doi: 10.4304/jsw.9.1.129-139
Availability Modeling and Analysis of a Single-Server Virtualized System with Rejuvenation
- Institute 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.
Keywords
- Analytic model
- virtualization
- availabi
How to 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. https://doi.org/ 10.4304/jsw.9.1.129-139
Copyright & License
Copyright © 2014 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).