1 Introduction 2 Architectures 3 Processess 4 Communication 5 Naming 6 Synchronization 7 Consistency and replication 8 Fault tolerance 9 Security 10 Distributed object-based systems 11 Distributed file systems 12 Distributed web-based systems 13 Distributed coordination-based Index

• First part of the book dedicates one chapter to each of seven key principles of all distributed systems: communication, processes, naming, synchronisation, consistency and replication, fault tolerance, and security. – Gives students an understanding of the key principles, paradigms, and models on which all distributed systems are based. • Second part of the book devoted to real-world distributed case studies: – Includes examples of object-based, document-based, file-based, and coordination-based systems including Corba, DCOM, Globe, NFS v4, Coda, WWW, and Jini. – Because Part II is organised along the same seven key principles that are discussed in the first part, students not only learn how state-of-the-art real-world systems and middleware work, but are also able to compare the different systems easily. • Numerous end-of-chapter exercises – Explain how the various principles of distributed systems work in practice. • “Big picture” concepts and many technical details: – Presented in the clear, entertaining style unique to Tanenbaum and van Steen. – Helps students learn the foundation of distributed operating systems and how things work in the real world. • Excellent coverage of timely, advanced distributed systems topics – Examines security, payment systems, recent Internet and Web protocols, scalability, and caching and replication.

• A completely new chapter on architecture added to address the principle of organizing distributed systems: – Covers the logical organization into software components along the lines of architectural styles (layers, object-orientation, event orientation, and data orientation) – Discusses the physical organization of distributed systems, addressing issues such as client/server systems and peer-to-peer systems – Interweaves the two types of organization by examining self-managing distributed systems, which form an important part of what are known as autonomic systems. • Extensive new material on peer-to-peer systems: – Discusses structured as well as unstructured peer-to-peer systems – Explains how they work and how they are being applied to solve challenging problems in various domains, in various sections throughout. • New material on Grid computing and Web services: – Reflects the emergence of this increasingly important type of distributed system in the form of large-scale computing and information systems, which are often deployed across the Internet. – Web-based systems, including Web services, are treated more thoroughly in this revision. • New material on virtualization: – Reflects the growing importance of virtual machines as a component of distributed systems – Adds a separate section discussing different forms of virtualization and how it is applied in practical settings. • Addition of application-level multicasting: – Adds a separate section on how (large scale) group communication can be set up in a decentralized fashion, using structured as well as unstructured peer-to-peer systems. • Improved material on clock synchronization – Now addresses clock synchronization in very large systems, and updates the material with a description of GPS systems (relates directly to GPS-based services that students use in practice). • Updated material on data-centric consistency: – Removes models that are exclusively used only in distributed shared memory systems – Adds simpler models on continuous consistency, which is more applicable to modern distributed information systems. • Updated chapter on object-based distributed systems: – Now takes examples from existing systems for each principle separately – Not only provides better illustrations of those principles, but makes the material more attractive for students to learn and for instructors to teach. • Updated chapters on file systems and Web systems coordination. • Deleted information on: – distributed garbage collection – distributed shared memory – lotus notes as case – a number of specific distributed algorithms.