DIMUI - IDMS User Manual, Version 1.2.
TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF COMPUTER SCIENCE
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DIMUI is a general purpose model for database performance evaluation. When supplied with certain parameters and augmentation routines, it becomes a model of a specific generalized database management system. In this document we describe how to use the DIMUI IDMS model. We include only the minimum of information necessary to model IDMS databases and processes. DIMUI consists of a set of programs which make up three stages of the main model as well as some utility programs. The first two stages of the model are concerned with translating a users specification of his application data description and a specification of each task which he wishes to model into a very-low-level internal form instruction streams for a virtual data machine VDM one stream for each task. This internal form is still largely machine-configuration-independent. The last stage of the model accepts a description of the configuration and of the job mix i.e. the different instruction streams which are to execute concurrently and produces performance statistics. The model as described here is intended to be used by a data administrator to evaluate the performance of different possible file designs.
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