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Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
Microsoft Word - Whitepaper - Desktop Virtualization
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Microsoft Word - Whitepaper - Desktop Virtualization

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  • 1. WHITE PAPER VIRTUALIZATION OF THE DESKTOP Desktop Virtualization - Abstract that creates numerous challenges including data security; update and refresh cycles; Today’s computing needs require IT power, heat and space consumption; and the departments to address more PC management of local packaged applications management challenges than they did just a like productivity suites and browsers, as well few years ago. Users increasingly demand as home-grown applications. access to their applications and data at any location and from any device. The fast Much like server virtualization, virtualization growth of computer users who roam from desktops involves separating the physical one PC to another has led companies to location of a client device from its logical provide access to the user’s desktop from interface. In practical terms, desktop any computer in the workplace, detaching virtualization allows end users to access all of the user from the physical PC. Users are also their data and applications without being tied increasing their use of personal technology down to a specific hardware device. It also at home. This increase leads them to expect allows IT departments to reduce management similar personal configurations and and support costs, along with capital expenses technological freedoms in the workplace. for desktop hardware. Additionally, users are now more likely to use their own devices to access corporate applications, such as corporate email, from Desktop Virtualization: Introduction their personal mobile phones. Companies are increasingly turning to Infrastructure virtualization is a powerful virtualization as the answer to these new trend in the industry today, but the concept challenges. Desktop virtualization is the act of of virtualization has been around for many separating the different computing layers and years. Virtualization technology has been storing some or all of them in a data center. pursued by vendors as a framework to divide Through virtualization, employees can access the resources of a computer into multiple their applications and data safely over a execution environments using a variety of network and the risk of data loss is minimized. hardware and software abstraction On the IT side, virtualization accelerates techniques, resulting in the separation of deployment of new capabilities without the logical interface from the physical needing to acquire new hardware and machine. Virtualization originated in the configure components. It also reduces 1960s as a technique to optimize the use of application testing requirements and very expensive and relatively scarce compatibility issues while simplifying disaster computing resources. recovery and compliance. Desktop virtualization offers a way to Further, over the past few years, businesses extend the benefits of virtualization – better have simplified their data center management performance, lower TCO, higher security via server virtualization technologies and and greater flexibility – to the full desktop. achieved enormous cost benefits in the Each desktop is supported by a physical PC process. Now, new advances in virtualization Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 2. and more availability of broadband access the local storage of remote client; thus, when enable companies to do the same with users work from their remote desktop client, enterprise desktops by providing the tools all of the programs, applications, processes, necessary to rearrange how PC components and data used are kept and run centrally, interact and to choose where those allowing users to access their desktops on any components reside. capable device, such as a traditional personal computer, notebook computer, smart phone, or thin client. Desktop Virtualization The desktop virtualization model allows the “Desktop virtualization” is a term used for a use of virtual machines to let multiple new approach to the provisioning, delivery, network subscribers maintain individualized and management of user desktops in the desktops on a single, centrally located enterprise. The main principle behind this computer or server. The central machine may new approach is leveraging existing and be at a residence, business, or data center. well-proven virtualization technologies to Users may be geographically scattered, but all virtualize not only servers but also user may be connected to the central machine by a desktops (the workstations). local area network, wide area network, or via the public Internet. Desktop virtualization replaces the traditional workstation/laptop model where Desktop virtualization offers advantages over users run all their applications and store the traditional model, in which every data on their desktop devices. Instead, the computer operates as a completely self- entire desktop experience will be executed contained unit with its own operating system, in datacenter servers. Although, in theory, peripherals and application programs. Overall the user experience should nearly be the expenses are reduced because resources can same. Think of the old be shared and allocated mainframe days when to users on an as-needed there was a huge central basis. The integrity of processing unit and users user information is had thin terminals (monitor, improved because all keyboard, and mouse) with data is maintained and almost no processing power. backed up in the data The user’s terminal was center. Conflicts in just a way to send output software are minimized to the user and to send by reducing the total input to the processing number of programs server. stored on any given machine. The diagram on the right illustrates this principle in a simplified view: Despite the sharing of resources, all users can customize and modify Desktop virtualization is the concept of their desktops to meet their specific needs. In separating a personal computer desktop this way, desktop virtualization offers environment from the physical machine improved flexibility compared with the through a client-server computing model. simpler client/server paradigm. The resulting "virtualized" desktop is stored on a remote central server, instead of on Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 3. Limitations of desktop virtualization include desktop instance, and a virtualization engine potential security risks if the network is not to create the desktops and finally, the properly managed, some loss of user autonomy and privacy, challenges in setting up and maintaining drivers for printers and other peripherals, difficulty in running certain complex applications such as multimedia and problems keeping IP addresses on users' virtual machines matched with those at the datacenter. Types of Desktop Virtualization management tools to manage the virtualization. There are two main variants of desktop virtualization: VDI Components Hosted desktop virtualization: This is when End User Access a server located in a data center hosts VDI changes the way the user accesses his or virtual machines. Users connect to the server via connection brokers and receive her desktop. Most users are not as technical as the typical administrator, so it is important their user interface via standard protocols, such as Remote Desktop Protocol. VMware to make the transition straightforward. Ideally Inc. is among the leaders in this market. using the VDI technology must be as easy as or easier than it was to use a dedicated Other vendors include Citrix Systems Inc., workstation or laptop. It is possible to use Virtual Iron Software Inc., and Qumranet Inc. Terminal Services or other remote access protocols on a regular PC, but many Client virtualization: In this model, “hyper organizations decide to deploy thin client visor” software installed on the client device allows one desktop to run multiple solutions to make things simple for its end operating systems. Top vendors in this users. There are several choices for thin clients, Wyse, Neoware and Computer Labs market include VMware Inc., Microsoft Corp., are some examples of thin client offerings. Sentillion Inc., and Parallels Inc. The thin client works with a hardware monitor. It is a very thin OS that boots and manages How to achieve Desktop interaction with one of many remote Virtualization? connectivity technologies. Some thin clients come pre-packaged with a connection broker. Virtual Desktop Infrastructure [VDI] VDI is an integrated solution of hardware, software and management tools to provide a Connection Broker replacement for standard desktop The simple purpose of the connection broker deployments. In the simplest terms, VDI is to manage the end user connections with places user desktops on a centralized server. the virtualized desktops. In smaller There are five components that comprise installations, a connection broker isn’t the VDI solution. In order of user to absolutely necessary; however in installations centralized server these are: the end user in excess of 100 users, it is essential. Some access, a connection broker that manages examples of connection brokers are Provision end user to server connections, a virtualized Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 4. Networks Remote Desktop Broker and Leo- many laptops and workstations are only stream Virtual Desktop Connection Broker. backed up piecemeal, and instigated by the end-user, if at all. The server could Virtualized Desktop and Virtualization also be a highly reliable and redundant Engine configuration with high RAID and SAN The last important component of the VDI configurations to ensure availability and solution is the management toolset used to data access. deploy the virtual desktops. It’s critical to • Data is secure and is only accessed by the have a good management toolset to end-user. For example, there have been accompany the deployment. Software and instances of laptops with highly secure OS patches must be simple and controllable, customer or government data that has while desktops need to be simple to create been lost by employees. and modeled to provide a consistent desktop • Creating a desktop for a new user can be to users. done with only a couple of clicks and in less than two minutes. VDI is a new technology that gives IT • Freeing IT staff from many of the mundane departments some choice and control over and time consuming tasks of managing and how to manage their exploding desktop maintaining the desktop computing infrastructure. With a set of components, infrastructure. deploying a VDI solution can be an effective way to centrally manage and control desktop instances and delivery. The Benefits of Desktop Virtualization Why Consider a VDI Deployment? Unlike server virtualization, which got its VDI is moving the computing from the end- foothold in many organizations as a way to user to a centralized location. This is a consolidate servers, desktop virtualization dramatic change in any organization. doesn’t aim to reduce the number of PCs. By separating physical machines from their The main benefits of VDI include: logical interfaces, desktop virtualization aims • Centralized software management is to reduce the headaches and complexity much simpler and more cost effective for associated with deploying and maintaining the IT organization. client devices, which ultimately helps IT • OS and application patches can be done departments reduce desktop management quickly, reliably and managed centrally. costs. • Increased resource efficiencies- centralizing the processing onto a server Hosted Desktop Benefits ensure that resources are used fully and efficiently. Some desktops may only use In the hosted desktop virtualization model, a small percentage of processing data and applications run on servers in the capability, while others constantly data center and are essentially streamed to exceed processing capabilities. clients. That leads to greater security, because data and applications reside on • Data security- Data backups can be physically secure servers rather than on more completed easily and quickly without easily compromised client devices. Also, user interruption. Typically laptop or transferring much of the desktop processing workstation backups would be done while workload from client devices to the data the end-user was using the system, center enables IT departments to reduce wear slowing processing and detracting from the end-user productivity. As a result, Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 5. and tear on client hardware and thereby newer systems. A company that uses a extend its life span. homegrown application incompatible with Windows Vista, for example, no longer has to In addition, hosted desktops enable IT rewrite the software before upgrading to departments to improve support. With Microsoft’s latest operating system. Using traditional desktop computing, the IT client virtualization, the company can simply department must dispatch a technician run the application on its Windows Vista PCs every time a client device won’t start inside a Windows XP-based virtual machine. properly. With virtual hosted desktops, Client virtualization is also an ideal model for however, a technician can rebuild the entire organizations that allow employees to use operating system without ever setting foot their laptops for both work and personal use. outside the data center, and have the end IT departments can create different corporate user up and running in minutes. That means and personal images on separate virtual increased productivity for IT employees and machines, and impose stringent security end users alike. controls only on the corporate image. That enables companies to remain in compliance Moreover, unlike “dumb” terminals that with government data privacy regulations deliver the same plain vanilla computing while still giving employees the freedom to experience to everyone, virtual hosted use their computers for personal tasks as they desktops support customization. Just like a wish. regular PC, virtual machines reflect users’ personal operating system and application settings. They can also store personalized screen savers and digital music collections. Challenges of Desktop Virtualization Client Virtualization Benefits As with any technology, desktop virtualization doesn’t come without trade-offs. For The client virtualization model of desktop organizations considering hosted desktops, virtualization delivers equally compelling client virtualization, or a combination of the benefits. For instance, IT departments can two, it’s necessary to first understand desktop use client virtualization to isolate virtualization’s limitations. confidential data and applications within discrete virtual machines. That helps protect the data from hackers if they Hosted Desktop Virtualization Challenges compromise a client device’s operating • Most networks aren’t powerful enough to system. Similarly, IT administrators can deliver rich graphics, such as those offered assign different security restrictions to by the aero interface in Windows Vista, to virtual machines based on the sensitivity of a virtual hosted desktop. the data they contain. For example, they can configure some virtual machines to bar • Virtual hosted desktops are server-based and delivered to end users over the users from copying data onto thumb drives and other portable storage devices, while network. If the network goes down, configuring other virtual machines more therefore, users will be unable to access permissively. their desktops. For end users, client virtualization means • Virtual hosted desktops require significant greater flexibility, since they can run bandwidth, and the ratio of users to multiple operating systems and thereby servers is not as high as in other client accommodate both legacy applications and computing models. As a result, some Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 6. organizations may need to make costly multiple virtual test machines with multiple upgrades to their servers, storage, and different operating systems running on one network infrastructure before rolling out physical desktop. Employees who need to desktop virtualization. work with applications on incompatible • End users may experience latency when platforms can also benefit from client operating their virtual desktops. Remote virtualization, as can contract workers who workers in particular may experience need to access a customer’s network through poor performance if their virtual hosted their own PCs. IT departments can simply desktops are delivered across a wide create virtual desktops for them with all the area network. applications and data they require. Accessing that hosted desktop through a virtual machine The best way to address these challenges is allows contractors to keep the customer’s to deploy hosted desktops only to applications and data separate from their own. appropriate users. Traditional target users for virtual hosted desktops are workers who use their computers for very specific tasks Benefits of virtual desktop computing that are not knowledge-intensive, such as employees in call centers and administrative • Maintain the Windows desktops and builds workers. Remote and mobile workers can be from one central location good fits for hosted desktop virtualization o No need to visit physical machines to install or update software or change too, provided they have access to high- configuration. speed network connections. • Support is improved by shadowing sessions Client Virtualization Challenges and watching the user’s steps o Use RDP tools or the VMware server console Client virtualization has its challenges as to follow what the user is doing when giving support remotely, or take control of well. For one, running multiple virtual the machine. machines simultaneously requires more powerful client hardware, particularly in • Easy recovery, replacement of machines. terms of processing and memory. As a result, o Blue screen, dead OS, no problem! Simply organizations must often make up-front delete the virtual machine and replace it in minutes rather than hours. No need to investments to get their desktops “virtual physically collect a machine. machine ready.” Additionally, end users sometimes experience degraded • Centralized control, shutdown or restart performance when running applications not machines remotely native to their client device’s base o If a user changes department, simply change the connection profile for that user, operating system. For example, some Apple allowing them to access the appropriate Mac-based systems may not operate as department build Shutdown or restart a speedily on a Microsoft Windows-based PC, client machine remotely even when they’re run in a Mac-based virtual machine. • Manage your pool of machines o Add or remove virtual desktops as needed in a few minutes. No need to wait for To overcome these challenges, organizations hardware to arrive, when staff changes should carefully assess where implementing occur. client virtualization makes sense. Traditional use cases for this model include • Lower costs technical end users, such as software testers. o Old PCs and low cost thin clients can be used, as the processing is done by the Client virtualization enables them to have server not the client Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 7. o No difficult Terminal Server management, • Difficulty in running certain complex 3rd party utilities needed applications such as multimedia o No Terminal Server CAL costs o Reduced support and time administering • Increased downtime in the event of physical desktops. network failures • Complexity and high costs of VDI Limitations of Desktop Virtualization deployment and management include: Notable providers: • Potential security risks if the network is not properly managed • VMware View • Some loss of user autonomy and • Citrix XEN Desktop privacy • Wyse • Challenges in setting up and • Microsoft Remote Desktop Services maintaining drivers for printers and and/or Terminal Services other peripherals CONCLUSION Augmenting traditional PCs with a powerful and cost-effective thin computing alternative makes good business sense for many organizations. Particularly when budgets are tight, IT resources are scarce, and security is a concern, consolidating desktop environments in the data center is a solution well worth considering. Using virtualization technology in the server room and clients on the desktop, companies reduce maintenance and support costs while users continue to enjoy the same desktop experience as with PCs. With this approach, organizations can deliver secure, isolated desktops that are always on, accessible from anywhere and easy to set up and maintain. Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500
  • 8. Corporate Headquarters Author Intelligroup, Inc. 5 Independence Way, Shankar Kolusu [shankarko@intelligroup.com] Princeton, NJ 08540. Systems Engineer – Citrix & Virtualization Tel: 646-810-7400 Fax: 646-810-7500 Intelligroup Asia Private Limited, 5th Floor, iLabs, Plot 18, Software Units Layout, Madhapur Hyderabad 500 081, India. Tel: +91-40-30483456 Fax: +91-40-30483200 Intelligroup Asia Pvt. Ltd., Office No. 334, BC-3, RAKFTZ, PO Box 10559, Ras Al Khaima, UAE Intelligroup Japan Co.,Ltd. Higashi Nihonbashi Green Bldg. Annex 10F, 2-8-5 Higashi Nihonbashi, Chuo-ku, Tokyo, 103-0004 Japan About Intelligroup Tel: +81-3-5825-8025 Intelligroup is a strategic partner to the Fax: +81-3-5825-8026 world’s largest companies. Its proven onsite/offshore delivery model has enabled Intelligroup Nordic A/S hundreds of customers to accelerate results Rugaardsvej 46C and reduce costs up to 50%. With in-depth 5000 Odense C expertise in industry-specific enterprise Denmark Tel: +45-70-25-10-20 solutions, Intelligroup has earned a reputation Fax: +45-70-25-10-21 for consistently exceeding client expectations. Intelligroup develops implements and supports IT solutions for some of the largest U.S. school Intelligroup Europe Limited Suites 1 & 2 systems and global corporations including GE, Challenge House Hershey, Abbott Labs, Eastman Chemical, Sherwood Drive Hitachi and Kimball International. Bletchley Milton Keynes For more information, please visit our website MK3 6DP at www.intelligroup.com Proprietary, Intelligroup Inc. Visit us @ www.intelligroup.com Intelligroup, Inc., 5 Independence Way, Princeton, NJ 08540. Tel: 646-810-7400, Fax: 646-810-7500

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