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Part 6 Distributed DBMSs and Replication
Part 6 of the book examines distributed DBMSs and object-based DBMSs. Distributed
database management system (DDBMS) technology is one of the current major developments
in the database systems area. The previous chapters of this book concentrate on
centralized database systems: that is, systems with a single logical database located at one
site under the control of a single DBMS.
Chapter 22 discusses the concepts and problems of distributed DBMSs, where users can
access the database at their own site and also access data stored at remote sites.
Chapter 23 examines various advanced concepts associated with distributed DBMSs.
In particular, it concentrates on the protocols associated with distributed transaction
management, concurrency control, deadlock management, and database recovery. The
chapter also examines the X/Open Distributed Transaction Processing (DTP) protocol.
The chapter concludes by examining data distribution within Oracle.
Chapter 24 discusses replication servers as an alternative to distributed DBMSs and
examines the issues associated with mobile databases. The chapter also examines the data
replication facilities in Oracle.