My Virualization Final

8/2/2019 My Virualization Final..

1/30

ANHA SINGH(0902810013)

APARAJITA(0902810018)


2/30

Virtualization


3/30

Allows multiple operating systems to run simultaneously on the

same machine.

The creation of a virtual version of something, such as a hardware

platform, operating system, a storage device or network resources.

Allows access to shared network resources like memory,

databases.

Virtualization is an approach for deploying computer resource

that isolate different layers hardware, software, data, network,

storage from each other

- Microsoft Corporation


4/30

X-86 operating systems run directly on the baremetal hardware.

Four levels of privilege are present :

Ring 0Ring 1

Ring 2

Ring 3


5/30


6/30

Outer ring can access the inner ring in a predefinedmanner through special gates.


7/30

Get more out of your existing resources.

Reduce datacenter costs by reducing your physicalinfrastructure and improving your server to

admin ratio. Increase availability of hardware and

applications for improved business continuity.

Gain operational flexibility.

Improve desktop manageability and security.


8/30

Hardware Virtualization

Software Virtualization

Memory Virtualization

Storage VirtualizationData Virtualization

Network Virtualization


9/30

Creation of virtual machine by the Hypervisor(Virtual Machine Monitor)

Separation of running softwares from underlying

hardware resourcesHost machine : the Actual Machine

Guest machine : the virtual Machine

Virtual Machine?


10/30

Software implementation of a machine.

A tightly isolated software container.

Can provide a different instruction set architecture than

that of real machine.


11/30

System Virtual Machine

Process Virtual Machine


12/30

Also called Hardware Virtual Machine.

Provides a complete system platform .

Allows the sharing of the underlying physical machineresources among different virtual machines.


13/30

Also called Application Virtual Machine.

Runs as a normal application inside OS and

supports a single process only. Purpose is to provide a platform independent

programming environment.

Generally implemented using an Interpreter.


14/30

Encapsulation

Portablity

Less Efficient

Unstable Performance

Concurrency depends onnumber of CPUs involved.

Virtual Machine Contd..


15/30

A software that helps in creation of VM.

Also called Virtual Machine Monitor or

Virtualization Manager. Can run on bare hardware or on the top of OS.

Can manage multiple OSs or multiple instancesof same machine on a single machine.


16/30

Abstraction between

the platform hardware

and OSs.

Hypervisor contd


17/30

Abstraction between

the platform hardware

and OSs.

Resource allocator.

Hypervisor contd


18/30

Runs directly on the system

hardware.

Guest OS knows that it isrunning on a virtualized

system.

OS needs to be specially

modified.

Xen, Microsoft Hyper-V

Type 1 Hypervisor


19/30

Runs over a conventional

OS.

Host OS must provide

virtualization support

services.

VMware Workstation,KVM

Type 2 Hypervisor


20/30

Full Virtualization

Partial Virtualization

Para Virtualization

Types of HardwareVirtualization


21/30

Almost complete simulation of the

actual hardware .

The guest OS requires no

modification.

Hypervisor interfere only for

executing some sensitive instructions.

VM's cannot interfere with eachother.

Full Virtualization


22/30

Simulation of some but not all of the targetenvironment .

Entire operating system cannot run in the virtualmachine.

Easier to implement than full virtualization.


23/30

Presents a software interface to

virtual machines that is similar but

not identical to that of the underlying

hardware.

Guest operating system needs to be

explicitly ported for the para-API.

Need modification of guest OS or

installation of special hypervisor-

aware drivers .

Para Virtualization


24/30

Operating System level virtualization : Allows running

multiple OSs on same machine.

Application Virtualization : Encapsulates a softwareapplication from underlying OS.

Workspace Virtualization : Several applications are bundled

in a single work space.

Software Virtualization


25/30

Sharing of physical memory.

Dynamic allocation of memory to VMs.

Guest OS cant access the machines physical memory

directly.

Memory Virtualization


26/30

File Virtualization : Creates a logical pool of files .

Removes access dependencies.

Block Virtualization : Applicable to block based storage.

Much of ready data available to

clients.

Distributed File System : Allows accessing of file over a

network.

Storage Virtualization


27/30

Data access without regard to physical storage and

heterogeneous nature.

Data accessing through different databases placed at different

location.

Data Virtualization


28/30

Desktop Virtualization : Client Virtualization.

Remote Desktop Connection.

Network Virtualization : Sharing of hardware and

software resources over the

network.

Network Virtualization


29/30

Avoids double boot.

More utilization of resources like memory and CPU.

Service isolation.

Easy disaster recovery.

Easy means of testing.

No registries, DLLs or other issues.

Application Streaming

Cyclical Shift back to Servers.

Summary


30/30

Documents

My Virualization Final