.

OS Level Virtulization

An OS-level virtualization approach doesn't use a hypervisor

at all.Instead,the virtualization capability is part of the

host OS,which performs all the functions of a fully virtulized

hyperviser.

Creating multiple logical server OS instances on one physicalpiece of hardware

Hypervisor is installed on one physical server

Multiple instances of server OS are installed.

Desktop Virtulization

Virtual Desktop Infrastructure (VDI) is a desktop deliverymodel which allows client desktop workloads (operatingsystem, application, user data) to be hosted and executed onservers in the data center

Users can communicate with their virtual desktops through aclient device that supports remote desktop protocols such asRDP

This allows you to virtualize Windows desktops in thedatacenter and deliver them on demand to any user —anywhere

Storage Virtulization

Storage Virtualization is the next frontier in Storage Advances

that aims to provide a layer of abstraction to reducecomplexity

Hardware Virtulization

Computer hardware virtualization is the virtualization of

computers or operating systems.

It hides the physical characteristics of a computing

platform from users, instead showing another abstract

computing platform.

Role Of Virtulization

Virtualization and Cloud Computing

The underpinning for the majority of high-performing clouds is a virtualizedinfrastructure.

Virtualization has been in data centers for

several years as a successful IT strategy for consolidating servers.

Used more broadly to pool infrastructure resources, virtualization can

also provide the basic building blocks for your cloud environment to enhanceagility and flexibility.

Cloud Computing, In the following slides we are going to to speak aboutCloud Properties Enabled by Virtulization.

To Enable Cloud Computing

Service

Scalability

Virtual machine system automatic scale up.

Availability

Fault tolerant of hardware and software.

Manageability

Automatic physical to virtual system transformation

Performance

Dynamically virtulization