Citrix XenDesktop: Desktop Virtualization For All

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Citrix XenDesktop with FlexCast technologyWhite PaperCitrix XenDesktop: DesktopVirtualization For

Today’s organizations encompass a diverse range of users, from road warriorsusing laptops and mobile devices, to power users working with demandinghigh-end applications, to task workers performing standard, relatively predictableprocesses. No one-size-fits-all approach to desktop virtualization can meetall the different requirements of these users. The challenge for IT is to deliverthe right kind of desktop and applications in the right way for each user type,while addressing IT priorities such as cost, security and ease of management.In the past, this would have required the implementation of multiple solutionsfrom multiple vendors—a prohibitively complex and unmanageable strategy.Today, while other solution vendors each continue to support only one ortwo types of virtual desktop and application, Citrix supports every desktopand application virtualization architecture and every type of user througha single, integrated solution: Citrix XenDesktop with its unique CitrixFlexCast technology.Understanding your optionsOrganizations usually need to use a combination of approaches to meetthe requirements of users and IT. To create your own desktop virtualizationstrategy, start by evaluating the types of workers you have and defining yourpriorities for flexibility, agility, mobility, ease of management, cost, userexperience and security. Your ideal strategy may incorporate several differentdesktop and application delivery models to meet the needs of all of theworkers in your environment.At a high level, your strategy will depend on one or more of these service types: Server-based virtual desktops are unmatched for their ease ofendpoint device management. With this approach, you keep theoperating system, applications and data within the datacenter,where you execute them primarily using server resources. Thoughthis approach typically requires additional server infrastructure, italso enables you to use low-cost, low-maintenance, and easy-tomanage client devices, such as zero clients or even re-purposed PCs. Client-side virtual desktops enable full PC-like performance whilereducing the need for additional server investments. IT creates,manages, and updates these in the datacenter, then either streamsthem for local execution or delivers them as client-side virtualmachines (VMs) to the device. The desktop OS and applicationsexecute on the local device, enabling the high performance thatcharacterizes this type of virtual desktop. On-demand applications can reduce application managementcosts by up to 50 percent, improve application and data security,accelerate application delivery and can help you optimize deliveryfor any user, anywhere, on any device. This centralized single-instancemanagement approach enables you to create a single applicationimage in the datacenter, then deliver it in multiple ways to any numberof devices, eliminating the need to install and maintain a separateinstance of the application for each device.2

Citrix XenDesktop with FlexCast technologyWhite PaperThe full spectrum of virtualization scenariosTo help you meet the computing requirements of every type of user in theorganization, FlexCast enables a variety of desktop and application deliveryapproaches: Hosted shared desktops Hosted VDI desktops Streamed VHD desktops Local virtual machine (VM) desktops On-demand applicationsIn the following sections, we will take a closer look at these delivery scenariosand discuss which FlexCast variants are best suited for which types of userand application.Hosted shared desktopThe least expensive option with the highest ROI of any server-based virtualdesktop scenario, the hosted shared desktop model supports up to 500 usersper server while providing a high-definition user experience. This FlexCasttechnology, just like traditional server-based computing, consists of multipleuser sessions sharing a single, locked-down Windows Server environmentrunning in the datacenter and accessing a core set of applications on-demand.Highly efficient and tightly controlled, but strictly limited in user flexibility,this option is appropriate for task workers who perform a set of well-definedtasks and do not require personalization for optimal productivity.Benefits: Secure, centralized desktop, application and data management Wide selection of client hardware (PCs, thin clients, mobile clients,handhelds) Low total cost of ownership (TCO)3

Hosted VDI desktopThis server-based virtual desktop model combines the benefits of centralizedmanagement and security with a personalized user experience. Multiple userswho share the same device can each log into their own individual environmentand get the look and feel of their own virtual desktop. The classic architecturefor virtualized desktop infrastructure (VDI), this FlexCast technology movesthe traditional desktop environment to the datacenter, where a virtual machineon a server runs it. Applications and data never leave the datacenter, helpingyou maintain high security while allowing users to access the same consistentdesktops, applications, data and customizations through any device.Hosted VDI desktops enable you to provide secure, easily controllable accessfor external contractors, third-party collaborators and other provisional teammembers in addition to internal users. This model can generally support upto 150 desktops per server.Benefits: Secure, centralized desktop, application and data management Individual desktop environments available for each user Customizable or locked-down desktops depending on corporaterequirementsStreamed VHD desktopThis FlexCast technology is an easy, low-cost entry point for desktopvirtualization and an excellent choice for shared workstation environments.Because it leverages the local processing power of rich clients with minimalserver resources, a single server can support thousands of users, minimizingdatacenter overhead. You create, update and maintain desktops in thedatacenter, then stream them to local PCs for execution. Centralized singleimage management means that a single, standard desktop image can supportmany users, simplifying management and further reducing costs. Users accessa fresh, up-to-date desktop each time they log on. If you wish, you can manageuser personalization separately from this image and apply it on demand.4

Citrix XenDesktop with FlexCast technologyWhite PaperStreamed VHD desktops are best for computer labs and other sharedworkstation environments where management requirements around OSand application re-provisioning are a daunting task. This technologydelivers a new desktop image every time a user logs in and is best suitedfor LAN workstations and PCs.Benefits: Simplified management for frequently changing workstationconfigurations Centralized desktop, application and data management with localexecution Dedicated compute resourcesLocal VM desktopLocal VM-based desktops extend the benefits of desktop virtualization tomobile users while increasing flexibility. With this client-side virtual desktopmodel, you can create, manage, and update desktops in the datacenter, thendeliver them as a client-side VM to the endpoint device. This enables fulloffline use of a desktop while maintaining the advantages of centralized,single-image management. When the offline desktop reconnects to the network,it synchronizes any updates with the datacenter. At the same time, users canrun multiple personal and business desktops on the same laptop with highperformance, complete isolation between personal and business applicationsand strict security. IT can also create multiple predefined VMs and makethem available for download to appropriate users.Local VM desktops are best for mobile workers who cannot be guaranteedan internet connection, but still want the benefits of a centrally managed andbacked-up desktop. Workers who need to run multiple desktops on a singledevice—either through the consolidation of multiple business desktops orbecause of the desire to run a business and personal machine on one device—will also get value from this technology.Benefits: Operation of multiple virtual machines on the same endpointhardware Local operation in a secure, centrally managed environment Support for disconnected use5

On-demand applicationsThe on-demand application technology in FlexCast is both an ideal startingpoint for organizations new to desktop virtualization and a great additionto any desktop delivery solution as it can deliver any type of application toany user, regardless of the type of desktop they are using. You can centralizeand manage Windows applications in the datacenter, hosting them either onmulti-user terminal servers or virtual machines and instantly delivering themas a service to physical and virtual desktops in the way that best meets theuser’s needs and IT’s administrative requirements. You can integrate Weband SaaS applications seamlessly into a single interface, so users only needto log on once to have secure access to all their applications.This technology offers many of the ROI and management benefits ofvirtualization with minimal setup costs. Users can access applications anddata optimized for each user device, network and location. They can getapplications via high-speed protocol for online use, and support for offlineuse by streaming applications via Citrix application virtualization or MicrosoftApp-V directly to the endpoint. Users can self-provision new applications andapply individual preferences to maximize productivity. Efficient, centralizedsingle-image management reduces TCO, since a single copy of each applicationcan support thousands of users.Benefits: Dynamic delivery of applications—hosted or streamed—to eachuser and device Secure, centralized data management with granular access control Self-service enterprise app store6

Citrix XenDesktop with FlexCast technologyWhite PaperWith desktop virtualization, one size does not fit allDifferent types of workers across the enterprise need different types of desktops.Some require simplicity and standardization, while others require highperformance and personalization. With FlexCast, your IT group can delivervirtual desktops and applications tailored to meet the performance, securityand flexibility requirements of each individual user. For example, a knowledgeworker using a Windows 7 hosted VDI desktop may struggle to access anapplication previously compatible with Windows XP. In this case, she canaccess these incompatible applications as hosted applications, delivered ondemand as a service. In this way, IT can ensure that each user can access theright desktops and applications to meet their needs without being limitedby the constraints of a single delivery technology. At the same time, thisapproach enables IT to meet its own requirements for cost-effectiveness,manageability and security.SummaryDifferent types of workers across the enterprise need different typesof desktops. Some require simplicity and standardization, while othersrequire high performance and personalization. XenDesktop can meetthese requirements in a single solution with our unique FlexCast delivery technology. With FlexCast , IT can deliver every type of virtualdesktop— each specifically tailored to meet the performance, security andflexibility requirements of each individual user.Compared to traditional distributed PCs with locally installed applications,desktop virtualization improves manageability, flexibility, security, compliance,and costs associated with providing and maintaining the desktop infrastructure.With its FlexCast technology, Citrix XenDesktop is the only solution that offersall of the desktop and application delivery technologies to meet the wideranging needs of all IT managers, business leaders, financial controllers andusers equally well. To learn more about the desktop virtualization usingXenDesktop with FlexCast technology, please visit

Worldwide HeadquartersCitrix Systems, Inc.851 West Cypress Creek RoadFort Lauderdale, FL 33309, USAT 1 800 393 1888T 1 954 267 3000AmericasCitrix Silicon Valley4988 Great America ParkwaySanta Clara, CA 95054, USAT 1 408 790 8000EuropeCitrix Systems International GmbHRheinweg 98200 Schaffhausen, SwitzerlandT 41 52 635 7700Asia PacificCitrix Systems Hong Kong Ltd.Suite 6301-10, 63rd FloorOne Island East18 Westland RoadIsland East, Hong Kong, ChinaT 852 2100 5000Citrix Online Division6500 Hollister AvenueGoleta, CA 93117, USAT 1 805 690 6400www.citrix.comAbout CitrixCitrix Systems, Inc. (NASDAQ:CTXS) is a leading provider of virtual computing solutions that help people work and play fromanywhere on any device. More than 230,000 enterprises rely on Citrix to create better ways for people, IT and business to workthrough virtual meetings, desktops and datacenters. Citrix virtualization, networking and cloud solutions deliver over 100 millioncorporate desktops and touch 75 percent of Internet users each day. Citrix partners with over 10,000 companies in 100 countries.Annual revenue in 2010 was 1.87 billion. 2011 Citrix Systems, Inc. All rights reserved. Citrix , XenDesktop and FlexCast are trademarks or registered trademarks ofCitrix Systems, Inc. and/or one or more of its subsidiaries, and may be registered in the U.S. Patent and Trademark Office and in othercountries. All other trademarks and registered trademarks are property of their respective owners.0611/PDF

Citrix Online Division 6500 Hollister Avenue Goleta, CA 93117, USA T 1 805 690 6400 About Citrix Citrix Systems, Inc. (NASDAQ:CTXS) is a leading provider of virtual computing solutions that help people work and play from anywhere on any device. More than 230,000 enterprises rely on Citrix to create better ways for people, IT and .

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