Advanced Database Systems: From Monoliths to Unbundled Components.
Jürgen Zimmermann, Thomas Kudraß · 1996
The unbundling of components from a (monolithic) database management system is an upcoming research topic. In this paper we describe the origin of unbundling techniques: unbundling in operating systems like SunOS 5.x and construction of a component-oriented database system like Open OODB from Texas Instruments, Inc. by using the EXODUS toolkit. Afterwards we discuss the commercial OODBMS ObjectStore to identify unbundling issues. In the core part we present the active database systems REACH and SAMOS from an unbundling point of view. Finally we introduce an objectoriented mediator for relational legacy systems and show that such a component also can be seen as unbundled. Keywords: unbundling, architecture, components. 1 Introduction Unbundling is an upcoming buzzword in the database community. However, it is not clear what does it mean when a component is declared as unbundled, how can components be identified for unbundling, and how should components be designed to make them unbundl...