Online Work Distribution to Clouds

International audience; Cloud systems include both locally based servers at user premises and remote servers and multiple Clouds that can be reached over the Internet. This paper describes a smart distributed system that combines local and remote Cloud facilities. It operates with a task allocation system that takes decisions to allocate tasks dynamically to the service that offers the best overall Quality of Service and a routing overlay which optimizes network delay for data transfer between clouds. Experimental results are conducted at the global intercontinental level, both to collect data for decision making and to illustrate the effectiveness of our approach.