A Concept of Datamigration in a Distributed, Object-Oriented Knowledge Base

This article presents the development of a concept for the distribution and migration of data to several databases within a distributed knowledge base Thus a concept for a load dependent and application speci c migration of data is introduced which takes into con sideration the number and sort of accesses to the data The main part of the migration method is a distri bution function which generates an optimal distribu tion of data on the databases according to the de ned aims It uses all information of the pro le of accesses and evaluates this information with the help of several decision parameters of di erent priority A quick reac tion on changes in the pro le of accesses is guaranteed by a cycle protocol which consists of three parallelly running phases with a sort of pipeline structure