Probabilistic modeling of computer system availability


Journal Article

System availability is becoming an increasingly important factor in evaluating the behavior of commercial computer systems. This is due to the increased dependence of enterprises on continuously operating computer systems and to the emphasis on fault-tolerant designs. Thus, we expect availability modeling to be of increasing interest to computer system analysts and for performance models and availability models to be used to evaluate combined performance/availability (performability) measures. Since commercial computer systems are repairable, availability measures are of greater interest than reliability measures. Reliability measures are typically used to evaluate nonrepairable systems such as occur in military and aerospace applications. We will discuss system aspects which should be represented in an availability model; however, our main focus is a state of the art summary of analytical and numerical methods used to solve computer system availability models. We will consider both transient and steady-state availability measures and for transient measures, both expected values and distributions. We are developing a program package for system availability modeling and intend to incorporate the best solution methods. © 1987 J.C. Baltzer A.G., Scientific Publishing Company.

Full Text

Duke Authors

Cited Authors

  • Goyal, A; Lavenberg, SS; Trivedi, KS

Published Date

  • December 1, 1987

Published In

Volume / Issue

  • 8 / 1

Start / End Page

  • 285 - 306

Electronic International Standard Serial Number (EISSN)

  • 1572-9338

International Standard Serial Number (ISSN)

  • 0254-5330

Digital Object Identifier (DOI)

  • 10.1007/BF02187098

Citation Source

  • Scopus