Using Byzantine Fault-Tolerance to Improve Dependability in Federated Cloud Computing
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Peter Garraghan,Paul Townend,Jie Xu,Xiaoyu Yang,Peipei Sui. Using Byzantine Fault-Tolerance to Improve Dependability in Federated Cloud Computing. International Journal of Software and Informatics, 2013,7(2):221~237
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Fund:The work is partly supported by the National Basic Research Program of China (973) (No.2011CB302602), the UK EPSRC WRG platform project (No. EP/F057644/1), and the Major Program of the National Natural Science Foundation of China (No. 90818028).
Abstract:Computing Clouds are typically characterized as large scale systems that exhibit dynamic behavior due to variance in workload. However, how exactly these characteristics affect the dependability of Cloud systems remains unclear. Furthermore provisioning reliable service within a Cloud federation, which involves the orchestration of multiple Clouds to provision service, remains an unsolved problem. This is especially true when considering the threat of Byzantine faults. Recently, the feasibility of Byzantine Fault-Tolerance within a single Cloud and federated Cloud environments has been debated. This paper investigates Cloud reliability and the applicability of Byzantine Fault-Tolerance in Cloud computing and introduces a Byzantine fault-tolerance framework that enables the deployment of applications across multiple Cloud administrations. An implementation of this framework has facilitated in-depth experiments producing results comparing the reliability of Cloud applications hosted in a federated Cloud to that of a single Cloud.
keywords:cloud computing  cloud federation  Byzantine fault-tolerance  dependability
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