Volume 9 Number 1 (Jan. 2014)
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JSW 2014 Vol.9(1): 129-139 ISSN: 1796-217X
doi: 10.4304/jsw.9.1.129-139

Availability Modeling and Analysis of a Single-Server Virtualized System with Rejuvenation

Jian Xu, Xuefeng Li, Yi Zhong and Hong Zhang
1Institute of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing, 210094, China

Abstract—Availability of business-critical application servers is an issue of paramount importance that has received special attention from the industry and academia in the last decade. This paper presents two stochastic reward net based availability models for a single-server virtualized system. The similarity in both models is that software rejuvenation is applied at not only virtual machine monitor (VMM) level using a time-base policy but also at virtual machines (VMs) using a prediction-based policy. The key difference is that the passive software replication and the active software replication are respectively adopted at the VM level of both models. We compare these models in terms of steady-state system availability by numerical analysis. Results show steady-state system availability with the active replication style gets a bit better than that of the passive one. Further, we study the impact of two critical parameters, the VMM rejuvenation interval and the VM aging detection probability, on downtime and on the number of transaction lost by sensitivity analysis.

Index Terms—Analytic model, virtualization, availability, stochastic reward net, software rejuvenation

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Cite: Jian Xu, Xuefeng Li, Yi Zhong and Hong Zhang, "Availability Modeling and Analysis of a Single-Server Virtualized System with Rejuvenation," Journal of Software vol. 9, no. 1, pp. 129-139, 2014.

General Information

ISSN: 1796-217X (Online)
Frequency:  Bimonthly 
Editor-in-Chief: Prof. Antanas Verikas
Executive Editor: Ms. Yoyo Y. Zhou
Abstracting/ Indexing: DBLP, EBSCO, CNKIGoogle Scholar, ProQuest, INSPEC(IET), ULRICH's Periodicals Directory, WorldCat, etc
E-mail: jsw@iap.org
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