RELIABILITY ANALYSIS OF A SOFTWARE REDUNDANCY SYSTEM

by Anant P. Godbole, Nicholas W. Locantore, Jr., and Gomathi Sadhasivan.

Abstract:The Stein-Chen method of Poisson approximation is used to estimate the reliability of a software system consisting of l independent backups of a portfolio of n files; we would like each file to have at least one readable copy, given information about the numbers of erased files within each backup "column". Exact formulas for the system reliability are also obtained.

Key Words: Backup Systems, Coupling, Poisson Approximation, Redundancy, Stein-Chen Method, System Reliability.

Authors:
Anant P. Godbole, anant@mtu.edu
Nicholas W. Locantore, Jr., locantor%mickey@stat.unc.edu
Gomathi Sadhasivan, karlin23@delphi.com

Editor: S. K. Katti, STATSKK@MIZZOU1.missouri.edu

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