Citation
Abstract
Existing availability models of standby redundant systems consider only an operator’s performance and its interaction with the hardware performance. In the case of operational data systems in the DSN, in addition to an operator-system interface, a controller reconfigures the system and links a standby unit into the network datapath upon failure of the operating unit. In this article, a stochastic (Markovian) process technique is employed to model and analyze the availability performance of this class of communication systems. The link-controller’s performance and occurrence of degradation due to partial failures are quantitatively incorporated into the model. Exact expressions of the steady-state availability and proportion-degraded performance measures are derived for the systems under study. The interaction among the hardware, operator, and controller performance parameters and that interaction’s effect on data availability are evaluated and illustrated for an operational data-processing system.
Details
- Volume
- 42-106
- Published
- August 15, 1991
- Pages
- 394–403
- File Size
- 467.7 KB