A distributed object-oriented database system supporting shared and private databases

  • Authors:

  • Won Kim;Nat Ballou;Jorge F. Garza;Darrell Woelk

  • Affiliations:

  • Microelectronics and Computer Technology Corp., Austin, TX;Microelectronics and Computer Technology Corp., Austin, TX;Microelectronics and Computer Technology Corp., Austin, TX;Microelectronics and Computer Technology Corp., Austin, TX

  • Venue:
  • ACM Transactions on Information Systems (TOIS)
  • Year:
  • 1991

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Abstract

ORION-2 is a commercially available, federated, object-oriented database management system designed and implemented at MCC. One major architectural innovation in ORION-2 is the coexistence of a shared databese and a number of private databases. The shared database is accessible to all authorized users of the system, while each private database is accessible to only the user who owns it. A distributed database system with a shared database and private databases for individual users is a natural architecture for data-intensive application environments on a network of workstations, notably computer-aided design and engineering systems. This paper discusses the benefits and limitations of such a system and explores the impact of such an architecture on the semantics and implementation of some of the key functions of a database system, notably queries, database schema, and versions. Although the issues are discussed in the context of an object-oriented data model, the results (at least significant portions thereof) are applicable to database systems supporting other data models.