![]() Although the early distributed database systems architectures followed the peer-to-peer paradigm, the modern incarnation of these systems have fundamentally different characteristics, so they deserve in-depth discussion in a chapter of their own. These systems have become an important and interesting architectural alternative to classical distributed database systems. Peer-to-peer data management is discussed in depth.This topic is now covered in a separate chapter where we provide an in-depth discussion of the protocols and how they can be integrated with transaction management. The previous editions had only brief discussion of data replication protocols.There is one chapter that focuses on the integration process, while another chapter discusses querying over multidatabase systems. Database integration and querying is now treated in much more detail, reflecting the attention these topics have received in the community in the past decade.The end result is a book that has been heavily revised - while we maintained and updated the core chapters, we have also added new ones. We kept the fundamental principles that have been there since the first edition, but they are updated. The book is available from Springer, Barnes & Noble, Chapters-Indigo (in Canada), and, of course, Amazon.
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