Quantifying Resiliency of Virtualized System with Software Rejuvenation

Hiroyuki OKAMURA; Jungang GUAN; Chao LUO; Tadashi DOHI

doi:10.1587/transfun.E98.A.2051

Special Section on Recent Developments on Reliability, Maintainability and Dependability

Quantifying Resiliency of Virtualized System with Software Rejuvenation

Hiroyuki OKAMURA, Jungang GUAN, Chao LUO, Tadashi DOHI

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Keywords: virtualized system, software rejuvenation, system resiliency, continuous-time Markov chain, PH approximation

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2015 Volume E98.A Issue 10 Pages 2051-2059

DOI https://doi.org/10.1587/transfun.E98.A.2051

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Abstract

This paper considers how to evaluate the resiliency for virtualized system with software rejuvenation. The software rejuvenation is a proactive technique to prevent the failure caused by aging phenomenon such as resource exhaustion. In particular, according to Gohsh et al. (2010), we compute a quantitative criterion to evaluate resiliency of system by using continuous-time Markov chains (CTMC). In addition, in order to convert general state-based models to CTMCs, we employ PH (phase-type) expansion technique. In numerical examples, we investigate the resiliency of virtualized system with software rejuvenation under two different rejuvenation policies.

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