Distributed Systems Handbook

This 1978 handbook from Digital Equipment Corporation serves as a comprehensive guide to understanding, planning, designing, and implementing distributed computer systems. It highlights the increasing accessibility and impact of computers as tools for information management across diverse enterprises, moving beyond traditional centralized processing.

The document first outlines the benefits of computerized information systems in terms of cost-effectiveness, accuracy, timeliness, and direct data access, tracing the evolution from early batch processing to interactive systems like timesharing and transaction processing. A key concept introduced is the "work station" model, which facilitates breaking down complex information systems into manageable, functional units that communicate through "transactions" and messages, thereby simplifying design and management.

The handbook emphasizes the crucial roles of general managers, EDP managers, and technical specialists in a collaborative design process. It delves into key management decisions, such as balancing service versus cost and control versus usability, and discusses the selection of hardware, communication techniques, and vendors, often favoring networked minicomputers for their flexibility and responsiveness to local needs.

Technical sections cover data communications and networks in detail, including functional layers, error control, and the architecture of DECnet. It also examines the technological forces (like advances in integrated circuits and magnetic disk storage) driving the growth of distributed systems. Critical design goals are explored, such as system availability, data integrity, responsiveness, security, privacy, and adaptability, along with techniques for achieving these objectives, including redundancy, data recovery, caching, and logical security measures.

Concluding with a "peek at the future," the handbook anticipates widespread digital data transmission, office automation, and fully integrated information systems. It provides numerous practical case studies from various industries like laboratory management, healthcare, manufacturing, finance, retail, and government, illustrating real-world applications of distributed systems and Digital Equipment Corporation's products. The core message underscores that successful distributed systems require careful planning, strong management involvement, and a collaborative team effort.