A Straightforward Model for Computer Performance Prediction
ACM Computing Surveys (CSUR)
Computational algorithms for closed queueing networks with exponential servers
Communications of the ACM
Probability, Statistics, and Queueing Theory with Computer Science Applications
Probability, Statistics, and Queueing Theory with Computer Science Applications
A programming language
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The performance of MVS (Multiple Virtual Storage) systems can be predicted for changes in workload and environment by an IBM marketing aid informally called SCAPE (for System Capacity and Performance Evaluation). Written in FORTRAN, the programs use simple queuing formulas with empirical modifications. Response times for complex workload(IMS, CICS, TSO, and batch) through the CPU and auxiliary storage are expressed as functions of application loads and other parameters that define the system's environment. SCAPE can predict the effect on performance of different CPU models, larger memory, additional channels, additional direct-access storage, larger block sizes, and alternate workload projections.