Virtual is at Ion

8/2/2019 Virtual is at Ion

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VIRTUALIZATION

BY

SREERAG.S.J



What is virtualization?

The term virtualization broadly describesthe separation of a resource or requestfor a service from the underlying physicaldelivery of that service.

Generally virtualization refers running

multiple operating systems on singlecomputer



A System Without Virtualization



Virtualization Technologies

Hardware Virtualization: Decouplingoperating system from hardware

Application Virtualization: Decouplingapplication from operating system

Presentation Virtualization: Separating anapplication’s user interface from thephysical machine the application runs on



Hardware VirtualizationIt is running multiple operating systems on a single machine

It is the most common virtualization visible today

The core idea of Hardware Virtualization is simple: Usesoftware to create a virtual machine (VM) that emulates a

physical computer

It’s called as Desktop Virtualization when used in clients andcalled as Server Virtualization when used in server





Advantages

Avoid incompatibility betweenapplication and O.S

Economic

Restoration of failed systems areeasier



Microsoft’s products Hyper-V

• Provides h/w virtualization for servers

Virtual Desktop Interface

• Defines a way to create virtual desktops

Virtual P.C 2007

• Provides hardware virtualization for desktop systems

M.S Enterprise Desktop virtualization

• Allows administrator’s to create multiple V.M’s and distribute it among clients



Presentation VirtualizationPresentation virtualization allows anapplication to run in a remote server andprovides it’s user interface locally

This is done by creating virtual sessions bya server, each interacting with a remotedesktop system

Multiple virtual sessions can use samecopy of installed application



Advantages

Data can be centralized

Cost of managing application can bereduced

Incompatibility between application and O.S

can be avoided

Improve performance



Microsoft’s products Windows Terminal Service

• Allows a server to run an application and provides it’s user interface to a remote machine



Application Virtualization

Application virtualization allows looseningthe bond between application and O.S

It removes the incompatibility’s betweenapplications installed on same O.S

This is done by creating application specificcopy’s of all resources such as registryentry’s , DLL’s etc…….





Microsoft’s products Microsoft’s Application Virtualization (App-V)

• An App-V administrator can create virtual application’sand deploy them



Managing a virtualized worldWhen a computing environment become more virtual itbecome more abstract

Increasing abstraction will increase complexity

So virtual world must be managed well to avoidcomplexity

Microsoft provides a family of tools for managing virtualenvironment

They can be used for both virtual and physical world



Microsoft’s management products

System Center OperationsManager 2007

System Center ConfigurationManager 2007 R2,

System Center Virtual MachineManager 2008



Microsoft’s VirtualizationTechnology’s -

Explained





Child partitions can run any othersupported operating system



Hyper-v can run both 32 bit 64 bit O.S’s

For storage it uses virtual hard disk(VHD)

Server 2008 has an installation option Server

Core in which only a limited subset of the system’sfunctions is installed. This reduces both themanagement effort and the possible securitythreats for this system



Virtual Desktop Infrastructure(VDI)

The VMs that Hyper-V provides canbe used in many different ways.

Using an approach called VDI

For example, Hyper-V can be used

to run client desktops on a server





Virtual PC 2007

Is used to run guest operating systems on adesktop machine

Can run on Windows XP , Windows 7

It can run variety of X86 based O.S’s asguest’s

The virtualization software runs on top ofthe client machine’s operating system





Presentation virtualization

Windows Terminal Service

Terminal service works with standard Windowsapplications

It can send the whole desktop to remote client or aspecific application

It’s possible with a remote desktop connection running onclient which communicate with terminal service with RDP





The Remote Desktop Connection runson Windows XP and Windows Vista,and earlier versions of Windows alsoprovide Terminal Services clients

It moves most of the work anapplication does from a user’s desktop

to a shared server



Application Virtualization: MicrosoftApplication Virtualization (App-V)

Originally known as Soft Grid

application-specific copies of potentially shared resourcesare included in each virtual application

virtual applications can be stored on a central machinerunning System Center Application Virtualization

The first time a user starts a virtual application, this serversends the application’s code to the user’s system via aprocess called streaming.



The virtual application then begins executing

After this initial download, applications are stored in alocal App-V cache on the machine, Future uses of theapplication rely on this cached code

The application can use all resources in the system but allof the resources it uses that might conflict with otherapplications on this system have been made part of the

virtual application itself

For this to work, applications must be packaged using aprocess called sequencing before they are downloaded



Using App-V’s wizard-based

Sequencer tool, an administratorcreates a virtual application fromits ordinary counterpart

It packages the application intothe App-V format, including

application-specific copies of thisinformation



Managing virtual environment

System center operations manager

Focused on managing hardware andsoftware on desktops, servers, and otherdevices, the product supports a broadapproach to systems management

To deal with different componentsoperation managers relies onManagement Packs (MPs)



Each MP encapsulates knowledge and more abouthow to manage a particular component, and each

one is created by people with extensive experiencein that area

By installing the appropriate MPs, an organizationcan exploit the knowledge of a product’s creators tomanage it more effectively

Operations Manager can manage virtual as well asphysical machines. Operations Manager relies on anagent that runs on each machine it manages, and soevery machine—physical or virtual—has its ownagent.





System centre configuration manager

Deploying the right software onto the rightmachines, then keeping that software up todate can be a herculean task

To address these challenges, Microsoftprovides Configuration Manager

It also manages physical and virtual world





System centre virtual machine manager

Operations Manager and Configuration Managerworks for both virtual and physical world viewingboth in much the same way. But virtualization alsobrings its own unique management challenges

It is most common in hardware virtualization

Virtual Machine Manager provides a central console,allowing many VMs to be managed from a singlepoint



Options provided by virtual machinemanager

Creating a new VM from scratch, specifying its CPU type, memory size, andmore.

Converting a physical machine’s environment into a new VM, a process knownas P2V.

Creating a new VM from an existing VM.

Converting an existing VM created using VMware into Microsoft’s VHD format.

Using a template. Each template is a virtual machine containing a deployment-ready version of Windows that can be customized by the administrator







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Virtual is at Ion