An Empirical Study of Persistent Object Stores

Persistent object stores support the creation, manipulation, storage, and retrieval of objects. Other desirable features of persistent stores are protection, transaction management, version control and concurrency control. Due to a lack of complete understanding of the demands of applications, there is a great deal of variation in the functionality of POSs. This work is an effort to determine how these differing models fit with an existing CAGD system Alpha_1 (a spline based geometric modeller written at the University of Utah). We compare Alpha_1's existing persistent object base with ESM (from University of California, Berkeley). The various features that are considered include performance, distribution, data clustering, object identifier support, concurrency and navigational support.