A Practical Guide to Content Delivery Networks, Second Edition

A Practical Guide to Content Delivery Networks, Second Edition

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Features

  • Supplies a clear understanding of the framework and individual layers of design, including caching and load balancing
  • Describes the terminology, tactics, and potential problems when implementing a CDN
  • Examines cost-effective ways to load balance web service layers
  • Explains how application servers connect to databases and how systems will scale as volume increases
  • Illustrates the impact of video on data storage and delivery, as well as the need for data compression
  • Covers Flash and the emerging HTML5 standard for video
  • Summary

    Following in the tradition of its popular predecessor, A Practical Guide to Content Delivery Networks, Second Edition offers an accessible and organized approach to implementing networks capable of handling the increasing data requirements of today's always on mobile society. Describing how content delivery networks (CDN) function, it provides an understanding of Web architecture, as well as an overview of the TCP/IP protocol suite.

    The book reports on the development of the technologies that have evolved over the past decade as distribution mechanisms for various types of Web content. Using a structural and visual approach, it provides step-by-step guidance through the process of setting up a scalable CDN.

    • Supplies a clear understanding of the framework and individual layers of design, including caching and load balancing
    • Describes the terminology, tactics, and potential problems when implementing a CDN
    • Examines cost-effective ways to load balance web service layers
    • Explains how application servers connect to databases and how systems will scale as volume increases
    • Illustrates the impact of video on data storage and delivery, as well as the need for data compression
    • Covers Flash and the emerging HTML5 standard for video

    Highlighting the advantages and disadvantages associated with these types of networks, the book explains how to use the networks within the Internet operated by various ISPs as mechanisms for effectively delivering Web server based information. It emphasizes a best-of-breed approach to building your network to allow for an effective CDN to be built on practically any budget. To help you get started, this vendor-neutral reference explains how to code Web pages to optimize the delivery of various types of media. It also includes examples of successful approaches, from outsourcing to do it yourself.

    Table of Contents

    Introduction to Content Delivery Networking
    The Modern Content Delivery Network 
         Advantages 
         Disadvantages
    Evolution 
         Client-Server Computing
         Use of Video Servers
         Server Network Architecture
         The Road to Push Technology
         Pull Technology
         Multicast
         Push Technology
    Content Delivery Networking
         Client-Server Operations on the Internet 
         Client Server Operating on the Same Network 
         Client-Server Operations on Different Networks 
         Peering Point 
         Video Considerations

    Client-Server Models 
    Overview
    Client Operations
         URLs
         HTML
         HTTP
         Browser Programs
    Server Operations
    Distance Relationship

    Understanding TCP/IP
    The TCP/IP Protocol Suite
         Protocol Suite Components 
         Physical and Data-Link Layers
         The Network Layer
         The Transport Layer
    The Domain Name System
         Need for Address Resolution 
         Domain Name Servers 
         Top-Level Domain 
         DNS Operation 
         Configuring Your Computer 
         Root Name Servers 
         The NSLookup Tool 
         Expediting the Name Resolution Process 
         DNS Resource Records

    The CDN Model
    Why Performance Matters 
         Economics of Poor Performance 
         Predictability 
         Customer Loyalty 
         Scalability
         Flexibility 
         Company Perception 
    Examining Internet Bottlenecks 
         Entry and Egress Considerations 
         Access Delays
         Egress Delays 
         Benefits of Edge Servers 
         Peering Points
    Edge Operations 
         CDN Operation 
         The Akamai Network
         Edge Side Includes
         Edge Side Includes for Java 
         Statistics
    The Akamai HD Network 
         Using the HD Network with Flash

    Caching and Load Balancing
    Caching 
         Browser Cache 
         Other Types of Web Caches
         Application Caching 
         Cache Operation 
         Cache Control Methods
         Windows DNS Caching Problems 
         Viewing HTTP Headers 
         Considering Authentication 
         Enhancing Cacheability
         Load Balancing 
         Types of Load Balancing 
         Rationale 
         Load Balancing Technique
         DNS Load Balancing 
         DNS Load-Sharing Methods
         Managing User Requests

    The CDN Enterprise Model
    Overview 
         Rationale
    Traffic Analysis 
         Using Web Logs
         Using Logging Strings 
         Web-Log Analysis 
         Top Referring Domains
         Considering Status Codes 
         Web-Log Statistics 
         Reverse Mapping 
         SOA Record Components 
         Origination Country 
          Originating Time Zone 
         Other Statistics 
         Other Analysis Tools 
         Cookies
         Other Logging Information 
         Microsoft’s Performance Monitor
         Using a Network Analyzer 
         Other Tools to Consider
    Content Delivery Models 
         Single-Site, Single-Server Model
         Single-Site, Multiple-Server Model
         Multiple-Sites, Single-Server per Site Model
         Multiple-Site, Multiple-Server per Site Model
         An In-Between Model

    Web-Hosting Options 
    Rationale 
         Cost Elements and Total Cost
         Performance Elements 
         Server-Side Language Support 
         Web-Service Tools 
         The Importance of Images 
         Back-End Database Support 
         Facility Location(s)
         Types of Web-Hosting Facilities 
         Dedicated Hosting 
         Shared Server Hosting
         Colocated Hosting 
         Evaluation Factors

    Author Bio(s)

    Gilbert Held is an award winning author, lecturer and educator. Gil graduated from Pennsylvania Military College, earning a BS in Electrical Engineering. In 1966 Gil earned a MSEE degree from the New York University School of Engineering and Science, and received an MSTM and MBA degrees from The American University in Washington, DC.

    Gil was Chief of Data Communications for the US Office of Personnel Management for 20 years, until a reorganization and consolidation of data centers resulted in the closing of the Macon Data Center. Gil remained on staff in Macon and was tasked with developing OPM’s Web presence on the Internet and was responsible for designing, acquiring and constructing OPM’s presence on the Internet for which he received the Directors Award.

    Between 1977 and the present Gil has authored over 100 technical books covering personal computing, data communications and business In addition, Gil authored over 500 technical articles and for 17 years has served as the Editor in Chief of the Wiley International Journal of Network Management. In recognition of his excellence in writing Gil twice was awarded the Interface Karp award. Gil has also received a variety of awards ranging from various charities to different publishers, such as Federal Week which considered him as one of the top 50 persons in Government and Academia.

    In addition to authoring books, Gil has taught 14 different graduate level courses and was selected by the Vice President to represent the United States at the Popov Conference in Moscow and represented the United States at the Jerusalem Conference on Information Technology. Gil has appeared on the NBC Evening News and his technical book sales have exceeded a million copies.

    Editorial Reviews

    Held, a networking expert and lecturer, presents this guide to the principles of content delivery networks (CDN). Built to provide multiple, easily accessible nodes for dispensing high bandwidth content (web video for instance) without overloading internet backbone capacities, CDNs help reduce the bottlenecks that occur when popular content resides on a single over-accessed server. This volume begins with an overview of client and server models of information networking and the TCP/IP Internet protocols and proceeds through an examination of the CDN model, caching and load balancing and concludes with a discussion of CDN in an enterprise setting and web hosting options with CDN. Intended for network architects and server administrators, this second edition includes extended information on web video including Flash and new HTML 5 standards.
    —In Research Book News, booknews.com, February 2011

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