White Paper. Enhanced Branch Office Productivity and WAN Bandwidth Savings with Microsoft BranchCache Version 2

89 Fifth Avenue, 7th Floor New York, NY 10003 www.theedison.com 212.367.7400 White Paper Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Version 2

Printed in the United States of America. Copyright 2012 Edison Group, Inc. New York. Edison Group offers no warranty either expressed or implied on the information contained herein and shall be held harmless for errors resulting from its use. All products are trademarks of their respective owners. First Publication: March 2011, Version 2: August 2011 Produced by: Barry Cohen, Sr. Analyst and Editor-in-Chief; Manish Bhardwaj, Lead Analyst; Kelly Strand Anderson, Sr. Analyst;

Table of Contents Executive Summary... 2 Introduction... 8 Objective... 8 Audience... 8 Contents of this Report... 8 The Remote Office Dilemma... 8 Testing BranchCache Performance... 9 Test Results... 9 Conclusions and Recommendations... 9 Appendices... 9 The Remote Office Dilemma... 10 The Dilemma... 10 The BranchCache Solution... 11 Testing BranchCache Performance... 13 Test Methodology... 13 Test Scenarios... 14 Test Data... 18 Laboratory Configuration... 18 At Emulated Headquarters... 18 App-V Configuration... 19 Remote Office... 19 Test Results... 21 Summary of Results... 21 Scenarios... 26 Test Scenario 1 CIFS/SMB File Accesses... 26 Test Scenario 2 HTTP File Downloads... 28 Test Scenario 3 SCCM Application Package Download... 33 Test Scenario 4 MOSS 2007 File Access... 39 Test Scenario 5 App-V... 42 Conclusions and Recommendations... 48 Appendices... 50 Test Environment... 50 Test Results... 52 CIFS/SMB Test Results... 53 Results Summary... 53 Details... 54 HTTP Test Results... 59

Results Summary... 59 Details... 60 MOSS2007 Test Results... 64 Results Summary... 64 Details... 66 SCCM Test Results... 69 Results Summary... 69 Details... 71 App-V results... 75 Results Summary... 75 Details... 76

Executive Summary Organizations seeking to lower operating expenses are investigating technology solutions that can directly lower costs and improve productivity. One area in which these organizations are seeking solutions is in the IT infrastructure supporting remote or branch offices. Remote office workers frequently and repeatedly download the same files from the central office. Increasingly, these files are composed not only of text but also of mixed content types that include photographs, illustrations, animations, and videos. Such documents are much larger than in the past, demanding very high Wide Area Network bandwidth utilization levels and slowing file access with adverse impact on productivity. Application virtualization allows organizations to streamline the deployment of software to the end user. Applications virtualized with App-V can be deployed and launched by end users at a much quicker rate than traditional complete local deployments. Deploying large modern programs to remote offices consumes large amounts of bandwidth and is very time-consuming, making the practice expensive. With the release of Windows 7, Microsoft has delivered BranchCache, a solution to address the remote office challenge. Working in conjunction with Windows Server 2008 R2, Windows 7 clients with BranchCache capability enabled can expect to see significant performance improvements when downloading files from the central office. The concept behind BranchCache is straightforward: when BranchCache is enabled, a copy of data accessed from an Intranet web, SharePoint, or file server over the WAN is cached locally in the branch office. When another client on the same network in the branch office requests the same file, the file is transferred from the local cache rather than from across the WAN. BranchCache improves performance when copying files between central and remote or branch offices using the SMB, HTTP, and HTTPS protocols. Microsoft commissioned Edison Group to examine WAN bandwidth savings with BranchCache. In order to quantify the extent of the performance improvement that organizations can expect, Edison analysts created a set of use case scenarios and ran comparison tests over a range of typical WAN network types. These tests compared the performance of Windows 7 clients with BranchCache capability enabled against client PCs running the older Windows operating systems Windows XP and Windows Vista. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 2

Edison s results showed savings that, in many cases, exceeded our expectations. The results were consistent across all the network bandwidth conditions and for all the operating systems and BranchCache settings. These savings included: CIFS/SMB file downloads for a PowerPoint presentation were as much as 69 percent faster while utilizing an average of up to 59 percent less bandwidth than with Windows Vista or Windows XP. User download times with the HTTP protocol were 63 percent faster than with Windows Vista and Windows XP, while requiring 49 percent less Wide Area Network bandwidth. Downloading an application or patch using Microsoft System Center Configuration Manager (SCCM) and the BITS protocol was 76 to 79 percent faster and utilized 53 to 58 percent less bandwidth. When transferring a file from a Microsoft Office SharePoint Server 2007 (MOSS 2007), clients running Windows 7 with BranchCache were 65 to 68 percent faster and utilized 66 percent less bandwidth than Windows XP or Windows Vista. Edison testing shows that BranchCache greatly accelerates App-V performance. It is 24 to 34 percent faster and utilizes 33 to 37 percent less bandwidth than App-V. These savings in time and bandwidth are especially important to those people responsible for application deployments and updates. The following chart (Figure 1, Page 4) illustrates the bandwidth savings for the three operating systems tested across four business use scenarios. A second chart (Figure 2, Page 5) illustrates the bandwidth savings for the three operating systems for the App-V business use scenario. These levels of bandwidth savings can have a direct and immediate effect on operating expenses, especially in organizations where WAN costs are growing quickly. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 3

Figure 1 - BranchCache Utilization Savings Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 4

Avergage MB BranchCache Savings Utilization App-V 70.00 60.00 50.00 40.00 30.00 20.00 W7 w. BC Enabled Windows Vista Windows XP 10.00 0.00 Average Used Figure 2 - BranchCache Utilization Savings: App-V For businesses looking to improve the productivity of workers in remote offices, downloading files in less than one third the time previously required could be directly translated into greater worker productivity and job satisfaction. (See Figure 3, Page 6 for a chart illustrating potential time savings for four business use scenarios. See Figure 4, Page 7 for a chart illustrating potential time savings for the fifth business use scenario: App-V.) For many organizations, virtualizing standard applications with App-V can significantly lower provisioning costs. When run on Windows 7 with BranchCache, organizations can obtain the same App-V benefits for their branch offices that App-V offers to LAN-based implementations. While App-V does run on Windows XP and Vista, for branch offices its performance really shines on Windows 7 with BranchCache. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 5

Figure 3 - BranchCache File Savings Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 6

Average Time to Open Application BranchCache Savings Application Delivery Time App-V 600.00 500.00 400.00 300.00 200.00 W7 w. BC Enabled Windows Vista Windows XP 100.00 0.00 Average Figure 4: BranchCache Savings - Application Delivery Time: App-V Based upon the evidence of our tests, Edison believes that for some organizations, the costs of upgrading to Windows 7 can be significantly offset by bandwidth savings alone. If organizations are already contemplating PC upgrades to these remote offices, upgrading to Windows 7 with BranchCache should be considered the new standard. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 7

Introduction Objective Since the release of Windows 7 on October 22, 2009, many organizations have been testing the new operating system. Among the new features that organizations should strongly consider when making IT purchases or upgrade decisions is BranchCache. BranchCache is a new feature in Windows 7 and Windows Server 2008 R2 that enables the acceleration of file download times for users in remote offices over a variety of networks without requiring additional bandwidth or installation of accelerator appliances. Microsoft has published several documents that provide executive and technical overviews of BranchCache that are available at www.branchcache.com. This white paper does not duplicate the contents of those documents. Instead, it is intended to provide third-party validation of Microsoft s performance claims for BranchCache, while also providing some hard metrics that readers can use in determining how BranchCache can lower bandwidth costs and improve the productivity of workers in satellite offices. Audience Technically savvy business decision makers who are concerned with Wide Area Network costs and remote office productivity should read this white paper. It will also be useful for those organizations that are evaluating Windows 7 and assessing strategies for upgrading their installed base of Windows XP and Vista clients. Contents of this Report This white paper contains the following sections: The Remote Office Dilemma This section describes the effect on productivity experienced by remote workers because of long file transfer delays when accessing commonly used files or documents from a centrally located server share, web server, SharePoint Server, Configuration Management Server, or Microsoft Application Virtualization Server. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 8

Testing BranchCache Performance This section describes the test scenarios and testing methodology Edison developed and used. It includes a high-level discussion of the lab environment, the configurations, and test methodologies. Test Results This section provides a summary of our test results, showing how BranchCache affects file transfer performance within the scenarios tested. Conclusions and Recommendations This section provides Edison s analysis of the benefits of BranchCache and recommendations for implementation strategies. Appendices The appendices contain details of the test environment and methodology, as well as the test result details. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 9

The Remote Office Dilemma The Dilemma It was just a few years ago that organizations recognized the need to address the issues of server sprawl the proliferation of file and application servers across their corporate landscape. Among the first steps taken were physical consolidation of servers from distributed computer rooms and closets to more and more centralized data centers. This change has resulted in significant cost reductions, especially with the emergence of server virtualization as the ultimate consolidation tool. Consolidation success has exposed a new concern: network latency and the lower speed of Wide Area Networks (WANs) adversely affects the speed of file access to which users have been accustomed when servers that used to be just down the hall are moved across the continent. In addition, the nature of server access and the files users are downloading have changed. Where small Microsoft Word documents and Microsoft Excel spreadsheets of less than 1 MB in size once predominated, today mixed media documents containing images, movies, audio, and video are becoming more and more common. Users are also likely to access these much larger sized files via Microsoft Office SharePoint Server 2007 or other corporate websites. Another dilemma facing many organizations is addressing the expansion of a large and diverse portfolio of applications to the desktop. While restricting application choice to a narrow set of tested, approved, and locked-down applications offers an appealing benefit in reducing IT costs by limiting the breadth of applications available, this approach can frustrate users who need greater flexibility than it provides. One technique that can be used to resolve the flexibility challenge is application virtualization. Microsoft Application Virtualization (App-V) is one example of an application virtualization platform. As part of the Microsoft Desktop Optimization Pack (MDOP), App-V enables organizations to deliver applications as centrally managed virtual services. This can reduce deployment complexity, eliminate application conflicts, and simplify the Windows Desktop OS image footprint, which will speed desktop PC provisioning. App-V can deliver significant operational savings for many organizations; 1 however, an obstacle can be delivering applications to branch offices across a WAN. 1 For more information about App-V see http://www.microsoft.com/systemcenter/appv/default.mspx Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 10

Some of the advantages of consolidation can be negated due to the lower speed and higher latency of WANs and the much larger file sizes being transferred. Loading a virtualized instance of Microsoft Office over a slow WAN connection can make application virtualization an impractical option. These possibilities can require organizations to increase the bandwidth of their WAN connections (often at a very high cost), bring back local servers (thus reviving server sprawl), or invest in Wide Area Application Acceleration Appliances. This last options acceleration appliances can be beneficial where business-critical applications need acceleration, but such devices can also add significant cost as well as complexity to the management of remote offices. The BranchCache Solution Microsoft BranchCache is designed to provide the file transfer performance organizations are looking for without the need for costly WAN upgrades or additional hardware to manage. BranchCache improves performance when copying files between central and remote or branch offices using the SMB, HTTP, and HTTPS protocols. SMB is the protocol used for transferring files between shared folders on Windows networks. HTTP and HTTPS are the protocols used by web browsers and many other applications. The concept behind BranchCache is straightforward: when BranchCache is enabled, a copy of data accessed from an Intranet web, SharePoint, or file server is cached locally in the branch office. When another client on the same network in the branch office requests the same file, the file is transferred from the local cache rather than from across the WAN. BranchCache operates in two modes: Distributed Cache. In this mode, Windows 7 client computers utilize a peer-to-peer architecture. The first client to download a file caches a copy of the file and sends it directly to other clients as they request it. Hosted Cache. In this mode, content is cached to a computer on the branch network running Windows Server 2008 R2 as the Hosted Cache. Other clients needing the same content retrieve it directly from the Hosted Cache. Computers running the Hosted Cache can run the Server Core installation option of Windows 2008 R2 and can host other applications. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 11

Figure 5 illustrates these modes: Figure 5 - BranchCache modes (from Microsoft) The BranchCache caches are passive: data is only retrieved when a client requests it. This means that using BranchCache does not increase WAN utilization. Since only read requests are cached, write operations are not affected. BranchCache operations also respect security policies and technologies, such as SSL and IPsec. BranchCache requires the use of Windows 7 Ultimate or Enterprise editions on workstations and Windows Server 2008 R2 on servers. For more complete list of servers that support BranchCache, please visit: http://technet.microsoft.com/enus/library/ee307962(ws.10).aspx. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 12

Testing BranchCache Performance Edison established a lab environment for testing BranchCache performance claims that use of cached content will result in better user productivity and higher return on investment. The lab was configured to test performance over a range of use cases and test conditions. These use cases are simulations of typical branch office user interactions with central office servers. The test conditions utilize a WAN emulator to demonstrate the effect of different WAN networks. Tests compared the effect of Windows 7 with BranchCache on network bandwidth and end user download times in comparison to the older Microsoft operating systems Windows XP Professional and Windows Vista Business. These tests are a simulation designed to illustrate the benefits of using BranchCache. Real-world implementations of BranchCache will experience different results that are dependent upon many factors, including the configuration of the PCs in the branch offices, the design of the branch office LAN, the configuration and provisioning of the WAN, and many other factors. In addition, the tests in the first four scenarios were run using late beta or release candidate versions of the operating systems and some of the server products tested. In keeping with past experience with pre-released software, performance with the released versions may be better than the results Edison has documented. Test Methodology As has been previously described, BranchCache accelerates performance of the SMB, HTTP, and HTTPS protocols, offering two branch office configuration modes Distributed Cache and Hosted Cache. In order to provide use cases that illustrate these protocols, Edison defined several scenarios and devised a testing methodology that would compare the network bandwidth used and end user download times with BranchCache in Windows 7 in both modes and in comparison to the older Microsoft operating systems Windows XP Professional and Windows Vista Business. The files transferred averaged 20 MB in size. This size was chosen to require measurable and differential transfer times and bits transferred readings on the WAN emulator. Edison chose Microsoft Office 2010 as the test application for App-V in order to reflect the recent release of both App-V version 4.6 and Office 2010. In addition, upgrading to Office 2010 on top of the upgrade to Windows 7 offers an opportunity to update the IT infrastructure to support virtual applications. The file sizes for using Microsoft Office 2010 with App-V are much larger, at about 2.6 GB, than the 20 MB files downloaded in Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 13

the other BranchCache tests. This large file size intimates both the challenge presented by application virtualization across a WAN and how BranchCache can meet that challenge. Transfer time was measured with a stopwatch or the transferring application, where applicable. Test Conditions Each set of tests was performed with the WAN emulator configured to emulate three different WAN conditions. The table below (Table 1 - WAN Conditions and Use Cases, Page 14) lists and describes the three WAN conditions with real-world use cases for each condition. Table 1 - WAN Conditions and Use Cases WAN Conditions 1.5 Mbps from HQ to remote office, 384 Kbps from remote office to HQ, 40ms round trip latency.01% packet loss 1.5 Mbps, 95ms latency,.02% packet loss Real-World Use Case Regional (up to 1,500 mile) VPN over DSL line at remote office New York to Los Angeles MPLS VPN or leased line 5 Mbps, 195ms latency,.05% packet loss Transpacific MPLS link These line conditions were chosen based on AT&T MPLS service level agreements. Test Scenarios The following are the test scenarios used for this project. Each of the five scenarios, run in Hosted Cache mode and Distributed Cache mode for Windows 7 with BranchCache, was tested in a lab environment consisting of five desktop PCs. For each scenario, a brief description of the scenario and the use case context is followed by a description of the specific test methodology used. References made to specific hosts, drives, and so forth are explained in the Lab Configuration section that follows. Scenario 1 CIFS/SMB File Access When users download a file from a folder on a file server to their client PC, the Server Message Block (SMB) protocol is used. Over the years, Microsoft has added features to SMB, usually under the Common Internet File System (CIFS) name. For the purposes of this white paper, SMB and CIFS are used interchangeably. This test scenario measured the time and WAN bandwidth required for this file transfer process. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 14

A file share on the server (named Content Server) was configured to generate BranchCache hashes as per the Microsoft deployment guide. 2 Each workstation was mapped to this share as Drive N. Microsoft Office PowerPoint 2007 was opened on each workstation and the file opened. A stopwatch was used to measure the time from when the open button was clicked until the image of the first slide appeared on the screen. This process was repeated on each workstation for multiple files; the workstations were then rebooted into the next operating system, and the process repeated. Scenario 2 HTTP File Accesses The HTTP protocol is the protocol of the World Wide Web and is used by web browsers such as Internet Explorer 8 and many other applications to transfer content over the Internet. In the business world, many corporate Intranets host web servers from which files, such as presentations, forms, and so forth, are regularly transferred using the HTTP protocol. In this scenario, files to be transferred are stored on the HTTP or web server and accessed through a link on a web page. Microsoft Office SharePoint Server 2007 (MOSS) also uses the HTTP protocol. In our test scenarios, we are treating MOSS as a separate scenario. This was done for two reasons: First, since MOSS uses a database to store the files, the time required for file transfer could be affected by latency inherent in the SharePoint architecture. Second, the secure version of HTTP, HTTPS, needed to be represented, as well. Since many MOSS installations utilize HTTPS, it was felt that tests for the HTTPS protocol using MOSS was a reasonably realistic scenario. For this scenario, the Content Server was prepared as a web server for BranchCache as described in the BranchCache Early Adopter s Guide 3 and the BranchCache Deployment Guide. An index.htm file of links to the TIFF files described above was placed on the default web site of the server. The workstations were then booted into Windows XP. On each workstation a TIFF file was selected in Internet Explorer 8 and Save Target As was selected from the context menu. The file was saved to the C:\TEMP folder. The transfer times reported by Internet Explorer were used for our results. 2 Microsoft BranchCache Deployment Guide can be accessed on the Microsoft TechNet site at: http://technet.microsoft.com/en-us/library/ee649232%28ws.10%29.aspx 3 The Microsoft BranchCache Early Adopters Guide is available at http://technet.microsoft.com/en-us/library/dd637762%28ws.10%29.aspx (at the time of writing). Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 15

This process was repeated for each of the workstations in turn waiting for the transfer on each station to complete before starting the next transfer. The process was repeated with two additional files to identify anomalous results. The process was repeated with the workstations running Windows Vista and Windows 7 using the Distributed Cache mode. Finally, the BranchCache Group Policy Objects were changed to enable the Hosted Cache mode, and additional files were downloaded. The amount of data transferred in the download was recorded by resetting the counters on the Apposite Linktropy 4500 as the Save button was clicked on the workstation and noting the value at the end of the download. As there is handshaking traffic between the two networks at all times, variations in data transfer values that represent data rates below 20 Kbps are considered insignificant. Scenario 3 SCCM System Center Configuration Manager (SCCM), a member of Microsoft s System Center family of Information Technology management solutions, is a tool for the comprehensive assessment, deployment, and updating of servers, client computers, and devices across physical, virtual distributed, and mobile environments. SCCM provides a range of services to an organization. Among these is the distribution of software application packages to client computers for installation. When transferring these packages, SCCM uses a combination of the SMB protocol and the Background Intelligent Transfer Service (BITS) protocol. The BITS protocol is used to facilitate prioritized, throttled, and asynchronous transfer of files using idle network bandwidth. The BITS protocol can make use of BranchCache to accelerate file transfers, but the protocol itself is not affected by doing so. The prioritization, throttling, and other BITS features are still in effect, so the degree of acceleration experienced by BITS transfers is not as great as for the other scenarios. At the time of testing, SCCM with BITS was not supported in Hosted Cache mode, so no testing was performed for this configuration. The release version of BranchCache and the updated SCCM now support Hosted Cache mode. Edison expects that the performance gains experienced in our other tests would carry over to SCCM in Hosted Cache Mode. For this scenario, self-extracting ZIP files were each packaged as an Advertised Application via SCCM. Using the Advertised Applications Control Panel applet, each ZIP file was downloaded to the workstation and the time to download recorded. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 16

Scenario 4 MOSS 2007 Microsoft Office SharePoint Server 2007 is Microsoft s fastest growing product ever. Companies who are running Microsoft Windows Servers, Microsoft Windows clients, and Microsoft Office productivity applications are implementing SharePoint servers at an incredible pace. If a company is not yet using a full-blown MOSS 2007 server farm, chances are they are using the free Windows SharePoint Services, which provides many of the same features without the infrastructure and management overhead associated with MOSS. As tested, getting a file from a SharePoint server is the same as getting one from any web server. For this scenario, a document repository of PowerPoint.PPTX files was created, and they were downloaded as in the HTTP test. As previously described, the HTTPS protocol was used to simulate the typical use of that secure protocol. Otherwise, the test methodology was the same as for the HTTP scenario. Scenario 5 - App-V Microsoft Application Virtualization (App-V) is Microsoft's solution for centrally managing and deploying virtualized applications to the desktop. With App-V, instead of downloading and installing an entire application, only the code necessary to start the program is downloaded from a central Virtual Application Server. This download is typically 20 to 40 percent of the total application. While the application is being used, additional application code is downloaded and cached on the user's PC. When the session terminates, the application and its user preferences are cached in a file-based location on the user's PC. Subsequent uses are loaded from this cache, resulting in faster load times and low impact on the network. One challenge for organizations is that delivering a large application across the WAN via App-V can consume considerable bandwidth and time, which can add up when multiplied by all the users in a branch office who may need this application. Our testing was intended to demonstrate how adding BranchCache to the equation can decrease the amount of time it takes to deliver applications virtualized using App-V while improving user experience and lowering the operating costs associated with bandwidth usage. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 17

Test Data For the file download tests (CIFS/SMB, HTTP, SCCM, and MOSS2007) a series of 14 scanned photos in TIFF format, each 21-22.5 Mb in size, were saved on the Content server. For SMB testing, each photo was also inserted into a PowerPoint 2007.PPTX file.. The file names and sizes appear in the appendix. For the App-V tests, the application package created was Microsoft Office 2010. PowerPoint 2010 was the program launched during the test itself. Laboratory Configuration The following is the laboratory configuration for this project (see Figure 6, page 19). Whether noted explicitly below or not, all operating systems, server, and productivity applications had the latest service packs and patches applied. At Emulated Headquarters 1 Physical server (Dell 2950, dual 1.86 GHz quad core Xeon processors, 16 GB memory) Windows Server 2008 Enterprise Edition R2 w/hyper-v with the following virtual servers VM1 HQ2008R2 IIS with FTP Server, Valid HTTPS certificate Domain controller for TestDomain.local VM2 SQL08A SCCM 2007 SP2 Virtual Machine (Downloadable from Microsoft) VM3 Winn2008R2-Sharepoint Microsoft Office SharePoint Server 2007 Gateway DX4200-09 with AMD Phenom X4 9100e (1.80 GHz, quad core) processor and 4 GB memory Windows Server 2008 R2 SCCM server. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 18

1950 0 1 2 3 0 1 PowerEdge 2950 2 3 4 5 6 7 App-V Configuration 1 Physical Server (HP DL160 G5 dual 2.53 GHz quad core Xeon processors, 48 GB memory, Windows Server Enterprise Edition R2 w/hyper-v with the following virtual servers: VM1 Content Server with Windows Server 2008 R2, BranchCache-enabled, used for serving Microsoft Office 2010 Professional Plus from a folder named OF2010XP.V01 with a size of 3.2 GB. OU Named BranchCacheEnabledDistributed mode for holding Distributed modeenabled desktops, and GPO applied for Branch Cache and firewall settings. OU Named BranchCacheEnabledHostedMode for holding Hosted mode-enabled desktops and GPO applied for Branch Cache and firewall settings. Remote PC 3 Remote PC 2 Remote PC 1 Shunra WAN Emulator HQ File, web and SCCM Server Remote PC 4 10/100 Network Switch 10/100 Network Switch Remote PC 5 PowerEdge Remote Office Remote Office Server Figure 6 - Test Network Configuration Diagram Headquarters Remote Office 1 Physical Server Acer Veriton 460 G PCs. (Intel Core 2 Duo E7500 Processor, 3 GB memory 160 GB hard drive and Marvell Gigabit Ethernet.) Windows Server 2008 Enterprise Edition R2 providing Domain Controller, DHCP and hosted BranchCache services to the five workstations. App-V Physical Server (HP Proliant DL360 G6, Dual 2.53 quad core Xeon processors, 16 GB memory, 250 GB Hard Disk, Windows Server Enterprise Edition R2). Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 19

Five s Acer Veriton 460 G PCs. (Intel Core 2 Duo E7500 Processor, 3 GB memory 160 GB hard drive and Marvell Gigabit Ethernet.) Each workstation has three partitions, multiple boot configuration All configurations saved to disk images w/ghost for easy reversion Partition 1 Windows XP SP3 fully updated via Windows Update Office 2007 SP2 Partition 2 Windows 7 Office 2007 SP2 Partition 3 Windows Vista Business SP2 Office 2007 SP2 A second hard drive holds an image of the three working partitions created with Acronis True Image allowing systems to be reverted to a pristine state after each test run. For App-V testing, Microsoft Office 2010 Professional Plus was installed on all PCs and partitions instead of Microsoft Office 2007. Network The PCs are connected to Dell unmanaged 10/100 Ethernet switch. Subnet is 172.17.128.0/24 (an RFC 1918 reserved private network). Apposite Linktropy 4500 WAN Emulator which routes traffic to the headquarters network (10.16.252.0/24 also an RFC 1918 reserved net). Belkin IP-enabled KVM switch. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 20

Test Results Summary of Results Edison believes that the best way to view the results of our testing is from the perspective of how much less time and how much less WAN bandwidth in MB is required to transfer files to a branch office using BranchCache compared to a previous version of the operating system (Windows Vista or Windows XP). 4 The charts on the following pages illustrate the average BranchCache savings on file transfer time and bandwidth utilization for the four test scenarios in all test conditions. As can be seen in Figure 7 (Page 22) the download times for Windows 7 with BranchCache show consistent download times and are significantly faster than for the earlier operating systems. Figure 8 (Page 22) shows the reduced application delivery time delivered with BranchCache when compared to the earlier operating systems. 4 App-V results are presented separately for two reasons. First, the much larger file sizes for the App-V tests requires charts with different time and bandwidth scales than that used for the other scenarios. Edison felt that combining two different scales in a single chart was confusing. Second, while end-users directly experience the benefits of BranchCache when downloading files in their day-to-day work, the main benefits of the affect BranchCache has on App-V application transfers are experienced by system administrators. Presenting the App-V results separately, it was felt, would allow these different audiences to more easily focus on the performance that was most salient to their interests. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 21

Average Time to Open Application Figure 7 - BranchCache File Savings BranchCache Savings Application Delivery Time App-V 600.00 500.00 400.00 300.00 200.00 100.00 W7 w. BC Enabled Windows Vista Windows XP 0.00 Average Figure 8 - BranchCache Savings, Application Delivery Time: App-V Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 22

The bandwidth savings delivered by Windows 7 with BranchCache enabled, as seen in Figure 9 (Page 23) and Figure 10 (Page 24), are also significant, though less consistent due to the differing nature of the file transfer protocols being accelerated. 5 Figure 9 - BranchCache Utilization Savings 5 See the scenario descriptions above or the results details below for more information on how the transfer protocols in the four scenarios can affect file transfer time and bandwidth utilization. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 23

Avergage MB BranchCache Savings Utilization App-V 70.00 60.00 50.00 40.00 30.00 20.00 W7 w. BC Enabled Windows Vista Windows XP 10.00 0.00 Average Used Figure 10 - BranchCache Utilization Savings: App-V For HTTP, file download times with Windows 7 with BranchCache enabled was over 60 percent faster than Windows XP or Windows Vista. Windows 7 with BranchCache enabled required almost one-half the bandwidth than either Windows XP or Windows Vista. When file downloads were performed using MOSS 2007, the need for MOSS to access SQL Server slowed down the file downloads somewhat, but the file download using Windows 7 with BranchCache enabled still required approximately two-thirds less time and two-thirds less bandwidth than Windows XP or Windows Vista. Downloads through SCCM exhibited a 76 to 79 percent download time reduction for Windows 7 with BranchCache enabled and over a 53 to 58 percent bandwidth savings over Windows XP or Windows Vista. CIFS/SMB file download times were from 55 to 69 percent faster for Windows 7 with BranchCache enabled and utilized from 45 to 59 percent less bandwidth than Windows XP or Windows Vista. The following table (Table 2, Page 25) shows the performance in time and bandwidth summarized above. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 24

Table 2 Average Results for Scenarios HTTP MOSS SCCM SMB App-V Time Windows 7 11.50 34.20 45.86 48.52 401.96 Windows XP 107.51 108.06 189.33 158.44 541.00 Windows Vista 108.06 98.50 214.17 108.44 472.72 Windows 7 Advantage over Windows XP Windows 7 Advantage over Windows Vista 63% 68% 76% 69% 26% 63% 65% 79% 55% 15% Windows 7 11.50 7.72 13.29 9.46 50.1 Windows XP 22.53 22.80 31.71 22.97 66.48 Windows Vista 22.45 22.91 28.50 17.14 67.16 Windows 7 Advantage over Windows XP Windows 7 Advantage over Windows Vista 49% 66% 58% 59% 25% 49% 66% 53% 45% 15% Downloading and launching an application (Microsoft PowerPoint 2010), deployed with App-V had a 26 percent advantage over Windows XP and a 15 percent advantage over Windows Vista. savings were 25 percent as compared to both older operating systems (Table 3, Page 25). Table 3 Average Results for App-V Scenario App-V Time Windows 7 401.96 Windows XP 541.00 Windows Vista 472.72 Windows 7 Advantage over Windows XP 26% Windows 7 Advantage over Windows Vista 15% Windows 7 50.1 Windows XP 66.48 Windows Vista 67.16 Windows 7 Advantage over Windows XP 25% Windows 7 Advantage over Windows Vista 25% Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 25

As can be seen in Table 2 and Table 3, the effect of BranchCache on file download time is significant enough in productivity savings, but the effect on bandwidth can have the greatest effect on operational cost savings. 6 Scenarios The sections below provide summaries of the effect of Windows 7 with BranchCache enabled for each of the five test scenarios. The data upon which these summaries are based is presented in the appendices. All of the tests in these scenarios were performed using the set of test conditions described in the lab configuration section. These tests included both asymmetric and symmetric WAN emulation. Asymmetric networks are typical of those provided by DSL and cable networks. In these networks, the download speed is usually greater than the upload speeds. Since the results of BranchCache acceleration for both Hosted and Distributed cache modes were very similar and the performance of Windows XP and Windows Vista were also similar, the charts only show some of the results of the testing. This choice was made so that the charts would be easier to read. Detailed results tables can be found in the appendices. Test Scenario 1 CIFS/SMB File Accesses The CIFS/SMB File Access Test consists of file downloads initiated from within Microsoft PowerPoint 2007 for files on a network share (mounted as Drive N). The times were based upon the time required to open the file. Results The following charts show the average performance comparison between Windows 7 with BranchCache enabled versus the performance of Windows XP and Windows Vista. The Average Used chart (Figure 11, Page 27) and the Average Download Time chart (Figure 12, Page 27) show that Windows 7 with BranchCache enabled requires much less time and bandwidth than either Windows Vista or Windows XP. It should be noted that Windows Vista had improvements in CIFS/SMB protocol processing, which is shown by the better performance of Vista over XP. 6 It is important to note that when a cached file is transferred, it is the performance of the caching computer and Local Area Network that is affecting transfer time. Almost no Wide Area Network bandwidth is being used for the transfer other than that required for determining the existence and state of a previously transferred and cached file and checking credentials and access controls. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 26

Figure 12 - Average Used: CIFS/SMB Protocol (Smaller is better) Figure 12 - Average : CIFS/SMB Protocol (Smaller is better) The two charts on the following pages show the results of acceleration on CIFS/SMB file downloads. The charts show that downloads to XP or Vista clients take consistent amounts of time 7 and use the same bandwidth for each client transfer, and that Windows 7 with BranchCache greatly accelerates the download. The different test conditions network speed and latency have a definite effect on the speed of all the transfers: slower speeds require longer transfer times (Figure 13 - SMB Test Results: Transfer Time, Page 28). The test conditions have no effect on Windows 7 bandwidth utilization, as can be seen by the overlap for all Windows 7 results (Figure 14 - SMB Results: Utilization, Page 29). Also clearly seen is the BranchCache effect on speed and bandwidth, with markedly sharp falloffs in both metrics. The download time for Windows 7 Distributed Mode for the Symmetrical 5 Mbps WAN condition does not show as great a savings, as the faster network speed shortened the time required for the initial file download, while the shortest and most accelerated download time approached the limits of the available bandwidth for all three WAN conditions. 7 The slightly shorter time illustrated for the third client is an anomaly of chart preparation. For clarity purposes, only the first of two test runs for the first three clients was selected for the chart. For the SMB scenario, the performance of the third client was slightly faster than for the previous two clients. The fourth and fifth clients and second test run were more consistent than this particular download instance. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 27

Figure 13 - SMB Test Results: Transfer Time Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 28

Figure 14 - SMB Results: Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 29

Test Scenario 2 HTTP File Downloads The HTTP File Access Test consists of file transfers initiated from a page hosted on an HTTP or web server. Results The chart, Average (Figure 15, Page 30) illustrates the 63 percent time savings delivered by Windows 7 with BranchCache over the nearly identical download times (see appendices for details) required by Windows Vista and Windows XP. Figure 15 - Average Download HTTP Protocol (Smaller is Better) The bandwidth savings for Windows 7 with BranchCache enabled showed savings of 49 percent as compared to the bandwidth required by Windows Vista or Windows XP (Figure 16, Page 31). Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 30

Figure 16 - Average Used: HTTP Protocol (Smaller is better) The following two charts show the results of acceleration on HTTP file transfers (Figure 17 - HTTP Test Results: Transfer Time, Page 32 and Figure 18 - HTTP Test Results: Utilization, Page 33). The charts show that file downloads to Windows XP or Windows Vista clients take consistent amounts of time and use the same bandwidth for each client transfer, and that Windows 7 with BranchCache greatly accelerates the file download. The different test conditions network speed and latency have a definite effect on the speed of all the file downloads: slower speeds require longer transfer times. This is evident for the 5 Mbps downloads for Windows Vista where the download time is less than half for the slower networks. It also is apparent with the faster initial client performance for Window 7 with BranchCache enabled. The acceleration provided by BranchCache is not as profound over the faster network, at least for a file size that is small relative to the connection speed. The test conditions have no effect on BranchCache bandwidth utilization, as can be seen in the near total overlap of the BranchCache results. BranchCache is equally efficient across the full range of test conditions utilized in this study. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 31

Time in 140 HTTP Test Results Transfer Time 120 Asymmetrical 1.5Mbps/384Kbps Windows Vista 100 80 Symmetrical 1.5Mbps Windows Vista Symmetrical 5Mbps Windows Vista 60 40 20 Asymmetrical 1.5Mbps/384Kbps Windows 7 Distributed Cache Symmetrical 1.5Mbps Windows 7 Distributed Cache Symmetrical 5Mbps Windows 7 Distributed Cache 0 1 2 3 Clients Figure 17 - HTTP Test Results: Transfer Time Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 32

MB 0.025 HTTP Test Results Utilization 0.02 Asymmetrical 1.5Mbps/384Kbps Windows Vista 0.015 Symmetrical 1.5Mbps Windows Vista Symmetrical 5Mbps Windows Vista 0.01 0.005 Asymmetrical 1.5Mbps/384Kbps Windows 7 Distributed Cache Symmetrical 1.5Mbps Windows 7 Distributed Cache 0 Symmetrical 5Mbps Windows 7 Distributed Cache -0.005 Clients Figure 18 - HTTP Test Results: Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 33

Test Scenario 3 SCCM Application Package Download Microsoft System Center Configuration Manager (SCCM) enables the automated transfer of application installation and patch files to end-user computers. SCCM utilizes the BITS throttling mechanism to manage the transfers, while the files themselves are transferred using the SMB protocol. The BranchCache Acceleration Affect only operates on the actual SMB file transfer aspect of an SCCM transaction, so the results are not as marked as for the two previous (HTTP and MOSS) tests. At the time of testing, SCCM with BITS was not supported in Hosted Cache mode, so no testing was performed for this configuration. 8 The release version of BranchCache and an updated SCCM now support Hosted Cache mode. Edison expects that the performance gains experienced in our other tests will carry over to SCCM in Hosted Cache Mode. Results SCCM download times for Windows 7 with BranchCache enabled were 76 percent faster than for Windows XP and 79 percent faster than for Windows Vista, as can be seen in the chart (Figure 19 Average : SCCM, Page 34). Application and operating system installations and patching can be very disruptive of productivity. Savings of this order of magnitude can be a major productivity boost. Figure 19 - Average : SCCM 8 The inability to test SCCM in hosted mode is what drove the decision to show only Windows 7 with BranchCache enabled in distributed mode in these charts. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 34

utilization was also much lower with Windows 7 with BranchCache enabled than with the older operating systems, though perhaps not so spectacularly. (Figure 20 Average Used: SCCM, Page 35) Nevertheless, Windows 7 used 53 percent less bandwidth than Windows Vista and 58 percent less bandwidth than required by Windows XP. Figure 20- Average Used: SCCM Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 35

The following two charts show the results of acceleration on downloads of SCCM Application Packages (Figure 21 - SCCM Test Results: Transfer Time, Page 37 and Figure 22 - SCCM Test Results: Utilization, Page 38). As in the other scenarios, the charts show that transfers to XP or Vista clients take consistent amounts of time and use the same bandwidth for each client transfer, and that Windows 7 with BranchCache greatly accelerates the data transfer. The different test conditions network speed and latency have a definite effect on the speed of all the transfers: slower speeds require longer transfer times. The effect of the higher network speeds is less pronounced with SCCM. Edison attributes this difference to the differences in the BITS protocol as compared to the other protocols tested. The download for Windows Vista under Asymmetrical conditions, as would be expected, utilized more bandwidth than downloads for Windows Vista under the symmetrical conditions. This was due to the longer time required for the client to communicate back to the SCCM server under asymmetrical conditions, thus slowing the entire process. This example shows a clear advantage for Windows 7 clients using BranchCache for OS and application downloads or patching from an organization s SCCM servers when there is an asymmetric connection. The savings in bandwidth from over 30 MBs of data transferred to nearly zero data transferred can have a considerable positive effect on branch office WAN utilization. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 36

Time in 350 SCCM Test Results Transfer Time 300 Asymmetrical 1.5Mbps/384Kbps Windows Vista 250 Symmetrical 1.5Mbps Windows Vista 200 Symmetrical 5Mbps Windows Vista 150 100 50 Asymmetrical 1.5Mbps/384Kbps Windows 7 Distributed Cache Symmetrical 1.5Mbps Windows 7 Distributed Cache Symmetrical 5Mbps Windows 7 Distributed Cache 0 1 2 3 Clients Figure 21 - SCCM Test Results: Transfer Time Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 37

MB 45 SCCM Test Results Utiliztion 40 35 30 Asymmetrical 1.5Mbps/384Kbps Windows Vista Symmetrical 1.5Mbps Windows Vista 25 Symmetrical 5Mbps Windows Vista 20 15 10 Asymmetrical 1.5Mbps/384Kbps Windows 7 Distributed Cache Symmetrical 1.5Mbps Windows 7 Distributed Cache 5 Symmetrical 5Mbps Windows 7 Distributed Cache 0 1 2 3 Clients Figure 22 - SCCM Test Results: Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 38

Test Scenario 4 MOSS 2007 File Access Microsoft Office SharePoint Server 2007 enables users to access files from a databasesupported and application-driven portal. In this test scenario, files were downloaded using the same technique as was used for the HTTP tests in Scenario 2. The only differences were that MOSS access was over the secure HTTPS protocol, and the files themselves were stored in the MOSS database. Results The BranchCache savings in time and bandwidth were very symmetrical. As illustrated in the chart (Figure 23 Average Used: MOSS 2007) bandwidth savings were the same 66 per cent for Windows 7 as compared to Windows XP or Windows Vista. Time savings for Windows 7 with BranchCache enabled over Windows XP were 68 percent. The savings over Windows Vista were 65 percent (Figure 24 Average : MOSS 2007). Figure 24 - Average Used: MOSS 2007 (Smaller is better.) Figure 24 - Average : MOSS 2007 (Smaller is better.) Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 39

The chart (Figure 25 - MOSS 2007 Test Results: Transfer Time, Page 41) shows the results of acceleration on MOSS 2007 HTTPS file downloads. The chart shows that file downloads to Windows Vista clients take virtually identical times for the slower asymmetrical and symmetrical network conditions without noticeable variation during the tests. This showed that there was little to no communication to the MOSS server once the download commenced. The performance for Windows Vista at 5 Mbps shows some speed variation. As in a previous test, this variation was an anomaly of the chart-making procedure: the download to second client for the first test run was slightly slower than for the other clients in either test run. Since the chart only shows three runs, this difference is more obvious than it would be if all the test runs were shown. utilization for file downloads with MOSS 2007 (Figure 26 - MOSS 2007 Test Results: Utilization, Page 42) was very consistent for both operating systems illustrated. The chart line overlaps reveal that the two 1.5 Mbps downloads to Windows Vista utilized virtually identical bandwidth, while the 5 Mbps Windows Vista download utilized slightly less bandwidth, but the results under all three conditions were very similar in utilization. Once again, the chart line overlap shows that Windows 7 with BranchCache results were nearly identical for all three test conditions, quickly approaching zero WAN bandwidth utilization. Organizations with MOSS 2007 servers hosting remote offices connected over a range of network conditions will see a significant productivity boost due to faster file download speeds. costs and contention will also be positively affected by running Windows 7 clients with BranchCache enabled. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 40

Figure 25 - MOSS 2007 Test Results: Transfer Time Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 41

Figure 26 - MOSS 2007 Test Results: Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 42

Test Scenario 5 App-V Microsoft Application Virtualization enables organizations to simplify the management and deployment of applications to PCs and laptops. It does this by delivering only the code necessary to start the program when the user clicks the application shortcut. Additional code is downloaded as needed in the background as the program is used. In this scenario, Edison created a program package using Microsoft Office 2010 and, using the App-V deployment tools and Administrative tools, a shortcut to Office was delivered to a user on each PC for each operating system being tested. For the test, the user started the PowerPoint 2010 program, the duration from initial click to PowerPoint being ready to use was timed, and the bandwidth utilization was measured. Results The size of the virtualized application files being delivered was much greater than that for the file downloads performed in the other tests. Naturally, this resulted in much longer download times. The tests for Windows 7 with BranchCache in Distributed Cache mode showed little to no performance improvement while the tests for Windows 7 in Hosted Cache mode showed similar benefits to those achieved in the other download scenarios. Edison believes that in distributed cache mode, the PCs were unable to provide the performance required by the large files being transferred. It is possible that PCs with much higher performance characteristics would show greater performance gains in distributed mode. The BranchCache savings in bandwidth were very symmetrical. As illustrated in the chart (Figure 28, Page 44), bandwidth savings was 33 percent for Windows 7 as compared to Windows Vista and 37 percent as compared to Windows XP. Time savings for Windows 7 with BranchCache enabled over Windows XP was 24 percent. The savings over Windows Vista was 34 percent (Figure 27, Page 44). Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 43

Average MB Average to Open Application Average App-V 600.00 500.00 400.00 300.00 200.00 100.00 0.00 W7 w. BC Enabled Windows Vista Windows XP Figure 27: App-V Average Average Used App-V 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 W7 w. BC Hosted Cache Enabled Windows Vista Windows XP Figure 28: App-V Average Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 44

The two charts on the following pages show the results of acceleration by starting an application with App-V. The charts show that application startup on XP or Vista clients take consistent amounts of time and use the same bandwidth for each client transfer, and that Windows 7 with BranchCache greatly accelerates the download. The different test conditions network speed and latency have a definite effect on the speed of all the transfers: slower speeds require longer transfer times (Figure 29, Page 46). The test conditions have less effect on Windows 7 bandwidth utilization, as can be seen in Figure 30, Page 47). The download time for Windows 7 Distributed Mode for the Symmetrical 5 Mbps WAN condition does not show as great a savings, as the faster network speed shortened the time required for the initial file download, while the shortest and most accelerated download time approached the limits of the available bandwidth for all three WAN conditions. Edison believes this is due to performance constraints imposed by the client PCs as compared to the much higher performance server use for hosted mode. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 45

Figure 29 - App-V Transfer Times Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 46

MB App-V Test Results Utilization 80.00 70.00 60.00 Asymmetrical 1.5Mbps/384K bps Windows XP Symmetrical 1.5Mbps Windows Vista 50.00 Symmetrical 5Mbps Windows Vista 40.00 30.00 20.00 10.00 Asymmetrical 1.5Mbps/384K bps Windows 7 Hosted Cache Symmetrical 1.5Mbps Windows 7 Hosted Cache Symmetrical 5Mbps Windows 7 Hosted Cache 0.00 1 2 3 4 5 Clients Figure 30 - App-V Utilization Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 47

Conclusions and Recommendations Edison analysts created and ran a series of tests designed to provide quantified data that would illustrate the effects of the file transfer acceleration provided by using Windows 7 and Windows Server 2008 R2 with BranchCache enabled. The result of Edison s testing shows that BranchCache delivers on its promise. File downloads were, on average, 69 percent faster with Windows 7 and BranchCache than for Windows XP and 66 percent faster than for Windows Vista. utilization averaged 58 percent less for Windows 7 versus Windows XP and 53 percent less than Windows Vista. Starting Microsoft Office 2010 programs such as PowerPoint was 24 percent faster with Windows 7 and BranchCache in Hosted Cache mode than for Windows XP and 34 percent faster than for Windows Vista. utilization averaged 37 percent less for Windows 7 versus Windows XP and for 33 percent less for Windows Vista. With the vast range of possible configurations and tariffs, Edison has made no attempt to calculate the potential financial savings attributable to lower bandwidth utilization, but it should be obvious that the significant bandwidth savings possible with BranchCache could have an ameliorating effect on operating system upgrade costs, possibly sufficient to justify branch office upgrades. Edison believes that the results support several recommendations for organizations contemplating upgrading their end-user operating systems to Windows 7. The first of these is to stage upgrades to central servers and branch offices. Upgrade remotely accessible servers to Windows Server 2008 R2 and remote branch computers to use Windows 7, adding branch servers using Windows Server 2008 R2 where necessary. Distributed Cache mode allows IT professionals to take advantage of BranchCache with minimal hardware deployments in the branch office. However, if the branch has deployed other infrastructure (for example, servers running other workloads) using Hosted Cache mode may be beneficial for increased cache availability and caching for the entire branch office. (Microsoft suggests that Distributed Cache mode can be adequate for offices of fewer than 50 users on a subnet). The second recommendation is to consider the replacement of shared folder network designs with SharePoint. Whether an organization utilizes Windows SharePoint Services (WSS, available at no charge) or the more sophisticated and centrally manageable Microsoft Office SharePoint Server (MOSS), the productivity benefits of higher transfer speeds and lower bandwidth costs can offset many SharePoint adoption costs while providing the recognized business value of the SharePoint portal paradigm. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 48

A third recommendation is to include Microsoft Application Virtualization as part of any plans for upgrading to Microsoft Office 2010. For many organizations, the extra infrastructure and effort in configuration of the App-V will pay off very quickly due to lower administrative and Help desk costs, easier management of application licenses, and the other benefits offered by App-V. These savings are compounded by bandwidth and other savings delivered by the combination of Windows 7 and Windows Server 2008 R2 with BranchCache. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 49

Appendices Test Environment This section consists of a detailed listing of the equipment and software utilized in testing, including applicable configuration settings details. Remote Office s (5) Model CPU Memory Operating Systems Hard Drive Acer Veriton 460 G Intel Core 2 Duo E7500 (2.93 MHz) 4 GB Windows XP Professional Windows Vista Business Windows 7 Enterprise 160 GB Western Digital Caviar Blue SATA II Remote Office Switch Dell PowerConnect 2216 unmanaged 10/100 16 ports Remote Office Server App-V Model CPU Memory Operating Systems Hard Drive Roles and Features HP Proliant DL360 G6 Dual Intel Xeon E5540 quad core (2.53 GHz) 16 GB Windows Server 2008 R2 Enterprise 250 GB HD BranchCache Hosted Cache server File Server Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 50

Remote Office Server Model CPU Memory Operating Systems Hard Drive Roles and Features Acer Veriton 460 G Intel Core 2 Duo E7500 (2.93 MHz) 4 GB Windows Server 2008 R2 Enterprise 160GB Western Digital Caviar Blue SATA II Active Directory Domain Controller IIS web server BranchCache Hosted Cache server File Server WAN Emulator Apposite Linktropy 4500 WAN Emulator configured as router Virtual Server Host Model Dell PowerEdge 2950 CPU Memory Operating Systems Hard Drive Virtual Machines Intel Xeon E5320 (Quad core 1.83 GHz) 16 GB Windows Server 2008 Datacenter with Hyper-V 4x73 GB SAS on PERC 5i RAID controller Active Directory Domain Controller HQ2008R2 A File and Web server used as the data source for SMB and HTTP testing SQL08A A Windows Server 2003 R2 server running SQL Server 2008 hosting the SCCM and SharePoint databases Virtual Server Host App-V Model CPU Memory Operating Systems HP Proliant DL360 G6 Intel Xeon E5540 (Quad core 2.53 GHz) 8 GB Windows Server 2008 Datacenter with Hyper-V Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 51

Hard Drive Virtual Machines 1x250 GB SAS Active Directory Domain Controller DNS, WINS, IIS8, Certificate Authority Server and APP-V 4.6 w/ MS office 2010 APP-V published virtual Application SCCM and MOSS hosts Model CPU Memory Operating Systems Hard Drive Virtual Machines Gateway DX4200-09 AMD Phenom X4 9100e (1.80 GHz, quad core) 4 GB Windows Server 2008 R2 Enterprise 160 GB Western Digital Caviar Blue Active Directory Domain Controller HQ2008R2 A Windows Server 2008 R2 Enterprise system providing file and web services used as the data source for SMB and HTTP testing SQL08A A Windows Server 2003 R2 server running SQL Server 2008 hosting the SCCM and SharePoint databases. Test Results The following pages present the results of Edison s testing. The results are presented for each test scenario in the form of a summary table that lists each test condition and operating system, and in detail tables showing the results of each test run. In the summary tables, the results for each platform, for each WAN condition are shown in one table. A second table shows the percent advantage of Windows 7 with BranchCache enabled versus the legacy operating systems Windows Vista and Windows XP. In the details tables, file transfer duration is presented in minutes and seconds (MM:SS). Data transferred is presented in MB or KB as measured during transfer through the WAN emulator. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 52

CIFS/SMB Test Results Results Summary The test results show that Windows 7 with BranchCache enabled is 58 percent faster and requires 45 percent less bandwidth than Windows Vista. The results also show that Windows 7 with BranchCache enabled is 69 percent faster while requiring 59 percent less bandwidth than Windows XP. The performance advantages are not as great when compared to the results from some other scenarios. Edison believes the performance difference is due to the way the application (PowerPoint 2007) interacts with the network while retrieving the file. While the files were being transferred, it appeared that the first data blocks were being sent from the remote server while BranchCache was checking whether the file existed in a local cache. When the cached file was identified, network transfers stopped and the remainder of the file was transferred from the branch cache. Presuming our observation matches BranchCache design, it is probable that transferring larger files would demonstrate a greater difference in speed and bandwidth utilization. CIFS/SMB Scenario Test Results WAN Condition/OS Windows 7 File Download Time in Utilization MB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache 56.75 9.56 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache 54.13 9.09 Symmetrical 1.5 Mbps Windows 7 Distributed Cache 58.63 9.21 Symmetrical 1.5 Mbps Windows 7 Hosted Cache 52.13 9.11 Symmetrical 5 Mbps Windows 7 Distributed Cache 35.88 9.63 Symmetrical 5 Mbps Windows 7 Hosted Cache 33.63 10.14 Windows XP Asymmetrical 1.5 Mbps/384 Kbps Windows XP 154.00 23.05 Symmetrical 1.5 Mbps Windows XP 160.67 22.93 Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 53

CIFS/SMB Scenario Test Results WAN Condition/OS File Download Time in Utilization MB Symmetrical 5 Mbps Windows XP 160.67 22.93 Windows Vista Asymmetrical 1.5 Mbps/384Kbps Windows Vista 128.50 23.50 Symmetrical 1.5 Mbps Windows Vista 127.33 5.06 Symmetrical 5 Mbps Windows Vista 69.50 22.87 Average bandwidth and download times by platform Platform Average Used in MB Average in W7 w. BC Enabled 9.46 48.52 Windows Vista 17.14 114.51 Windows XP 22.97 158.44 Comparison of Windows 7 with Windows Vista and Windows XP Windows 7 Advantage Average Used Average Versus Vista 45% 58% Versus XP 59% 69% Details The following tables show the results for all the test runs for each WAN bandwidth condition. The files on the remote server were pre-cached, so only the first Windows 7 workstation to download the file utilized WAN bandwidth. The other Windows 7 workstations downloaded the file from the branch workstation s cache. Test runs ceased after three successful transfers occurred without significant deviation in performance (indicated as NTR in the table). Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 54

Asymmetrical 1.5 Mbps/384 Kbps Windows XP File 1 2:35 22.6 MB 2:33 23.5 MB 2 2:34 22.7 MB 2:34 23.4 MB 3 2:35 22.6 MB 2:34 23.5 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Asymmetrical 1.5 Mbps/384 Kbps Windows Vista File 1 2:09 23.6 MB 2:08 23.4 MB 2 2:09 23.6 MB 2:08 23.4 MB 3 2:08 23.6 MB 2:09 23.4 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache File 1 2:11 22.6 MB 2:14 23.4 MB 2 0:18 3 MB 0:29 4.5 MB 3 0:32 5.7 MB 0:41 6 MB 4 0:30 4.5 MB 0:39 6.8 MB 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 55

Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache File 1 2:14 23.9 MB 2:07 22.0 MB 2 0:24 3.4 MB 0:29 4.5 MB 3 0:25 3.4 MB 0:35 5.6 MB 4 0:24 3.4 MB 0:35 5.6 MB 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows XP File 1 3:01 23.0 MB 3:06 23.6 MB 2 3:00 23.2 MB 3:06 23.6 MB 3 3:01 23.1 MB 3:06 23.6 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows Vista File 1 2:08 23 MB 2:10 23.6 MB 2 2:07 23.1 MB 2:10 23.6 MB 3 2:07 23.1 MB 2:11 23.6 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 56

Symmetrical 1.5 Mbps Windows 7 Distributed Cache File 1 2:12 23.1MB 2:14 22.7 MB 2 0:25 3.4 MB 0:25 3.4 MB 3 0:38 5.6 MB 0:49 7.2 MB 4 0:25 3.4 MB 0:31 4.2 MB 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows 7 Hosted Cache File 1 1:05 23.2 MB 1:11 22.5 MB 2 0:27 4.5 MB 0:24 5.6 MB 3 0:29 5.6 MB 0:30 8.9 MB 4 0:35 6.7 MB 0:06 35 KB 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows XP File 1 2:44 22.9 MB 2:33 23.0 MB 2 2:43 22.9 MB 2:39 23.1 MB 3 2:42 22.8 MB 2:43 23.0 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 57

Symmetrical 5 Mbps Windows Vista File 1 1:33 22.9 MB 1:26 22.9 MB 2 1:34 22.8 MB 1:00 22.9 MB 3 1:07 22.8 MB 0:49 22.9 MB 4 1:04 22.8 MB 0:56 23 MB 5 1:06 22.8 MB 1:00 22.9 MB Symmetrical 5 Mbps Windows 7 Distributed Cache File 1 1:05 23.2 MB 1:11 24.3 MB 2 0:27 4.5 MB 0:24 4.0 MB 3 0:29 5.6 MB 0:30 5.8 MB 4 0:35 6.7 MB 0:30 5.7 MB 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows 7 Hosted Cache File 1 1:07 23 MB 0:57 23.6 MB 2 0:20 5.6 MB 0:28 7.8 MB 3 0:24 5.6 MB 0:16 3.4 MB 4 0:23 6.6 MB 0:34 5.5 MB 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 58

HTTP Test Results Results Summary The test results show that Windows 7 with BranchCache enabled is 63 percent faster than either Windows Vista or XP. savings for Windows 7 versus Windows Vista or Windows XP was 49 percent. HTTP Scenario Test Results WAN Condition/OS Windows 7 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache Symmetrical 1.5 Mbps Windows 7 Distributed Cache Symmetrical 1.5 Mbps Windows 7 Hosted Cache Symmetrical 5 Mbps Windows 7 Distributed Cache File Download Time in 51.40 9.00 53.80 9.13 50.60 8.99 53.80 9.13 18.50 9.14 Symmetrical 5 Mbps Windows 7 Hosted Cache 11.50 23.63 Utilization MB HTTP Scenario Test Results WAN Condition/OS Windows Vista File Download Time in Asymmetrical 1.5 Mbps/384 Kbps Windows XP 123.70 22.58 Symmetrical 1.5 Mbps Windows XP 120.50 22.30 Symmetrical 5 Mbps Windows XP 78.33 22.70 Windows XP Asymmetrical 1.5 Mbps/384 Kbps Windows 121.50 22.57 Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 59

HTTP Scenario Test Results WAN Condition/OS Vista File Download Time in Symmetrical 1.5 Mbps Windows Vista 125.00 22.00 Symmetrical 5 Mbps Windows Vista 77.67 22.77 Utilization MB Average bandwidth and download times by platform Platform Average Used in MB W7 w. BC Enabled 11.50 39.93 Windows Vista 22.45 108.06 Windows XP 22.53 107.51 Average in Comparison of Windows 7 with Windows Vista and Windows XP Windows 7 Advantage Average Used Average Versus Vista 49% 63% Versus XP 49% 63% Details Asymmetrical 1.5 Mbps/384 Kbps Windows XP File 1 2:07 22.6 MB 2:00 22.5 MB 2 2:06 22.8 MB 2:01 22.5 MB 3 2:07 22.6 MB 2:01 22.4 MB 4 2:08 22.7 MB 2:00 22.6 MB 5 2:06 22.6 MB 2:01 22.5 MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 60

Asymmetrical 1.5 Mbps/384Kbps Windows Vista File 1 1:59 22.3 MB 2:04 22.9 MB 2 2:00 22.3 MB 2:02 22.8 MB 3 2:00 22.4 MB 2:03 22.8 MB 4 2:01 22.3 MB 2:02 22.8 MB 5 2:00 22.3 MB 2:04 22.8 MB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache File 1 2:06 22.4 MB 2:02 22.5 MB 2 2:04 22.4 MB 2:01 22.5 MB 3 0:04 15 KB 0:03 18 KB 4 0:04 22 KB 0:03 27 KB 5 0:04 67 KB 0:03 21 KB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache File 1 2:05 23.0 MB 2:11 22.6 MB 2 2:03 22.9 MB 2:08 22.7 MB 3 0:06 9 KB 0:05 14 KB 4 0:05 11 KB 0:05 33 KB 5 0:05 5 KB 0:05 41 KB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 61

Symmetrical 1.5 Mbps Windows XP File 1 1:52 22 MB 2:01 23 MB 2 2:02 22 MB 2:02 22 MB 3 2:01 23 MB 2:01 22. MB 4 2:01 22 MB 2:02 23 MB 5 2:02 22 MB 2:01 22 MB Symmetrical 1.5 Mbps Windows Vista File 1 2:07 22 MB 2:02 22. MB 2 2:07 22 MB 2:03 22 MB 3 2:08 22 MB 2:03 22 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows 7 Distributed Cache File 1 2:03 22 MB 2:02 22.9 MB 2 2:02 22 MB 2:02 22.8 MB 3 0:02 7 KB 0:03 12 KB 4 0:03 41 KB 0:03 54 KB 5 0:03 19 KB 0:03 34 KB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 62

Symmetrical 1.5 Mbps Windows 7 Hosted Cache File 1 2:05 23.0 MB 2:11 22.6 MB 2 2:03 22.9 MB 2:08 22.7 MB 3 0:06 9 KB 0:05 14 KB 4 0:05 11 KB 0:05 33 KB 5 0:05 5 KB 0:05 41 KB Symmetrical 5 Mbps Windows XP File 1 1:26 22.8 1:21 22.6 2 1:16 22.8 1:19 22.7 3 1:11 22.7 1:17 22.6 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows Vista File 1 2:07 22 MB 2:02 22 MB 2 2:07 22 MB 2:03 22 MB 3 2:08 22 MB 2:03 22 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 63

Symmetrical 5 Mbps Windows 7 Distributed Cache File 1 0:38 23.15 0:47 22.4 2 0:41 23.7 0:41 22.5 3 0:03 21 K 0:03 34 K 4 0:03 47 K 0:03 43 K 5 0:03 23 K 0:03 48 K Symmetrical 5 Mbps Windows 7 Hosted Cache File 1 0:41 23.1 MB 0:42 22.8 MB 2 0:48 23.2 MB 0:46 22.9 MB 3 0:03.012 KB 0:03 0 4 0:03 8 KB 0:03 12 KB 5 NTR NTR NTR NTR The larger variations in transfer times on this test are caused by the higher packet loss rate. Since TCP/IP drops its net utilization when a packet is lost, packets lost close together or at the end of a file transfer have smaller effects than those spread out or at the end of the file transfer. Vista and Windows 7 improved TCP/IP stacks recover faster and handle latency better on long fat pipes. MOSS2007 Test Results Results Summary The test results show that Windows 7 with BranchCache enabled is 65 percent faster than Windows Vista, and 68 percent faster than Windows XP. savings for Windows 7 versus Windows Vista or Windows XP was 66 percent. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 64

MOSS 2007 Test Results WAN Condition/OS File Download Time in Windows 7 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache 51.20 9.23 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache 32.75 5.71 Symmetrical 1.5 Mbps Windows 7 Distributed Cache 50.30 9.10 Symmetrical 1.5 Mbps Windows 7 Hosted Cache 32.75 5.72 Symmetrical 5 Mbps Windows 7 Distributed Cache 22.00 9.01 Symmetrical 5 Mbps Windows 7 Hosted Cache 16.22 7.53 Windows XP Asymmetrical 1.5 Mbps/384 Kbps Windows XP 124.00 23.10 Symmetrical 1.5 Mbps Windows XP 123.50 22.77 Symmetrical 5 Mbps Windows XP 76.67 22.53 Windows Vista Asymmetrical 1.5 Mbps/384 Kbps Windows Vista 124.00 23.12 Symmetrical 1.5 Mbps Windows Vista 124.17 23.12 Symmetrical 5 Mbps Windows Vista 47.33 22.48 Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 65

Average bandwidth and download times by platform Platform Average Used in MB W7 w. BC Enabled 7.72 34.20 Windows Vista 22.91 98.50 Windows XP 22.80 108.06 Average in Comparison of Windows 7 with Windows Vista and Windows XP Windows 7 Advantage Average Used Average Versus Vista 66% 65% Versus XP 66% 68% Details Asymmetrical 1.5 Mbps/384 Kbps Windows XP File 1 2:07 23.7 MB 2:01 22.5 MB 2 2:07 23.7 MB 2:01 22.5 MB 3 2:07 23.7 MB 2:01 22.5 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Asymmetrical 1.5 Mbps/384 Kbps Windows Vista File 1 2:07 23.6 MB 2:01 22.6 MB 2 2:07 23.7 MB 2:01 22.6 MB 3 2:07 23.6 MB 2:01 22.6 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 66

Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache File 1 2:07 23.6 MB 2:01 22.7 MB 2 2:06 23.5 MB 2:00 22.4 MB 3 0:04 6 kb 0:03 4 KB 4 0:03 12 kb 0:03 22 KB 5 0:03 27 kb 0:03 19 KB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache File 1 2:02 23 MB 2:02 22.6 MB 2 0:03 22 KB 0:03 11 KB 3 0:03 4 KB 0:03 5 KB 4 0:03 13 KB 0:03 16 KB 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows XP File 1 2:03 22.7 MB 2:04 22.8 MB 2 2:03 22.7 MB 2:04 22.8 MB 3 2:04 22.8 MB 2:03 22.8 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 67

Symmetrical 1.5 Mbps Windows Vista File 1 2:07 23.6 MB 2:01 22.6 MB 2 2:07 23.6 MB 2:01 22.6 MB 3 2:07 23.7 MB 2:02 22.6 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows 7 Distributed Cache File 1 2:01 22.8 MB 2:02 22.8 MB 2 2:01 22.6 MB 2:01 22.6 MB 3 0:03 2.4 KB 0:03 6 KB 4 0:03 11 KB 0:03 8 KB 5 0:03 108 KB 0:03 16 KB Symmetrical 1.5 Mbps Windows 7 Hosted Cache File 1 2:03 22.9 MB 2:01 22.6 MB 2 0:03 226 KB 0:03 0 3 0:03 0.59 KB 0:03 22 KB 4 0:03 25 KB 0:03 14 KB 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 68

Symmetrical 5 Mbps Windows XP File 1 1:17 22.8 MB 1:20 22.2 MB 2 1:16 22.8 MB 1:16 22.3 MB 3 1:17 22.8 MB 1:23 22.3 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows Vista File 1 0:42 22.8 MB 0:46 22.1 MB 2 0:53 22.9 MB 0:48 22.3 MB 3 0:46 22.8 MB 0:49 22 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR SCCM Test Results Results Summary The test results show that Windows 7 with BranchCache enabled is 76 percent faster than Windows Vista and 79 percent faster than Windows XP. savings for Windows 7 versus Windows Vista was 58 percent. Windows 7 required 53 percent less bandwidth than Windows XP. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 69

SCCM Test Results WAN Condition/OS File Download Time in Windows 7 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache 45.64 7.26 Symmetrical 1.5 Mbps Windows 7 Distributed Cache 58.62 8.40 Symmetrical 5 Mbps Windows 7 Distributed Cache 33.31 24.20 Windows XP Asymmetrical 1.5 Mbps/384 Kbps Windows XP 190.67 29.28 Symmetrical 1.5 Mbps Windows XP 221.83 33.15 Symmetrical 5 Mbps Windows XP 155.50 32.70 Windows Vista Asymmetrical 1.5 Mbps/384Kbps Windows Vista 209.83 28.25 Symmetrical 1.5 Mbps Windows Vista 219.33 33.05 Symmetrical 5 Mbps Windows Vista 213.33 24.20 Utilization MB Average bandwidth and download times by platform Platform Average Used in MB Average, in seconds W7- w. BC-Enabled 13.29 45.86 Windows Vista 31.71 189.33 Windows XP 28.50 214.17 Comparison of Windows 7 with Windows Vista and Windows XP Windows 7 Advantage Average Used Average Versus Vista 58% 76% Versus XP 53% 79% Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 70

Details The following tables show the results for all the test runs for each WAN bandwidth condition. The files on the remote server were pre-cached, so only the first Windows 7 workstation to download the file utilized WAN bandwidth. The other Windows 7 workstations downloaded the file from the branch workstation s cache. Test runs ceased after three successful transfers occurred without significant deviation in performance (indicated as NTR in the table). At the time of testing SCCM was not supported in Hosted mode. These results are shown as N/A. Asymmetrical 1.5 Mbps/384Kbps Windows XP File 1 2:39 24.9 MB 3:31 32.6 2 2:47 25.1 MB 3:31 32.6 3 3:05 27.9 MB 3:31 32.6 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Asymmetrical 1.5 Mbps/384 Kbps Windows Vista File 1 3:27 32.6 MB 2:33 23.9 MB 2 3:26 32.6 MB 2:34 23.9 MB 3 3:27 32.6 MB 2:32 23.9 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 71

Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache File 1 4:01 32.2 MB 3:31 32.6 2 0:11 166 KB 0:28 0.041 3 0:37 39 KB 0:21 0.085 4 0:28 12 KB 0:46 0.009 5 0:26 153 KB NTR NTR Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache File 1 N/A N/A N/A N/A 2 N/A N/A N/A N/A 3 N/A N/A N/A N/A 4 N/A N/A N/A N/A 5 N/A N/A N/A N/A Symmetrical 1.5 Mbps Windows XP File 1 4:25 39.8 MB 2:59 26.6 MB 2 4:22 39.7 MB 3:00 26.5 MB 3 4:25 39.7 MB 3:00 26.6 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 72

Symmetrical 1.5 Mbps Windows Vista File 1 4:22 31.8 MB 2:42 16.6 MB 2 4:22 31.9MB 2:40 16.5MB 3 4:25 31.9 MB 2:37 16.5 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows 7 Distributed Cache File 1 5:03 39.6 MB 4:50 25.6 MB 2 0:21 1.7 MB 0:22 42 KB 3 0:56 65 KB 0:34 49 KB 4 0:27 114 KB 0:27 36 KB 5 NTR NTR NTR NTR Symmetrical 1.5 Mbps Windows 7 Hosted Cache File 1 N/A N/A N/A N/A 2 N/A N/A N/A N/A 3 N/A N/A N/A N/A 4 N/A N/A N/A N/A 5 N/A N/A N/A N/A Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 73

Symmetrical 5 Mbps Windows XP File 1 2:38 33.5 MB 2:26 31.9 MB 2 2:42 33.5 MB 2:34 31.9 MB 3 2:45 35.0 MB 2:28 31.8 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows Vista File 1 4:30 31.8 MB 2:42 16.6 MB 2 4:21 31.9 MB 2:40 16.5 MB 3 4:30 31.9 MB 2:37 16.5 MB 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Symmetrical 5 Mbps Windows 7 Distributed Cache File 1 1:37 16.4 MB 1:41 16.7 MB 2 0:21 1.1 MB 0:23 1.2 MB 3 0:22 42 KB 0:22 42 KB 4 0:14 32 KB 0:15 34 KB 5 NTR NTR NTR NTR Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 74

Symmetrical 5 Mbps Windows 7 Hosted Cache File 1 N/A N/A N/A N/A 2 N/A N/A N/A N/A 3 N/A N/A N/A N/A 4 N/A N/A N/A N/A 5 N/A N/A N/A N/A App-V results Results Summary The test results show that overall, Windows 7 with BranchCache enabled is 34 percent faster than Windows Vista and 24 percent faster than Windows XP. savings for Windows 7 versus Windows Vista was 33 percent. Windows 7 required 37 percent less bandwidth than Windows XP. App-V Test Results WAN Condition/OS Windows 7 File Download Time in Utilization MB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache 327.30 35.69 Symmetrical 1.5 Mbps Windows 7 Hosted Cache 546.80 46.99 Symmetrical 5 Mbps Windows 7 Hosted Cache 110.90 34.15 Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache 446.70 42.00 Symmetrical 1.5 Mbps Windows 7 Distributed Cache 582.55 52.52 Symmetrical 5 Mbps Windows 7 Distributed Cache 131.10 41.86 Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 75

App-V Test Results WAN Condition/OS Windows XP File Download Time in Utilization MB Asymmetrical 1.5 Mbps/384 Kbps Windows XP 585.50 66.14 Symmetrical 1.5 Mbps Windows XP 807.50 66.14 Symmetrical 5 Mbps Windows XP 230.00 67.16 Windows Vista Asymmetrical 1.5 Mbps/384Kbps Windows Vista 745.67 64.94 Symmetrical 1.5 Mbps Windows Vista 505.50 63.45 Symmetrical 5 Mbps Windows Vista 167.00 58.54 Average bandwidth and download times by platform Platform File in W7- w. BC-Enabled 357.56 42.00 Windows Vista 472.72 62.31 Windows XP 541.00 66.48 Utilization MB Comparison of Windows 7 with Windows Vista and Windows XP Windows 7 Advantage Average Used Average Versus Vista -33% -34% Versus XP -37% -24% Details The following tables show the results for all the test runs for each WAN bandwidth condition. For Hosted Mode, the files on the remote server were pre-cached, so only the first Windows 7 workstation to download the file, fully utilized WAN bandwidth. The second download used WAN bandwidth at the start of the download, switching to cached data during the download process. The other Windows 7 workstations Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 76

downloaded the file from the branch workstation s cache. 9 For Windows XP and Vista, test runs ceased after three successful transfers occurred without significant deviation in performance (indicated as NTR in the table). Asymmetrical 1.5 Mbps/384 Kbps Windows XP Utilization MB 1 9:48 66.14 9:47 66.14 2 9:44 66.14 9:47 66.14 3 9:45 66.14 9:44 66.14 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB Asymmetrical 1.5 Mbps/384 Kbps Windows Vista Utilization MB 1 12:45 65.58 12:45 65.59 2 12:10 64.37 12:20 64.88 3 12:24 64.88 12:10 64.37 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB 9 On certain occasions, one or more PCs would either consume a greater amount of WAN bandwidth. Edison could not determine the cause of this behavior using the tools at its disposal. Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 77

Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Distributed Cache Utilization MB 1 12:59 71.49 12:55 71.73 2 5:51` 31.46 6:08 34.14 3 6:05 33.03 6:09 34.29 4 5:59 32.18 6:16 34.81 5 5:56 31.73 6:09 33.76 Utilization MB Asymmetrical 1.5 Mbps/384 Kbps Windows 7 Hosted Cache Utilization MB 1 9:29 71.58 9:25 72.87 2 4:17 25.51 4:28 27.01 3 4:29 27.11 4:29 27.13 4 4:25 26.41 4:34 27.54 5 4:28 26.04 4:29 26.71 Utilization MB Symmetrical 1.5 Mbps Windows XP Download Time in Minutes: Utilization MB Download Time in Minutes: 1 14:45 66.7 14:45 66.7 2 12:01 60.36 13:09 64.7 3 13:11 64.68 12:54 64.4 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 78

Symmetrical 1.5 Mbps Windows Vista Utilization MB 1 8:36 64.0 8:36 64.0 2 8:18 63.2 8:24 63.2 3 8:21 63.2 8:18 63.2 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB Symmetrical 1.5 Mbps Windows 7 Distributed Cache Utilization MB 1 12:46 64.10 12:35 63.14 2 11:32 63.79 11:42 61.88 3 7:50 45.29 8:11 45.17 4 8:09 46.19 8:16 45.62 5 8:04 45.27 8:01 44.25 Utilization MB Symmetrical 1.5 Mbps Windows 7 Hosted Cache Utilization MB 1 13:05 72.21 11:51 73.22 2 11:43 58.69 5:59 62.75 3 7:20 26.79 6:40 30.80 4 6:21 26.79 10:00 63.19 5 5:57 25.30 6:12 30.15 Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 79

Symmetrical 5 Mbps Windows XP Download Time in Minutes: Utilization MB Download Time in Minutes: 1 3:55 68.0 3:58 68.0 2 3:45 66.8 3:47 66.8 3 3:47 66.8 3:48 66.8 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB Symmetrical 5 Mbps Windows Vista Download Time in Minutes: Utilization MB Download Time in Minutes: 1 3:06 60.5 3:06 60.5 2 2:56 58.9 3:01 59.8 3 2:15 55.3 2:18 56.3 4 NTR NTR NTR NTR 5 NTR NTR NTR NTR Utilization MB Symmetrical 5 Mbps Windows 7 Distributed Cache Utilization MB 1 3:12 61.34 3:14 61.35 2 2:00 38.47 1:58 38.04 3 1:56 37.32 2:01 38.42 4 1:55 36.57 1:53 36.50 5 1:50 34.87 1:52 35.77 Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 80

Symmetrical 5 Mbps Windows 7 Hosted Cache Utilization MB 1 2:58 59.85 2:01 61.12 2 1:51 37.54 1:33 25.69 3 1:48 30.57 1:38 30.25 4 1:22 23.24 1:26 21.63 5 1:18 22.16 1:34 29.42 Utilization MB Enhanced Branch Office Productivity and WAN Savings with Microsoft BranchCache Page 81