Alina Stasiecka, Ewa Stemposz, Kazimierz Subieta

Distributed Object-Oriented Database Systems

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Abstract

The report contains an overview of distributed object-oriented database systems. The basic goals, assumptions, concepts and methods related to this subject are outlined. Typical architectures of distributed databases (client-server and client-broker-server architectures) are discussed. Problems connected with resources distribution (among others replications, object migration, transaction processing, query optimization, mediators, wrappers, views) are presented. Although the main emphasis was put on notions and methods related to object-oriented database systems the report contains also a short description of component technologies, such as CORBA

Key words: object, distributed object management, object distribution, object migration, client-server architecture, client-broker-server architecture, query processing, transaction management, component technologies, CORBA, view, wrapper, mediator.