A comparative cost analysis of fault-tolerance mechanisms for availability on the cloud

In this paper, two state-of-the-art fault-tolerance techniques are compared in terms of availability of computing environments to cloud consumers and energy costs to cloud providers. The results show that proactive fault-tolerance techniques outperform traditional redundancies in terms of costs to cloud users while providing available computing environments and services to consumers. However, the computing environment dependability provided by proactive fault-tolerance highly depends on failure prediction accuracy.