Dependability evaluation of cloud infrastructures

Cloud computing is a model that resources such as storage, applications and networking infrastructures can be offered as services over the internet. Cloud applications are becoming ever larger and more complex with high availability requirement. This paper presents a modeling strategy based on a hierarchical and heterogeneous modeling for planning of cloud infrastructures. The modeling strategy allows the selection of cloud infrastructures according to dependability and cost requirements. A case study based on virtual learning environments hosted on Eucalyptus platform is adopted to demonstrate the feasibility of the proposed modeling strategy.