Three reliability engineering techniques and their application to evaluating the availability of IT systems: An introduction

Bailey, David; Frank-Schultz, E.; Lindeque, P.; Temple, Jag

doi:10.1147/sj.2008.5386507

Cited by 7 publications

(1 citation statement)

References 13 publications

(8 reference statements)

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“…• Non-state space models (also known as combinatorial models) such as FT, RG, and reliability block diagram (RBD) allows relatively quick quantification of system reliability and availability with the assumption of statistical independence [48]. FT provides a structured approach using a graphical tree representation of basic events causing a system failure.…”

Section: B Reliability and Availability Modeling Techniques In Practicementioning

confidence: 99%

Reliability and Availability Evaluation for Cloud Data Center Networks Using Hierarchical Models

et al. 2019

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Modeling a cloud computing center is crucial to evaluate and predict its inner connectivity reliability and availability. Many previous studies on system availability/reliability assessment of virtualized systems consisting of singular servers in cloud data centers have been reported. In this paper, we propose a hierarchical modeling framework for the reliability and availability evaluation of tree-based data center networks. The hierarchical model consists of three layers, including 1) reliability graphs in the top layer to model the system network topology; 2) a fault-tree to model the architecture of the subsystems; and 3) stochastic reward nets to capture the behaviors and dependency of the components in the subsystems in detail. Two representative data center networks based on three-tier and fat-tree topologies are modeled and analyzed in a comprehensive manner. We specifically consider a number of case-studies to investigate the impact of networking and management on cloud computing centers. Furthermore, we perform various detailed analyses with regard to reliability and availability measures for the system models. The analysis results show that appropriate networking to optimize the distribution of nodes within the data center networks can enhance the reliability/availability. The conclusion of this paper can be used toward the practical management and the construction of cloud computing centers. INDEX TERMS Data center network (DCN), reliability, availability, hierarchical modeling, reliability graph (RG), fault tree (FT), stochastic reward net (SRN).

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Section: B Reliability and Availability Modeling Techniques In Practicementioning

confidence: 99%