| Summary: | This paper details the state of the art, the design, development and deployment of the EGI Federated Cloud platform, an e-infrastructure offering scalable and flexible models of utilization to the European research community. While continuing support for the traditional High Throughput Computing model, the EGI Cloud Platform extends its reach to other models of utilization such as long-lived services and on demand computation. Following a two-year period of development, the EGI Federated Cloud platform was officially launched in May 2014 offering resources provided by trusted academic and research organisations from within the user communities and consistently with their standard funding regime. Since then, the use cases supported have significantly increased both in total number and diversity of model of service required, validating both the choice of enforcing cloud technology agnosticism and of supporting service mobility and portability by means of open standards. These design choices have also allowed for the inclusion of commercial cloud providers into an infrastructure previously supported only by academic institutions. This contributes to a wider goal of funding agencies to create economic and social impact from supported research activities.
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