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A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets

It is important to assess availability of virtualized systems in IT business infrastructures. Previous work on availability modeling and analysis of the virtualized systems used a simplified configuration and assumption in which only one virtual machine (VM) runs on a virtual machine monitor (VMM) h...

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Detalles Bibliográficos
Autores principales: Nguyen, Tuan Anh, Kim, Dong Seong, Park, Jong Sou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4138929/
https://www.ncbi.nlm.nih.gov/pubmed/25165732
http://dx.doi.org/10.1155/2014/165316
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author Nguyen, Tuan Anh
Kim, Dong Seong
Park, Jong Sou
author_facet Nguyen, Tuan Anh
Kim, Dong Seong
Park, Jong Sou
author_sort Nguyen, Tuan Anh
collection PubMed
description It is important to assess availability of virtualized systems in IT business infrastructures. Previous work on availability modeling and analysis of the virtualized systems used a simplified configuration and assumption in which only one virtual machine (VM) runs on a virtual machine monitor (VMM) hosted on a physical server. In this paper, we show a comprehensive availability model using stochastic reward nets (SRN). The model takes into account (i) the detailed failures and recovery behaviors of multiple VMs, (ii) various other failure modes and corresponding recovery behaviors (e.g., hardware faults, failure and recovery due to Mandelbugs and aging-related bugs), and (iii) dependency between different subcomponents (e.g., between physical host failure and VMM, etc.) in a virtualized servers system. We also show numerical analysis on steady state availability, downtime in hours per year, transaction loss, and sensitivity analysis. This model provides a new finding on how to increase system availability by combining both software rejuvenations at VM and VMM in a wise manner.
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spelling pubmed-41389292014-08-27 A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets Nguyen, Tuan Anh Kim, Dong Seong Park, Jong Sou ScientificWorldJournal Research Article It is important to assess availability of virtualized systems in IT business infrastructures. Previous work on availability modeling and analysis of the virtualized systems used a simplified configuration and assumption in which only one virtual machine (VM) runs on a virtual machine monitor (VMM) hosted on a physical server. In this paper, we show a comprehensive availability model using stochastic reward nets (SRN). The model takes into account (i) the detailed failures and recovery behaviors of multiple VMs, (ii) various other failure modes and corresponding recovery behaviors (e.g., hardware faults, failure and recovery due to Mandelbugs and aging-related bugs), and (iii) dependency between different subcomponents (e.g., between physical host failure and VMM, etc.) in a virtualized servers system. We also show numerical analysis on steady state availability, downtime in hours per year, transaction loss, and sensitivity analysis. This model provides a new finding on how to increase system availability by combining both software rejuvenations at VM and VMM in a wise manner. Hindawi Publishing Corporation 2014 2014-08-05 /pmc/articles/PMC4138929/ /pubmed/25165732 http://dx.doi.org/10.1155/2014/165316 Text en Copyright © 2014 Tuan Anh Nguyen et al. https://creativecommons.org/licenses/by/3.0/ 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.
spellingShingle Research Article
Nguyen, Tuan Anh
Kim, Dong Seong
Park, Jong Sou
A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title_full A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title_fullStr A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title_full_unstemmed A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title_short A Comprehensive Availability Modeling and Analysis of a Virtualized Servers System Using Stochastic Reward Nets
title_sort comprehensive availability modeling and analysis of a virtualized servers system using stochastic reward nets
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4138929/
https://www.ncbi.nlm.nih.gov/pubmed/25165732
http://dx.doi.org/10.1155/2014/165316
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