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Web Caching

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Web Caching

Web Caching

300 pages, parution le 01/08/2001

Résumé

On the World Wide Web, speed and efficiency are vital. Users have little patience for slow web pages, while network administrators want to make the most of their available bandwidth. A properly designed web cache reduces network traffic and improves access times to popular web sites—a boon to network administrators and web users alike.

Web Caching hands you all the technical information you need to design, deploy, and operate an effective web caching service. It starts with the basics of how web caching works, from the HTTP headers that govern cachability to cache validation and replacement algorithms.

Topics covered in this book include:

  • Designing an effective cache solution
  • Configuring web browsers to use a cache
  • Setting up a collection of caches that can talk to each other
  • Configuring an interception cache or proxy
  • Monitoring and fine-tuning the performance of a cache
  • Configuring web servers to cooperate with web caches
  • Benchmarking cache products

The book also covers the important political aspects of web caching, including privacy, intellectual property, and security issues.

Internet service providers, large corporations, or educational institutions—in short, any network that provides connectivity to a wide variety of users—can reap enormous benefit from running a well-tuned web caching service. Web Caching shows you how to do it right.

Contents

Preface

Chapter 1. Introduction
    Web Architecture
    Web Transport Protocols
    Why Cache the Web?
    Why Not Cache the Web?
    Types of Web Caches
    Caching Proxy Features
    Meshes, Clusters, and Hierarchies
    Products

Chapter 2. How Web Caching Works
    HTTP Requests
    Is It Cachable?
    Hits, Misses, and Freshness
    Hit Ratios
    Validation
    Forcing a Cache to Refresh
    Cache Replacement

Chapter 3. Politics of Web Caching
    Privacy
    Request Blocking
    Copyright
    Offensive Content
    Dynamic Web Pages
    Content Integrity
    Cache Busting and Server Busting
    Advertising
    Trust
    Effects of Proxies

Chapter 4. Configuring Cache Clients
    Proxy Addresses
    Manual Proxy Configuration
    Proxy Auto-Configuration Script
    Web Proxy Auto-Discovery
    Other Configuration Options
    The Bottom Line

Chapter 5. Interception Proxying and Caching
    Overview
    The IP Layer: Routing
    The TCP Layer: Ports and Delivery
    The Application Layer: HTTP
    Debugging Interception
    Issues
    To Intercept or Not To Intercept

Chapter 6. Configuring Servers to Work with Caches
    Important HTTP Headers
    Being Cache-Friendly
    Being Cache-Unfriendly
    Other Issues for Content Providers

Chapter 7. Cache Hierarchies
    How Hierarchies Work
    Why Join a Hierarchy?
    Why Not Join a Hierarchy?
    Optimizing Hierarchies

Chapter 8. Intercache Protocols
    ICP
    CARP
    HTCP
    Cache Digests
    Which Protocol to Use

Chapter 9. Cache Clusters
    The Hot Spare
    Throughput and Load Sharing
    Bandwidth

Chapter 10. Design Considerations for Caching Services
    Appliance or Software Solution
    Disk Space
    Memory
    Network Interfaces
    Operating Systems
    High Availability
    Intercepting Traffic
    Load Sharing
    Location
    Using a Hierarchy

Chapter 11. Monitoring the Health of Your Caches
    What to Monitor?
    Monitoring Tools

Chapter 12. Benchmarking Proxy Caches
    Metrics
    Performance Bottlenecks
    Benchmarking Tools
    Benchmarking Gotchas
    How to Benchmark a Proxy Cache
    Sample Benchmark Results

Appendix A. Analysis of Production Cache Trace Data

Appendix B. Internet Cache Protocol

Appendix C. Cache Array Routing Protocol

Appendix D. Hypertext Caching Protocol

Appendix E. Cache Digests

Appendix F. HTTP Status Codes

Appendix G. U.S.C. 17 Sec. 512. Limitations on Liability Relating to Material Online

Appendix H. List of Acronyms

Glossary

Index

Caractéristiques techniques du livre "Web Caching"

  PAPIER
Éditeur(s) O'Reilly
Auteur(s) Duane Wessels
Parution 01/08/2001
Nb. de pages 300
Format 17,8 x 23,4
Couverture Broché
Poids 550g
Intérieur Noir et Blanc
EAN13 9781565925366
ISBN13 978-1-56592-536-6

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