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This book addresses issues related to managing data across a distributed database system. It is unique because it covers traditional database theory and current research, explaining the difficulties in providing a unified user interface and global data dictionary. Design, transaction management and concurrency control are different for distributed databases, as are replication control, fault tolerance, and distributed query optimization. The book gives implementer guidance on hiding discrepancies across systems and creating the illusion of a single repository for users. The book also includes three sample frameworks-implemented using J2SE with JMS, J2EE, and Microsoft .Net-that readers can use to learn how to implement a DDBMS and explore some of the implementation issues. Each framework works with a variety of DBMSs and includes an example extension.

Contents: Preface. Introduction. 1. Data distribution alternatives. 2. Database control. 3. Query optimization. 4. Controlling concurrency. 5. Deadlock handling. 6. Replication control. 7. Failure and commit protocols. 8. DDBE security. 9. Data modeling overview.10. Logical data models. 11. Traditional DDBE architectures. 12. New DDBE architectures. 13. DDBE platform requirements. 14. The JMS starter kit. 15. The J2EE platform. 16. The J2EE starter kit. 17. The microsoft .NET platform. 18. The DNET starter kit. Reference. Exercises. Index.