An Empirical Analysis of the Object-Oriented Database Concurrency Control Mechanism O2C2

An Empirical Analysis of the Object-Oriented Database Concurrency Control Mechanism O2C2

David Olsen, Sudha Ram
Copyright: © 1999 |Pages: 13
DOI: 10.4018/jdm.1999040102
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Abstract

Object-oriented databases are becoming increasingly popular in business. Some areas of research interest include formal object-oriented database models, query optimization, analysis and design techniques, and concurrency control. Many of these issues have been well researched as they pertain to the relational model and to centralized databases. Specifically, many studies have concentrated on relational database concurrency control but few have concentrated on object-oriented database concurrency control. Once a concurrency control mechanism is proposed and implemented, the next phase is to analyze its performance using simulation techniques. This paper includes the simulation study for the object-oriented database concurrency control mechanism named O2C2. Contributions of this study include offering a method of simulating concurrency control in an object-oriented database model. This includes extending prior studies that deal only with reading or writing a single data item without implications to the rest of the database. Specifically, the method of simulating concurrency control in an object-oriented database model is applied to the mechanism O2C2. The simulation demonstrates some intuitive, yet important properties about concurrency control in object-oriented databases. For example, as the mix of transactions progresses from operating mostly with instance objects to operating with more class and method definitions, throughput decreases.

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