The Implementation of Temporal Database Management Testbed

在表示单个时间点的企业状态方面，传统的数据库管理系统(DBMS)不提供对存储或访问时变数据的支持。在这个项目中，提供这种支持的时态数据库管理系统的实现涉及到的问题进行了研究。采用的方法是对三级存储的体系结构进行改进：一个包含当前数据，一个包含有关过去(和未来)的数据，以及一个包含已更正的数据。要研究这些改进对时态DBMS的所有组件的影响，尤其要密切关注存储结构、并发控制以及主内存高速缓存管理器和异步归档管理器之间的交互。当需要实施经验和经验数据时，在可能的情况下使用模拟，模型建立在可扩展的DBMS上。其目标是开发一种技术，使其能够在不影响传统查询性能的情况下，有效地执行涉及时间的操作。这项研究将提供时态数据库系统的理论基础和理解，以及在数据库社区以外的领域的实际应用，例如软件工程，因为所开发的概念可能形成编程环境的基础，有助于管理版本或并发控制。

Conventional database management systems (DBMS's), in representing the state of an enterprise at a single point in time, do not provide support for storing or accessing time-varying data. In this project, the issues involved in the implementation of temporal DBMS's that provide such support are investigated. The adopted approach is the architectural refinement of a three-level store: one containing current data, one containing data concerning the past (and future), and one containing data that has been corrected. The impact of these refinements on all components of a temporal DBMS are to be studied, paying especially close attention to storage structures, concurrency control, and interaction between the main memory cache manager and the asynchronous archive manager. Simulation is used where possible, with a model built on an extensible DBMS when implementation experience and empirical data are desired. The goal is to develop techniques that will add to conventional DBMS's the ability to efficiently perform operations involving time while not impacting the performance of conventional queries. This research will provide theoretical basis and understanding of temporal database system, as well as practical applications in areas beyond database community, e.g. software engineering as concepts developed may form the basis for programming environment, helping to manage versions or concurrency control.