©2000 EMBA All rights reserved. 分散式系統 Presentation Fast Content Delivery EMBA 資管所 陳建廷 December 20, 2000

©2000 Taiwan University EMBA. All rights reserved. 2 Fast Content Delivery 1. Why ? 2. Industry & Marketing 3. Technology Overview 4. Typical Company 1. Akamai 2. ArrowPoint 5. Future

©2000 Taiwan University EMBA. All rights reserved. 3 Fast Content Delivery – Why 1. WWW (World Wide Wait) 2. Critical 8 seconds rule -Visitors abandon after having to wait 8 seconds or longer 3. Companies lose money due to slow Web sites – more than $ 4 billion annually (Zona Research)

©2000 Taiwan University EMBA. All rights reserved. 4 Fast Content Delivery – Industry 1. CDN (Content Delivery Network) - Company provide network & services - Typical vender : Akamai, Digital-Island 2. Companies offer content delivery S/W & H/W solutions -Typical vender : Arrowpoint, F5, Inktomi,.. 3. Satellite-base distribution services - Edgix, iBeam, …

©2000 Taiwan University EMBA. All rights reserved. 5 Fast Content Delivery – Marketing 1. Content Delivery Network Marketing size Source :HTRC.com (High Tech resource Consulting Group)

©2000 Taiwan University EMBA. All rights reserved. 6 Fast Content Delivery – Marketing 2. The market for content delivery services will grow from $428 million (2000) to 24.6 billion (2004) - JP Morgan 3. “ I think you are going to see an explosive growth in Web caching devices (on the network) and significant spending on the back end “ - Michael Capellas, Compaq CEO, 5/16/2000, eWeek

©2000 Taiwan University EMBA. All rights reserved. 7 Fast Content Delivery – Marketing Tier 1 Content site In-Housing Model Hosting Provider Model CDN Service Model Cost Per Year $1,795,000$ 1,394,000$ 1,234,000 Source :HTRC.com (High Tech resource Consulting Group)

©2000 Taiwan University EMBA. All rights reserved. 8 Fast Content Delivery – Overview

©2000 Taiwan University EMBA. All rights reserved. 9 Fast Content Delivery – Questions Is it a good solutions to increase the bandwidth for the problem ? -The growth rate of the bandwidth the is always slower than the growth rate of the Internet -The cost of the the bandwidth is the concern So that to in crease the bandwidth is only to transfer one problem to another place

©2000 Taiwan University EMBA. All rights reserved. 10 Fast Content Delivery – Web Caching 1. Caching is everywhere -CPU has the caching (L1 or L2 Cache is s quicker buffer between slow DRAM and CPU. ) -HDD has the caching (from fast interface response without accessing the slower R/W component) -System has the caching (RAM cache, HDD cache) 2. Internet use Web caching to fast the content delivery -Put the content in cache server which closer to the users to reduce the Internet latency 3. ISP also benefit from the Web caching -ISP don’t need to waste the resource to reload the caching data from original server so that the cost was saved and also can maintain the enough bandwidth

©2000 Taiwan University EMBA. All rights reserved. 11 Fast Content Delivery – Web Caching Three method for Web caching - Proxy Caching - Transparent Caching - Reverse Caching

©2000 Taiwan University EMBA. All rights reserved. 12 Fast Content Delivery – Proxy Caching Proxy Caching Advantage : - Robustness - User Control - Ubiquitous browser support Disadvantage : - Administration - Lack of Central control

©2000 Taiwan University EMBA. All rights reserved. 13 Fast Content Delivery – Transparent Caching Transparent Caching Advantage : - Simplified administration - Central control Disadvantage : - Robustness - User control - Browser dependency

©2000 Taiwan University EMBA. All rights reserved. 14 Fast Content Delivery – Reverse Caching Reverse Caching Advantage : - Simplified administration - Robustness - Central control Disadvantage : - Administration - Complexity

©2000 Taiwan University EMBA. All rights reserved. 15 Fast Content Delivery – Akamai

©2000 Taiwan University EMBA. All rights reserved. 16 Fast Content Delivery – Akamai - Akamai is a unique marriage of scientific and Internet mind - Management Team : -George Conrades – CEO -Jonathan Seelig – VP, Strategy and Corp development -Tom Leighton – Chief Scientist -Daniel Lewin – Chief Technology Officer - The company was created base on a questions issues by Tim Berners-Lee (WWW inventor) in MIT “ How to deliver faster Web content with better a faster idea ? “

©2000 Taiwan University EMBA. All rights reserved. 17 Fast Content Delivery – Akamai Business Model Akamai Customers Akamai Data Delivery Technology Internet Connection ICPPortalWideband InfrastructureISPCommunication Service Provider Internet users

©2000 Taiwan University EMBA. All rights reserved. 18 Fast Content Delivery – Akamai - Major Product : FreeFlow -Provide the technology which can improve the Internet transfer rate, quality and stability, provide service to ICP, ISP and e- commerce customers -With the Akamai technology, no matter it is image, voice or streaming media, the users can reach them through the closest web site no need to access the original web server

©2000 Taiwan University EMBA. All rights reserved. 19 Fast Content Delivery – Akamai - Current scale -2,800 customers worldwide, 6,000 servers in 54 countries directly connected within 335 different communication networks -Increase 300 servers per month

©2000 Taiwan University EMBA. All rights reserved. 20 Fast Content Delivery – Akamai

©2000 Taiwan University EMBA. All rights reserved. 21 Fast Content Delivery – Akamai

©2000 Taiwan University EMBA. All rights reserved. 22 Fast Content Delivery – ArrowPoint

©2000 Taiwan University EMBA. All rights reserved. 23 Fast Content Delivery – ArrowPoint - 由臺灣交大畢業的留學生吳錦城於 1997 年 所創辦, 2000 年 3 月於 Nasdaq 上市 - 曾被 評選為網路世界 前二十五大無名英雄之一 曾被 評選為網路世界 前二十五大無名英雄之一 - ArrowPoint Communications 於 2000 年 5 月以高達 57 億美元金額為 Cisco 所購併 - 第一家推出第七層交換器的廠商

©2000 Taiwan University EMBA. All rights reserved. 24 Fast Content Delivery – ArrowPoint

©2000 Taiwan University EMBA. All rights reserved. 25 Fast Content Delivery – ArrowPoint

©2000 Taiwan University EMBA. All rights reserved. 26 Fast Content Delivery – ArrowPoint The problem of the Layer 4 switch -Lack of visibility to multiple host addresses using the same IP address -Lack of visibility to non-cacheable content -In compatibility with older browers

©2000 Taiwan University EMBA. All rights reserved. 27 Fast Content Delivery – ArrowPoint The benefit of the Arrowpoint “Content Smart caching “ Switching -Improve the cache hit rate -Bypass the caches entirely for the requests for non-cacheable content which significantly reduces the cost of the transparent cache deployment while improving overall user response time -Solve the disadvantage of the reverse caching

©2000 Taiwan University EMBA. All rights reserved. 28 Fast Content Delivery – Future -To link with ISI (Internet Storage Infrastructure ) service to provide improved reliability, flexibility and economics -ISI venders together with CDN venders will be able to offer enhanced features such as geographic mirroring, load balancing and a global file-system that will deliver even faster Web content.

©2000 Taiwan University EMBA. All rights reserved. 29 Fast Content Delivery – Future The Evolution of the storage infrastructure

©2000 Taiwan University EMBA. All rights reserved. 30 Fast Content Delivery – Future Current Infrastructure

©2000 Taiwan University EMBA. All rights reserved. 31 Fast Content Delivery – Future Future ISI (Internet Storage Infrastructure )Service

©2000 Taiwan University EMBA. All rights reserved. 32 Fast Content Delivery – Future ISI + CDN

©2000 Taiwan University EMBA. All rights reserved. 33 The End Thanks !