Content Delivery Networks: Fundamentals, Design, and Evolution

The definitive guide to developing robust content delivery networks

This book examines the real-world engineering challenges of developing robust content delivery networks (CDNs) and provides the tools required to overcome those challenges and to ensure high-quality content delivery that fully satisfies operators’ and consumers' commercial objectives. It is informed by the author’s two decades of experience building and delivering large, mission-critical live video, webcasts, and radio streaming, online and over private IP networks.

Following an overview of the field, the book cuts to the chase with in-depth discussions—laced with good-natured humor—of a wide range of design considerations for different network topologies. It begins with a description of the author's own requirement filtration processes. From there it moves on to initial sketches, through considerations of stakeholder roles and responsibilities, to the complex challenges of managing change in established teams. Agile versus waterfall considerations within large blue chip companies, security, commercial models, and value chain alignment are explored in detail. Featured throughout the book are numerous "what if" scenarios that help provide a clear picture of the wide spectrum of practical contexts for which readers may be tasked with building and implementing a CDN. In addition, the book:

• Discusses delivery of live, catch-up, scheduled on-demand, TVOD and SVOD
• Offers insights into the decisions that can to be made when architecting a content distribution system over IP-based networks
• Covers CDN topologies, including Edge-Caching, Streaming-Splitting, Pure-Play, Operator, Satellite, and Hybrid
• Examines computer hosting and orchestration for dedicated appliances and virtualization
• Includes real-world cases covering everything from IETF, regulatory considerations, and policy formation, to coding, hardware vendors, and network operators
• Considers the future of CDN technologies and the market forces driving its evolution

Written by a back-room engineer for back-room engineers, Content Delivery Networks gets readers up to speed on the real-world challenges they can face as well as tried-and-true strategies for addressing those challenges in order to ensure the delivery of the high-quality content delivery networks that clients demand and users expect. 

《開發強大內容傳遞網絡的權威指南》

本書探討了開發強大內容傳遞網絡（CDN）所面臨的現實工程挑戰，並提供了克服這些挑戰並確保高質量內容傳遞的工具，以滿足運營商和用戶的商業目標。作者憑藉二十年來在構建和提供大型、關鍵性的實時視頻、網絡廣播和私有IP網絡上的經驗，為讀者提供了寶貴的見解。

本書首先概述了該領域，然後深入討論了不同網絡拓撲的設計考慮，並以幽默的方式進行了說明。從作者自己的需求過濾過程開始，再到初步草圖，再到利益相關者的角色和責任，最後到在已建立的團隊中管理變化的複雜挑戰。本書詳細探討了大型藍籌公司中的敏捷開發和瀑布開發的考慮因素，以及安全性、商業模型和價值鏈對齊等問題。全書還提供了許多“假如”情景，幫助讀者清晰地了解他們可能面臨的各種實際情境，以構建和實施CDN。此外，本書還包括以下內容：

- 討論實時、追趕、預定點播、TVOD和SVOD的傳遞
- 提供在基於IP的網絡上設計內容分發系統時可以做出的決策的見解
- 詳細介紹了CDN的拓撲，包括邊緣緩存、流媒體分割、純播放、運營商、衛星和混合等
- 檢視了專用設備和虛擬化的計算機託管和編排
- 包含了從IETF、監管考慮因素和政策制定，到編碼、硬件供應商和網絡運營商的真實案例
- 考慮了CDN技術的未來和推動其演進的市場力量

《內容傳遞網絡》是一本由幕後工程師為幕後工程師撰寫的書籍，讓讀者了解他們可能面臨的現實挑戰，並提供了解決這些挑戰的可靠策略，以確保客戶要求並且用戶期望的高質量內容傳遞網絡的交付。