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Journal of Information Science and Engineering, Vol. 34 No. 1, pp. 205-223

Reaching Optimal Interactive Consistency in a Fallible Cloud Computing Environment

1Department of Information Management
2Department of Industrial Engineering and Management
3Department of Business Administration Chaoyang
University of Technology
Taichung, 413 Taiwan
E-mail: {scwang; sswang; kqyan}@cyut.edu.tw 

    Nowadays, network bandwidth and hardware technology are developing rapidly and resulting in the vigorous development of the Internet. However, cloud computing, an Internet-based development in which dynamically scalable and often virtualized resources are provided as a service over the Internet has become a significant issue. In a cloud- computing environment, the fault-tolerance is an important research topic. To cope with the influence from faulty components, reaching a common consistency at the presence of faults before performing some special tasks is essential. However, the previous protocols for the interactive consistency problem of cloud computing are not enough for a cloud- computing environment with hybrid dual fallible components that nodes and communication media maybe in dormant or malicious fault simultaneously. In this study, the interactive consistency problem with a hybrid dual fallible cloud computing topology is revisited. The new proposed protocol can make all fault-free nodes reach consistency with minimal rounds of message exchanges and tolerate the maximal number of allowable dormant and malicious faulty nodes and communication media in a cloud computing environment.

Keywords: interactive consistency problem, fault tolerance, reliability, cloud computing, distributed computing

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