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Leading-edge performance for Wide-area Data Services

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1 Leading-edge performance for Wide-area Data Services
Riverbed Leading-edge performance for Wide-area Data Services

2 An overview of Riverbed
The market leader in WAFS/Wide-area Data Services and application acceleration1 Products tested, proven, and deployed by the Fortune 500 and Global 1000 Delivers the speed, simplicity, and scale that corporations need Results to date: More than 750 enterprise customers deployed Thousands of Steelhead appliances installed worldwide 170+ channel partners Offices throughout U.S., Europe and Asia 250 employees Fully funded by Goldman Sachs, Accel, Lightspeed, & UV Partners 1 The InfoPro, Wave 7 Storage Survey, March Riverbed was cited as the market leader in WAFS/WDS among Fortune 1000 IT buyers. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

3 The business environment is changing
Increasing dependence on business applications Increasing consolidation of IT Lower costs & easier to manage Guaranteed data protection Increasing distribution of organizations 67% of employees work in a location other than the headquarters Globalization – global clients, global projects, global offices There is a tug-of-war going on between employees across the organization who need dependable application performance and IT consolidation. The war is made even worse by the increasing dependence on business applications. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

4 Distributed offices present new IT challenges
Lost Profit Users can’t get the job done Applications are just too slow Small tasks become big ones IT is focused on fire-fighting User frustration & mutiny Seconds of “wait time” becomes minutes… hours…days. Users create work- arounds to avoid corporate applications Costly infrastructure upgrades Servers Bandwidth Storage Implementation © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

5 Steelhead™ appliances solve these problems
“Makes 5000 Kilometers feel like next door” BRANCH OFFICE WAN DATA CENTER BRANCH OFFICE So, what is it? An IT Appliance Deployed in Remote Site and Data Center Clients Feel Like Servers in Data Centers are Local Overcomes Constraints of the WAN Transparent to Clients and Servers Best-in-class Compression Replaces Need for Caching We build an appliance, though Riverbed is a software company (customers want appliances, for the most part) You need one appliance on either side of a WAN link They can be deployed in an N+1 (hub and spoke, 1 big one in the datacenter and many on the edge) or fully meshed The appliances vary by disk size, WAN bandwidth supported, and therefore no. of users Steelhead appliances can be clustered behind a L4 Switch for scale What does it do? It overcomes the issues of limited bandwidth and high latency that we just discussed so that Clients feel like their remote servers are on the LAN (“LAN-like”) It’s completely transparent to clients & servers It’s not compression and it’s not caching NOTE: You may get some resistance to this. Ways to handle it include: Please bear with me and by the end, I’ll ask you what you think our technology is (If the customer is insistent that we are caching or compression, then give in on this point) Why we replace caching: Like a cache, we store data locally, which improves the performance for data sent across the WAN Unlike a cache, we handle all TCP traffic, not just one type (like files, web or mail for example) Unlike a cache, which is a proxy server, Steelhead appliances are not proxy servers We send every client request to the origin server in real time We never “serve” anything from the edge; our box just decodes requests and reassembles requests that were served by the origin server BEST IN CLASS DATA REDUCTION Steelhead appliances far outperform (by a factor of 5-10x) the next best compression appliances on the market. While other WAN compression appliances offer up to 10:1 compression (Peribit claims up to 7.2x compression in their latest white paper (see ). Riverbed can achieve compression ratios as high as 400:1 in single transactions. Our technology is sometimes described as being more like data “reduction” rather than “compression” Our objective is to never send data across the WAN that has ever been across before We don’t compress existing TCP payloads; rather, we examine payloads and determine whether we even have to send data at all We address the impact of application level protocol latency (compression appliances do not) Even new disk-based products announced by some customers do not have application-level protocol optimizations (which we refer to as “Application Streamlining”), so they will have little to no impact on Windows or Exchange performance over the WAN Adding a disk to a compression appliance does not solve all the problems. There are two dimensions to consider How far back in time can you look for repeated patterns (how much data do you store) When repeated data is found, how much of it can be represented by a “code” (or a “reference” in our case) We believe that our algorithms outperform our compression competitors on pure WAN optimization. They can introduce a product with an equivalent amount of disk, but that alone will not deliver the performance. Increases user and IT productivity Accelerates applications Saves bandwidth Eliminates the need for remote infrastructure The easiest product on the market to deploy No changes to client/servers No changes to IP addresses or QoS markings © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

6 One product, many solutions
Riverbed SteelheadTM Appliances Application Acceleration Site Consolidation Bandwidth Optimization Backup Replication Windows File Sharing NFS FTP Web ERP/CRM Lotus Notes Custom apps File servers servers Filers Remote storage Tape backup equip. Off-site media mgmt. On-line backup Outsourced services Expand narrow links Fill up LFNs Avoid WAN upgrades Reduce WAN bandwidth You should customize this slide to include Names/Brands of applications that your customer is using. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

7 Riverbed has customers in all industries
A/E/C Professional Services Manufacturing Media/Communications Finance Energy Healthcare/Bio/Pharma Telecom Government Retail/Consumer Tech/Software © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

8 Maximizing remote application performance

9 Distributed computing problems are converging
Networking problems Need “more bandwidth” Latency is a secret throughput killer Storage Tape Backup Tape Backup Filers WAN BRANCH OFFICE DATA CENTER File Servers Mail Servers Filers Mail Servers File Servers Web Servers Most companies use bandwidth as the scapegoat for all of the problems that remote offices have with application performance over the WAN. Poor performance, however, is the result of three equally important problems. Solving just one of them will not truly solve the problem. Networking bandwidth AND latency slow data access Storage problems result in excess capacity utilization for backup, high management costs, and limited access to data in other offices Applications that are not optimized for use over the WAN operate slowly even in high capacity environments Storage problems Data sprawl Islands of storage Backup & replication Compliance worries Application problems Web, , FTP, Notes, ERP, database, etc… Slow response times Apps often not used…too slow © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

10 Wide-area data services (WDS) is an integrated approach
Our approach exceeds all three previous generation WAN optimization technologies, but in one device. Riverbed Steelhead appliances: Accomplish WAFS, and much more Accomplish network compression and TCP optimization, and more Accomplish application acceleration, and more! An additional technology, discussed later, enables Steelhead appliances to operate even with a WAN failure. Even with this functionality turned off, Riverbed accomplishes the goals of ALL THREE of these older types of technology. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

11 The Riverbed Optimization System (RiOS)

12 The three root causes of poor wide-area application performance
Not enough bandwidth Transport protocol chattiness Application protocol inefficiencies If you don’t solve all three, users won’t see performance benefits. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

13 RiOS is an integrated approach
The Riverbed Optimization System Data Streamlining Eliminate redundant bytes from transfers Transport Streamlining Eliminate transport protocol inefficiencies Application Streamlining Optimize application WAN performance Important notes: You will notice that we no longer talk about “Scalable Data Referencing,” “Transaction Prediction” and “Virtual Windows Expansion”. Management Streamlining Enable transparent deployment & central management © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

14 The RiOS underlying framework
Initiate new TCP sessions Maintain TCP sessions Maintain TCP sessions WAN DATA CENTER BRANCH OFFICE 1. Accelerate the applications that are most important to your business Works for all application that use TCP Orders of magnitude improvements Riverbed Steelhead appliances are designed to provide no disruption to your current network upon deployment. The appliances can be transparently deployed and will maintain the flow of all data on the network. 2. Make it simple to deploy and manage Transparent deployment Auto-discovery, auto-interception No changes to clients, servers, or applications Robust central management © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

15 Data streamlining overcomes bandwidth limitations
60-99% reduction in WAN utilization Data Reconstructed Files & Data Request Files & Data WAN DATA CENTER BRANCH OFFICE Data Streamlining uses a proprietary algorithm to break up the data into small referenceable data chunks and store them in the central steelhead. The first time a file is sent through the network, all the data and reference links to the data are sent to the remote steelhead. (A “cold send”) The cold send is still optimized with the TCP and application optimizations discussed on the next slide. Next time data is requested the central steelhead needs to simply send references to data on the remote steelhead. If parts of the data has changed, the steelhead simply sends the chunks of data that have changed, with new references. The file is then reconstructed using a combination of the changed and unchanged data. Requests go directly from the client to the server Steelhead auto-intercepts response, and segments data Only new bytes compressed & sent over the WAN 16-Byte references communicate megabytes of existing data Remote Steelhead reconstructs data and delivers it to the client © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

16 Transport streamlining overcomes TCP limitations
The net effect is a 60-98% reduction in round trips WAN DATA CENTER BRANCH OFFICE A basic challenge with TCP is that it can only send a small amount of information at a time. Transport Streamlining allows Riverbed Steelhead appliances to communicate over the WAN with optimal TCP settings, facilitating more efficient communications. Make TCP payload bigger 16KB to KB+ Repack payload with references From 100KB+ to Virtual 1MB+ References New data Data © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

17 Transport streamlining provides many more TCP optimizations
High-speed TCP “Fill the pipe” for OC3 and larger connections Connection pooling Eliminate 50% of overhead for small, short-lived connections Adaptive congestion windows Adapt transfer parameters based on network characteristics Adaptive congestion windows: Automatically changing window sizes based on network characteristics. This allows for the optimal transmission scenario given a customer’s network . Limited and fast retransmits: packet resends get priority over other packets using this feature. Limited and fast retransmits Ensure priority handling for packet resends © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

18 Application streamlining overcomes application protocol limitations
Typical application inefficiency Open WAN FID Read 1 Read 2 Applications often have more back-and-forth than TCP. In order to optimize how clients communicate with a certain application, Riverbed has implemented application-specific optimizations on top of its basic optimizations in order to achieve blazingly-fast performance for the most common data-intensive applications that use the WAN. DATA CENTER BRANCH OFFICE © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

19 Application streamlining overcomes application protocol limitations
Request WAN DATA CENTER BRANCH OFFICE Steelhead completes transaction locally Application Streamlining enables the central steelhead to act as a client and request data from the application server. This eliminates typical back-and-forth over the WAN and contains it to the LAN, where transactions are always very fast. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

20 Application streamlining overcomes application protocol limitations
The net effect is 65-98% reduction in WAN round trips Optimized WAN Transfer WAN DATA CENTER BRANCH OFFICE Steelhead completes transaction locally Application Streamlining enables the central steelhead to act as a client and request data from the application server. This eliminates typical back-and-forth over the WAN and contains it to the LAN, where transactions are always very fast. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

21 Application streamlining overcomes application limitations
CIFS Windows File Sharing & Windows-based applications MAPI Microsoft Exchange HTTP Web-based applications MS-SQL Database driven applications BACKUP & REPLICATION Important notes: We are making more of an effort to call out RCU functionality. Proxy file service simply gets a mention here – more info in backup if you need it. Simplified replication of remote servers (via RCU) PROXY FILE SERVICE Disconnected operations & integrated file sharing © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

22 Riverbed’s approach accelerates all TCP applications
Most applications can take advantage of the underlying Riverbed technologies to achieve some immediate acceleration. Some applications are optimized dramatically (FTP) with no additional Application Streamlining plug-ins. Other key applications are so important that Riverbed has implemented application-specific optimizations to achieve the performance enhancements that customers are looking for. Riverbed continues to add plug-ins for additional applications. Templates allow customers to implement modifications for in-house web-based applications. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

23 Management Streamlining
Transparency & high availability

24 Simplicity is key for a successful WDS deployment
Simple to deploy “I was very surprised by how simple the deployment was. I expected a complex integration, but it only required that I give each appliance an IP address. It was only a matter of minutes before I had the boxes up and running.” - Senior Systems Engineer, Investor AB Immediate impact across applications “We were quite surprised when one day our backup process took 25% of its usual time, because we were busy analyzing the effects of Riverbed Steelhead appliances on our FTP transfers. We made no changes to our software – the Steelhead appliances just started working right away.” - Director of IT, Mercury Interactive © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

25 More on transparent deployment
Proxy TCP WAN DATA CENTER BRANCH OFFICE Riverbed Steelhead appliances are designed to provide no disruption to your current network upon deployment. The appliances can be transparently deployed and will maintain the flow of all data on the network. No agents required on clients or servers No tunnels need to be configured Un-optimized traffic is automatically passed through © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

26 Steelhead appliances are designed for easy network integration
4-port 10/100/1000 Ethernet cards TCP connection forwarding Diverse in-path and out-of-path deployment options Deployment Flexibility Software-based Redundancy Serial clustering Parallel clustering Hot backups Important notes: Fail-to-wire Ethernet cards Dual power supply (optional) RAID (optional) Hardware-based Redundancy © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

27 Sample deployment (in-path)
LAN In-path with optional failover unit Steelhead Appliances 2, 3, 4, … NAS L2 Switch WAN/VPN WAN or VPN File Servers Router Firewall or VPN Mail Server In-path with 4-port card LAN WAN/VPN NAS Router Switch Router Steelhead Appliances File Servers Router Switch Router Mail Server Central Management Console (Optional) © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

28 Sample deployment (additional options)
Asymmetric routing Router Router Steelhead SH1 WAN/VPN Steelhead SH2 Router Router Steelhead Appliance Router Router Out-of-path (clustering optional) L4 Switch NAS WAN/VPN Router File Servers Firewall or VPN Steelhead Appliances Mail Server CLI & web-based mgmt. © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

29 RiOS supports centralized management
Riverbed Central Management Console Touchless configuration Aggregated reporting Group or individual configurations Scheduled operations Customizable reports and displays SNMP traps © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

30 Riverbed provides world-class expertise & support
Worldwide 24x7 availability Platinum, Gold, and Silver support levels Our team is relentlessly focused on customer success Highly valued and praised by customers “Deploying Steelhead appliances has been quick and easy – they can usually be installed in 15 minutes. When we had an issue that required technical support, they were fantastic and stuck with us until it was resolved. I’m very impressed with Riverbed’s support team, and recommend them highly.” – IT Director, Large Engineering Company © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

31 A customer study on Gensler Architecture
Background #1 architecture and design firm in USA Data and server sprawl Inability to collaborate among offices Results 70x faster CAD file sharing 75% reduction in WAN traffic Key benefits from deploying Riverbed Fast file-sharing eases collaboration Reduced cost of remote backup Enables “office-in-a-box” concept, which dramatically simplifies deployment of IT services at new offices “Our files and data now move more than 70 times faster between offices, giving us the ability to complete projects more quickly. We’ve also reduced our WAN traffic overall by 75%.” - Bruce Bartolf, CTO © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

32 A customer study on LG Electronics
Background Global deployment covers Asia, Europe, and Americas International bandwidth expensive and high latency Many applications unusable in remote offices Results Bandwidth utilization reduced up to 40% Applications run 20x faster Key benefits from deploying Riverbed US $500,000 savings monthly in bandwidth expenses Corporate applications usable in all locations Payback in just 5 months on bandwidth savings alone More than $US 6 Million in bandwidth savings alone. “I wish all IT projects could produce such impressive, tangible results.” - Network Engineer © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

33 A customer study on Electronic Arts
Background #1 worldwide video game developer Distributing 3GB - 6GB game software worldwide Results More than 60x improvement in FTP data transfers 90% reduction in WAN traffic Key benefits from deploying Riverbed Time to market accelerated Bandwidth utilization reduced “Riverbed’s technology is addicting. Our FTPs of large source code files went from twelve hours to about ten minutes.” - Global Network Architect © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

34 A customer study on Allen Matkins, LLP
Background Top-200 US law firm Slow applications resulting in lost productivity Data sprawl issues Results Applications run 40x faster Centralized CRM deployment Key benefits from deploying Riverbed $980,000 in annual productivity gains 20 non-billable hours per attorney per year saved Streamlined IT management Less attorney frustration “Using the Steelhead solution, we have eliminated more than 20 non-billable hours annually for the average attorney working in a remote office. Now we can provide our high-quality client experience while eliminating behind-the-scenes manual labor by our attorneys. That also translates into an estimated $980,000 in annual productivity gains for Allen Matkins.” - Frank Gillman, Director of IT © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

35 A customer study on Allied Capital Corporation
Background 4 Locations in the US Access to data slow for distributed users SEC Requirements demand data control & compliance Results Applications run 35x faster All file servers consolidated to HQ Key benefits from deploying Riverbed 7 month payback period Data consolidated – easier to find Data sprawl gone – data is secure More productive users worldwide “Within a matter of 24 hours, we were able to prove that we had significantly accelerated performance across the network. For example, opening a 10 MB excel file from DC to New York was reduced from 2 minutes and 59 seconds to just 5 seconds. Users even noticed performance increases in downloads and CRM access.” Will Cowdrick, Infrastructure Lead © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

36 Steelhead appliances are sized for your offices
Small Office Mid-Size Office Data Center/HQ Systemwide Visibility/Reporting Riverbed Central Management Console 520 1 Mbps optimized throughput 300 optimized TCP connections 2020 10 Mbps optimized throughput 2000 optimized TCP connections 5010 45 Mbps Kbps optimized throughput 4,500 optimized TCP connections New 200 1 Mbps optimized throughput 75 optimized TCP connections 1020 2 Mbps Kbps optimized throughput 625 optimized TCP connections 3010/3510 10/20 Mbps Kbps optimized throughput 2400/2400 optimized TCP connections Remember that the xx10 models are available as well. The xx20 models will not be formally annouced until the end of Q1. New 100 1 Mbps optimized throughput 25 optimized TCP connections © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

37 In summary, Riverbed will accelerate your business
Accelerates all key applications by up to 100x over the WAN WAN Reduces bandwidth utilization by 60% to 95% Enables successful IT consolidation Hundreds of customers in production today © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

38 Thank you for your time

39 Additional Information
Network Deployment Options Additional Features

40 Network Deployment Options

41 Remote office deployment detail (simple)
Branch Office LAN In-path deployment NAS WAN/VPN File Servers Router Firewall or VPN L2 Switch Steelhead Appliance Mail Server Branch Office LAN Out-of-path deployment NAS L2 or L4 Switch WAN/VPN File Servers Router Firewall or VPN Mail Server Steelhead Appliance © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

42 In-path deployment (detailed)
LAN Steelhead Appliances 2, 3, 4, … NAS L2 Switch WAN/VPN WAN or VPN File Servers Router Firewall or VPN Mail Server In-Path Deployment: Redundant routers and Steelheads with 4-port cards LAN WAN/VPN NAS Router Switch File Servers Router Switch Steelhead Appliances Mail Server Central Management Console (optional) © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

43 In-path deployment (detailed)
In-path with 4-port card LAN WAN/VPN Router NAS Router Switch Steelhead Appliance File Servers Router Router Switch Mail Server Central Management Console (optional) Virtual in-path via WCCP or PBR w/CDP LAN NAS WAN/VPN L3 Switch File Servers Router Firewall Or VPN Mail Server Steelhead Appliance © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

44 Out-of-path deployment (detailed)
LAN NAS L4 Switch WAN/VPN File Servers Router Firewall or VPN Mail Server Steelhead Appliance Out-of-path clustered LAN L4 Switch WAN/VPN NAS Router File Servers Firewall or VPN Steelhead Appliances CLI & web-based mgmt. Mail Server © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

45 Other deployment options
Virtual in-path (VLAN bridge) LAN Firewall or VPN NAS L3 Switch/Router WAN/VPN File Servers Router Mail Server Steelhead Appliance Asymmetric routing REMOTE OFFICE DATA CENTER Router Router Steelhead SH1 WAN/VPN Steelhead SH2 Router Router Steelhead Appliance Router Router © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

46 VPN Internet Private Network
PRIMARY DESIGN CENTER Osaka, Japan SALES OFFICE Paris, France WDS Appliance EUROPEAN SERVICE CENTER Reading, UK Q.A. Bangalore India WDS Appliance Filer WDS Appliance 768 kbps WDS Appliance E1 Filer 3x T1 2x T1 VPN Internet EUROPEAN DISTRIBUTION HUB Cork, Ireland Intelsat 255 kbps Uplink 1.5 Mbps Downlink 800 ms RTT 256 kbps Private Network WDS Appliance PROJECT SITE Kuala Lumpur, Malaysia T3 T3 (serverless) DSL PRIMARY DATA CENTER Denver, CO WDS Appliance WDS Appliance DISASTER RECOVERY SITE Jersey City, New Jersey WDS Appliance OC-3 Storage Storage Filers Tape Backup WDS Appliance File Servers Web Servers Mail Servers File Servers Web Servers Mail Servers WDS Appliance © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

47 Additional Features

48 High-Speed TCP – for high bandwidth, high latency connections
Regular TCP OC12 Bandwidth / Throughput Time Lossy networks cause traditional TCP transfers to ramp up slowly and ramp back down at the first sign of packet loss. This causes the jagged sawtooth pattern in red. Riverbed enables multiple TCP connections for each transfer, allowing more efficient data transfers that take advantage of the large amount of bandwidth available. Implementation of Latest Research in TCP Community High speed TCP; Sally Floyd, et. al. Optimization for High Bandwidth-Delay Product Links “Long Fat Networks” (LFNs) Bandwidth is Not Scarce on LFNs (T3, OC3, OC12, etc...) Reduces Effects of TCP Algorithms Congestion Control Slow Start Increases Throughput on LFNs by 10x to 20x From Mbps to Mbps on 150ms RTT Links Enable full utilization of high bandwidth connection with 15+ ms latency Overcome latency while still maintaining safe congestion control Ramp up faster, slow down less than regular TCP Approach sanctioned by the IETF, unlike proprietary protocols © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

49 Filling an OC-12 connection
Test Scenario Bandwidth RTT Latency Throughput A Baseline 622 Mbps 15 ms 36 Mbps With Steelhead Appliances 600+ Mbps B 100 ms 5 Mbps More than 100x faster Sample FTP Transfers (3 GB file) WAN Util (millions bits/second) Time (seconds) © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

50 Proxy File Service (PFS) overcomes WAN failure
Standard Steelhead appliance operation Access to centralized file server over the WAN Continued access to files after WAN failure X WAN Read-write access to PFS – local shares Local mode – server replicated back to data center PFS DATA CENTER BRANCH OFFICE File Servers Read-write access to central Server – global shares Proxy File Services are NOT a substitute for WAFS. Steelhead appliances accomplish WAFS just like they accomplish transfers of other data or applications. That’s what is so powerful about our approach. By dealing with bytes, independent of the application, we can affect all applications (including files!) and even share information across applications. Proxy File Service adds these built in capabilities: Continued access to information even if the WAN is down A built-in file server for local files Automated backup to central servers “Broadcast” capabilities to prepopulate popular files into remote Steelhead Appliances Whether or not the customer plans to turn PFS on, they will get accelerated access to files through Riverbed’s key optimizations. Read-only access to PFS – broadcast shares Broadcast mode – files pushed out to remote office PFS © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

51 Transparent pre-population prepositions popular content
Scheduled Delivery/Update Files & Data Reconstructed Response WAN DATA CENTER BRANCH OFFICE Virtual Window Expansion (VWE) Pre-populated files & s are distributed before demand Only changes are sent over the WAN Access is fast & local © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL

52 Data streamlining overcomes bandwidth limitations (alt. ver.)
Reconstructed files & data Request Files & data WAN DATA CENTER BRANCH OFFICE Data Streamlining uses a proprietary algorithm to break up the data into small referenceable data chunks and store them in the central steelhead. The first time a file is sent through the network, all the data and reference links to the data are sent to the remote steelhead. (A “cold send”) The cold send is still optimized with the TCP and application optimizations discussed on the next slide. Next time data is requested the central steelhead needs to simply send references to data on the remote steelhead. If parts of the data has changed, the steelhead simply sends the chunks of data that have changed, with new references. The file is then reconstructed using a combination of the changed and unchanged data. Only new bytes compressed & sent over the WAN 16-Byte references communicate megabytes of existing data 60-95% reduction of WAN Utilization © 2006 RIVERBED TECHNOLOGY, INC – CONFIDENTIAL


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