Transaction And Catalog Management Of The Distributed File Management System Disco

This paper presents the structure and concepts of two main functional components of the distributed file management system DISCO: The component ´access management for logical files´ is responsible for the access to the distributed data. In order to achieve parallel transaction processing a page buffer system is maintained. It is shown how this page buffer system fits into the recovery concepts of DISCO. The main tasks of the ´management of the catalog for logical files´ are to provide file description and mapping. The structure of the catalog system and the mechanism to preserve consistency of redundant file descriptions are described.