Model defined fault tolerance in cloud

Fault tolerance (FT) is one of the most important ways to achieve high availability (HA). However, as for cloud, with diverse user requirements, heterogeneous cloud providers, complex FT implementation as well as error-prone configuration, it is a real challenge. To cope with it, we proposed a model defined FT approach which automatically deploys FT mechanisms following a high-level model. With the help of FT model, the existing FT mechanisms will be optimized by reusability. We implemented a prototype of our approach and evaluated it on a popular IaaS cloud - CloudStack.