Consuming Resources and Services from Multiple Clouds

The consumption of resources and services from multiple Clouds for reasons like high availability, cost reductions or special features is a natural evolution from in-silo Clouds. Several middleware are already available for multiple Clouds. However, due to the complexity of the technical solutions, their approaches are quite different and a classification is needed to guide the potential users. This paper looks to the reports on multiple Cloud topics and proposes a specific taxonomy. It identifies the ready-to-use software and services and classifies them according the taxonomy. It also underlines the driving needs and requirements from consumers’ and providers’ point of views. A particular Cloudware is provided as an example for the degree of requirements fulfillment.