An Evaluation of Alternative Object Reassembly Strategies

The performance of object reassembly, notably the most expensice operation and therefore mainly determining the overall performance, is clearly crucial for the success of object-oriented databases. In this paper, we examine alternative processing strategies for object reassembly on a nested relational storage manager (DASDBS) and a flat record storage system (Oracle), as two possible storage susystems for object database systems. As an example ODMBS we will use COCOON throughout this paper. We show how to exploit the complex record features of DASDBS, which allo innovative processing techniques tat can result in performances, improvements of up to an order of magnitude. In particular, DASDBS as a research vehicle can even outperform industrial strength, well-tuned strategies performed by Oracle