Job and jobstream modeling in the TRW timeshare system simulation

The method of modeling user jobs and jobstream utilized in the simulation of the TRW Timeshare System (TRW/TSS) is presented. The paper begins with a brief description of the TRW/TSS. Simulation objectives are given. An overview of the simulator is presented. The actual TRW/TSS user jobstream is given in detail. This is followed by two methods of modeling this user profile; namely, a statistical and a job-trace modeling approach which forms the central discussion of this paper. Sections on calibration and validation of these jobstream models and a presentation of results and output to date conclude the article.