Stochastic Analysis of a Computer System with Unit Wise Cold Standby Redundancy and Failure of Service Facility

Abstract

Here, we analyze stochastically a computer system by taking one more similar unit (called computer system) in cold standby redundancy. The computer system consists of hardware and software components together. The provision of a single service facility has been made for repairing hardware and up-grading the software. The failure of the service facility is considered which resumes the jobs with full efficiency as new after availing treatment. The failure rates of hardware and software components as well as failure rate of the service facility are taken as constant and thus follow negative exponential distribution. The treatment rate of the service facility, repair rate of the hardware and up-gradation rate of the software follow arbitrary distributions with different probability density functions. Efforts have been made to determine reliability measures in steady state by using SMP and RPT. The behavior of MTSF, availability and also the profit function is observed graphically for some particular situations of the parameters.

A Stochastic Analysis of Computing Models in Computer System Reliability Based on Hardware and Software

“…Semantic set firing probabilities are significant exclusively to collective agents. In a similar way, trustworthiness R (2) and R (3) of pathwaysQ2 and Q3can be found. Next, the system's dependability is provided by R(T) = R1C1R2C2R3C3(q1R (1) + q2R (2) )…”

“…One may compute the dependability the bridge network is identifiable in the the data flow graph as R(Bridge Network) = R (3) + R (1) [(1-RD)+RD(1-RC)]+R (2) (1-RA)RD(1-RD)+R (4) Where path Qj dependability is denoted by R (1) . Units A, B, C, D, and F have reliabilities denoted as RB, RA, RD, RC, and RF, in that order.…”