Abstract
Since in broadband networks the whole contents of a database can be transferred from one site to another in a short period, database migration is expected to be one of the most powerful database operations in future distributed database systems. In an environment with database migration, it is necessary to develop a method to manage the location of each database so as to allow accessing of migrating databases. In this paper, we first propose several database location management methods, some of which make use of the features of ATM (Asynchronous Transfer Mode) networks. Then, we compare the performance of these methods by simulation study for various system parameters, such as the frequency of queries and of database migration, and the scale of the network. The results are used to identify the optimal location management method for a given system environment.
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