An Overview of the Preliminary Design of SDD-1: A System for Distributed Databases.
COMPUTER CORP OF AMERICA CAMBRIDGE MA
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SDD-1, A System for Distributed Databases, is currently being designed and implemented by Computer Corporation of America. SDD-1 is composed of a collection of datamodules which may be dispersed geographically and which are assumed to communicate over channels which may vary in bandwidth and delay. Also, the system supports redundant databases, meaning that portions of databases may be stored at two or more datamodules in order to improve the reliability and efficiency of database operations. This paper presents a brief overview of several key facets of SDD-1. These include the system architecture, the data distribution concepts used by the system, SDD-1s approach to directory management, the method employed for efficiently handling updates to redundantly stored data, and SDD-1s method for efficiently retrieving data which is dispersed at distant datamodules.
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