Abstract
A method is described to model the reconnect blocking probability in I/O subsystems. The model handles systems with multiple blocking points, multipathing, and dynamic reconnect. A few restrictions are imposed on the I/O configurations to be modelled, but they do not conflict with real life systems. The restrictions enable us to compute all controller and path utilizations without the need for iteration. A consistent set of conditional controller busy probabilities and a generalized multipathing operator are introduced to compute blocking probabilities. The model proposed pairs accuracy with an intuitively appealing approach. Extensive validation results are presented for the model, showing its accuracy.
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© 1989 Plenum Press, New York
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Houtekamer, G.E. (1989). Modelling DASD Configurations with Multipathing and Multiple Blocking Points. In: Puigjaner, R., Potier, D. (eds) Modeling Techniques and Tools for Computer Performance Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0533-0_15
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DOI: https://doi.org/10.1007/978-1-4613-0533-0_15
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-7853-5
Online ISBN: 978-1-4613-0533-0
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