MS Client Virtualization Strategy.pdf

Desktop Virtualization Strategy

Choosing the right solution for your needs

ABSTRACT

Several forms of desktop virtualization can help organizations

satisfy users’ needs for mobility and lexibility, while relieving

pressure on information technology (IT) departments

to manage cost, security, and compliance. Additionally,

desktop virtualization can enable more dynamic centralized

management by separating the elements of the traditional

desktop computing stack. This white paper describes how to

create a virtualization strategy that achieves these goals and

introduces comprehensive desktop-virtualization solutions

from Microsoft. Finally, it provides high-level guidance to help

companies develop a desktop-virtualization strategy.

Desktop Virtualization Strategy

Evolving Needs of Users and IT Departments

Today’s computing environment requires IT departments

to address more PC management challenges than they

did just a few years ago. Users are increasingly demanding

access to their applications and data anywhere and from

any device. The rapid growth of knowledge workers

who roam from one PC to another within the ofice had

led companies to provide access to the users’ desktop

experience at any computer in the workplace, effectively

detaching the user from the physical PC.

and higher pressures on cost control. The cost of

deploying a traditional PC ranges from $160 to $350

and managing each PC costs another $200 to $1,300

per year 1 . Furthermore, lost or stolen laptops are more

common, and securing laptop and desktop PCs can

require signiicant resources. Data loss is not an option

today and such damage can be immeasurable. Finally,

compliance regulations (e.g., Sarbanes-Oxley, HIPAA)

have strict requirements for protecting privacy and

corporate data as well as public disclosure when issues

arise. Failure to protect this data can lead to signiicant

punitive consequences and a negative impact to the

organization’s reputation.

Additional challenges stem from users’ shifting views

of technology in the workspace. At home, they are

increasingly savvy about technology, and they expect

similar personal conigurations and freedoms in the

workplace. Users are now more likely to use their own

devices to access corporate applications, such as accessing

corporate email from their personal mobile phones.

Organizations are also looking for ways to help protect

the environment, including looking for ways to effectively

re-use older PCs instead of sending them to the landill.

While these trends are making employees more

productive, they are causing new challenges for IT

departments. New form factors, network dispersion,

and increased mobility result in more complexity

The question then is, “How can IT fulill users’ needs while

managing complexity and cost with better eficiency,

faster responsiveness, and additional business value or

competitive edge?”

Evolving Challenges

End Users

IT Pros

Increased Mobility

Anywhere access

Security & Compliance

Stolen laptops & data loss

•

Device independence

•

Stringent regulation

•

Roam across PCs

•

Protection of IT environment

Consumerization

More workspace freedom

Cost

Increased computing complexity

•

Flexible conigurations

•

Escalating operational costs

•

Access through own devices

•

Disaster recovery

1 IDC, Optimizing Infrastructure, 2006

2 | Desktop Virtualization strategy

Desktop Virtualization Strategy

The Promise of Desktop Virtualization

Companies are increasingly turning to virtualization as the

answer to their desktop challenges. Desktop virtualization

is the act of decoupling the different computing layers

and storing some or all of them in a data center (see igure

below).

companies to do the same with enterprise desktops

by providing the tools necessary to rearrange how

PC components interact and to choose where those

components reside.

Developing a Desktop Virtualization strategy

Through virtualization, employees can access their

applications and data very safely over a network

and the risk of data loss is minimized. On the IT side,

virtualization accelerates deployment of new capabilities

without needing to acquire new hardware and conigure

components. It also reduces application testing

requirements and compatibility issues and simpliies

disaster recovery and compliance.

There are many desktop virtualization options and possible

combinations and therefore the development of a desktop

virtualization strategy requires three distinct steps:

Map the available technologies

Deine user needs

Over the past few years, businesses have simpliied

their data center management via server virtualization

technologies and reaped enormous cost beneits in

the process. Now, new advances in virtualization and

more ubiquitous availability of broadband access enable

Match technologies with user needs.

The next sections provide more detail and guidance on

these steps.

What is Virtualization?

Virtualization is the act of decoupling one computing resource from others without impacting the usability across these resources. Rather than

locking the various layers together—the operating system (OS) to the hardware, the application to the OS, and the user interface and data to

the local machine – virtualization technologies loosen the direct reliance these parts have on each other.

Traditional Coniguration

Tight binding between layers

With Virtualization

Reduced dependency between layers

User State (Data and Settings)

User State Virtualization

Isolate and centralize user data & state

Application

Application Virtualization

Isolate and centralize applications management & deployment

Operating System

Desktop Virtualization

Isolate and centralize operating system management and deployment

Hardware

Desktop Virtualization strategy | 3

Desktop Virtualization Strategy

Desktop Virtualization Strategy Steps:

1 - Mapping the Technologies

enterprise management solution such as Microsoft

Enterprise Dekstop Virtualization (MEDV) to enhance

deployment and management of Virtual PC images on a

Windows ® Desktop, while also providing a seamless and

simple experience for the end-users, independent of the

local desktop coniguration and operating system.

Given the many layers of the computer stack and multiple

desktop virtualization options, it is useful to separate the

technologies into two groups (see igure below):

essential: These are the irst steps that the IT department

should consider given their relatively easier deployment and

possibility of obtaining signiicant beneits in the short term

with limited investments.

Server based

desktop virtualization solutions allow the execution of

an environment at one place and presentation of that

environment or user interface at a different location.

These technologies usually use remote desktop protocols,

such as RDP, to decouple the user interface location from

the execution environment location. Remote execution

enables organizations to use older PCs as “thin clients,”

giving users the beneit of newer applications and

versions of Windows while helping save the environment

by avoiding the dumping of electronics into landills.

Server-based desktop virtualization technologies include:

●

server-Based Desktop Virtualization:

The irst and simplest

virtualization strategy is to deploy user state

virtualization, which separates the user data and

settings from any PC and enables IT to store them

centrally (i.e., in the datacenter) while also making

them accessible on any PC. It also simpliies the central

backup of user data since data is already stored

centrally on servers.

user state virtualization.

●

This technology isolates

applications from each other and solves application

to application compatibility issues by allowing

applications to run together even though they may

require the same resources from the OS. It also reduces

the application testing and deployment effort because

IT no longer needs to test how different groups of

applications work together every time one of the

apps is patched or upgraded. Moreover, application

virtualization allows IT to store the application centrally

and stream the application to a desktop based on user

access. It further completely removes the applications

from the desktop footprint and allows IT to deploy a

smaller master image across variety of business groups.

application virtualization.

●

Microsoft terminal services remote Desktops.

Remote desktops use session virtualization to partition

a single OS into multiple user sessions in a cost

effective manner.

VDI

leverages machine virtualization technologies to allow

a single server to run many virtual machines. With

VDI, organizations can run multiple desktops, each in

a virtual machine, on the same server in a datacenter

and use remote desktop protocols to allow a user to

access the desktop outside the data center.

Desktop Virtualization Technologies

Virtualized Desktop infrastructure (VDi).

●

In many cases customers will choose to deploy some

applications locally on the PC and some applications

remotely using Terminal Services. Application

virtualization can be used in conjunction with the

deploy technologies available for both of these

scenarios.

Discretionary: These powerful technologies allow for

signiicant lexibility and eficiency but also require more

sophisticated technical skills and a larger investment of IT

resources. These optional technologies include:

Essential

Data Layer

User State Virtualization

Application Layer

Application Virtualization

Discretionary

Client hosted

desktop virutalization is a type of machine virtualization

technology (such as Microsoft ® Virtual PC) that separates

the operating system from the physical hardware and

allows a single PC to run virtual machines side by side

with the host OS. Typically, companies will require

Client-Hosted Desktop Virtualization.

●

Desktop Virtualization

Operating

System Layer

Server-based desktop

virtualization

Terminal

Services

Client-hosted

desktop

virtualization

VDI

4 | Desktop Virtualization strategy

Desktop Virtualization Strategy

Essential Desktop Virtualization Solutions

User State Virtualization

user state Virtualization

The user state includes users’ data as well as application or operating system

coniguration settings. Traditionally, users’ PCs contain the authoritative copy

of users’ data and settings. There are three main challenges with managing

the user state.

User PC

Server

Central copy of

user data and settings

The irst challenge is how to back up user data and settings that are

●

scattered from PC to PC and then restore users’ productivity after a laptop

is lost or stolen.

User State

Local Storage

User State

Central Storage

The second challenge is how to migrate the user state during operating

●

system migrations.

The inal challenge is how to make the data available to the user

●

regardless of the PC being used. In any case, user state virtualization

provides a solution.

With user state virtualization, organizations store users’ data and settings in a central location (and, optionally, cache them

locally for ofline usage when users are mobile). The result is that users are free to roam, and their data and settings follow

them. User state virtualization can also mitigate productivity loss of PC replacement. The central copy of the data is on the

network, so it is easily restored in case of a lost or stolen PC and the user’s settings can be re-applied automatically. When

IT sets up the policy to allow ofline access to the redirected folder, Windows ® BitLocker™ Full Volume Encryption should be

applied to the PC to help ensure data safety. A typical example of this type of virtualization is using Windows with Windows

Vista Folder Redirection with Ofline Files and a Roaming User Proile.

Folder Redirection, Ofline Files, and Roaming User Proile

Folder Redirection and Ofline Files are Windows ® features that enable IT staff to redirect users’ data and settings to a central

network location. See the last section for details.

application Virtualization

Application Virtualization

With application virtualization, organizations can store and manage

applications centrally, integrate with third party PC lifecycle management

and software distribution systems, or deploy using standalone media.

Businesses deliver applications on demand and then these applications

then cache and run locally. Application virtualization isolates applications

from one another, thus reducing application-to-application conlicts. The

application’s footprint on the PC is reduced because the application is

cached and not physically installed on the PC. Application virtualization

also enhances organizations’ ability to control access to applications, track

usage of virtual applications, and quickly test, deploy, update and remove

applications. Application virtualization simpliies the application lifecycle

from test, deployment, and management all the way through to end of life.

User PC

Server

Application loading

at launch

Applications

Central Storage

Applications

Processing

Centralized storage

and management of

applications

Applications run in

an isolated virtual

environment on the

local PC

Microsoft Application Virtualization transforms applications into centrally-managed virtual services that are never

installed and don‘t conlict with other applications. See the last section for details.

Application

Virtualization

Desktop Virtualization strategy | 5

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