Modeling a cloud computing center is crucial to evaluate and predict its inner connectivity Tanning Product 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 #syd-hill-oilskin-vest 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.