3. Notes accompany this presentation. Please select Notes Page view. These materials can be reproduced only with written approval from Gartner. Such approvals must be requested via e-mail: vendor.relations@gartner.com. Gartner is a registered trademark of Gartner, Inc. or its affiliates. Client Computing Architectures: Many Choices to Solve Many Problems Mark Margevicius

4. Deficiencies in Traditional PCs Introduce Opportunities and Architectures Desktop and laptop PCs have valuable attributes; but, in many ways, have shifted from strategic to tactical for many organizations Do PCs offer "There has to be a better way." "Not another PC refresh." "PCs are such a pain." "PCs are waaaaay too costly." Do these sound familiar?

5. 20102010 Virtual Everything: Operating System Bubbles and Application Containers Hardware Operating System (OS) The application is installed in a container with a copy of OS resources Virtualization decouples each layer from the layer below Virtualization Layer Application The virtualization layer runs on the OS to create a standardized interface for application installation The OS is installed in a virtual machine A thin virtualization layer runs on the hardware to create a standardized interface for OS installation Mainstream for PC deployments 20092009

6. New Packaging Options: Separating Users, Hardware and Bubbles Virtual Machines Hosted on Servers Architectural equivalent of the blade PC Full "thick-client" image, thin-client delivery model Portable Personalities Your preferred environment, any machine, any location Carry it with you, store it on the network Bubbles of various sizes: some with OS, some without

7. Intel's Virtualization Technology (VT) and AMD's AMD-V available Technical challenges with I/O being addressed New privilege levels, hardware partitioning and hardware policy enforcement Virtualization becomes more efficient, more flexible and more reliable Requires software support Hardware-Assisted Virtualization: Faster and More Robust New software emerging; additional hardware improvements Hypervisor Different CPU Privilege Levels Guest OS Applications Virtual Machine Virtual Drivers Virtual Machine Monitor

8. Primary Partition The Operating System Unbundled: Embedded Complexity Begins to Recede Mainstream for new PCs from 2010 Virtual Machine Hardware Hypervisor Service Appliance Virtual Machine Applications Load order= Standard OS component Applications

9. Client Computing Now Has Many Homes

10. Applications Can Be Delivered Differently as Well

11. Extreme Spectrums of Client Computing Architectures Limited Functionality Low Cost PC Hardware PC OS Preso Layer Data Applications Data LAN/ WAN PCs Hardware OS ICA/RDP Server WTS/Citrix Data LAN/ WAN SBC Applications LAN/ WAN Web Browser OS Hardware Applications Web Server Applications Data Different architectures can coexist More Complex Higher TCO Highly Flexible More Secure Lower TCO Rigid Design Thin Client LAN/ WAN Data VMM Hosted VMs VM Thin Client RDP Data Applications Data LAN/ WAN Blade PCs PC OS PC Hardware PC OS Data LAN/ WAN Streaming PC OS Applications

12. Blade-Based PCs — Niche Solutions Dedicated 1-to-1 PC-to-user ratios Degrees of customization avail No degradation in performance Offers failover and redundancy High capital costs (1.5x to 2.5x more than traditional desktop PCs) Better economics if used as a pooled resource Better client-side manageability Tends to be fairly vertical; often found on Wall Street, in hospitals and network operation centers Proprietary solutions Blade-Based PCs

13. Server-Based Computing — Mainstream Alternative Server-Based Computing Applications are shared among users 50-80 users (typical) per server Applications are published to users Lower TCO than PCs (although capital costs are higher) Not for all apps./users Performance issues with heavy computation or graphics-based applications Application testing and remediation highly recommended Large ecosystem of vendors Battle-hardened and scaleable ICA RDP

14. Hosted Virtual Desktops — New Twist on Remote Desktops Source: VMWare Users connect to server using RDP Virtual instances of Windows XP/Vista running on servers Each server supports 10-20 users Applications are the same as with local PCs Provides for central management Offers device/user independence Interest from remote/teleworkers Third-party tools still evolving VMWare, Citrix, Virtual Iron, IBM, HP, Fujitsu, NEC, just to name a few!

15. Which Client Architectures work best? Blades/Hosted Desktops Blended desktop/server configuration Identical PC application functionality Requires server/network infrastructure build-outs Remote access Application Streaming Centralization Application isolation Rich application support Remote access Still maturing Server-Based Computing Homogonous environments Well-behaved applications Rapid deployment needs Security Remote access Lowest TCO Most restrictive Traditional PCs Performance-driven applications Multimedia/graphics Legacy use Mobility (laptops) Most flexible Highest TCO Local-execution Server-execution

16. From Niche to Default: A PC Virtualization Technology Roadmap 20072008 2009 2010 Viability for future deployments Viable now Application virtualization, hosted VMs on servers, hardware virtualization and rogue user images in VMs Application virtualization PC hypervisors Hardware security Application streaming New user images in VMs by default OS streaming Software appliances Mainstream deployment of user images in VMs Hosted VMs VMs for technical and niche users only VMs for everyone