VIRTUALIZATIONBy-Vivek jhaI.T.-2nd yr

Virtualization in real worldDreams

VIRTUALIZATION

Way of emulating hardware in software.

OrUsing virtualization we can run an

operating system on top of another.

History1960s

IBM’s Mainframe Computers (e.g. IBM S/360)

Compatible Time Sharing System (CTSS)

1980sDesktop PC Virtualization

1990s - PresentIA-32 Server HardwareVMware Introduces Workstation

Virtualization softwareIt is a program which can fool an

operating system into believing that it is utilizing the computer’s hardware which isn’t the case.

sandboxing.

How does it works?The real o.s. is running & managing a few

apps & services.One of those app & services is the

virtualization software.Virtualization software is running another o.s.

(the guest o.s.).The guest o.s. is thinking that it is running on

a computer.There are probably some app being run by the

guest o.s.The load being created by the guest o.s. is

being sent to the real hardware via the host o.s.

Real hardware

Host operating system

Virtualization software

Sandbox EnvironmentVirtual machine1 Virtual machine2

Why virtualization?Ease of useScalabilityEconomicalFailover and fault toleranceResource sharingEasy maintenance and monitoringOpportunity to experience new and

different o.s.

ShortcomingsVirtual Machine cannot represent real

scenario 100% accurately.

Guest OS Hardware Requirements.Host needs more RAM, HD Space, etc.

Security

Thank You