Logical infrastructure composition layer, the GEYSERS holistic approach for infrastructure virtualisation

This article presents the Logical Infrastructure Composition Layer as a solution produced in the context of the European project GEYSERS for ICT infrastructure virtualisation in the Future Internet. The concepts behind this layer are based on infrastructure resources virtualisation, regardless of their nature (either IT or network); the Resources-Ownership-Roles-Actors model for virtualised resources access and the concept of the Virtual Infrastructure and its management attributes. This article provides an overview on them. After that, the work is focused on the Virtual-to-Physical Infrastructure mapping problem and different options to allocate Virtual Infrastructures over the same substrate. Finally we present the grouped VI mapping strategy and its analysis, depending on the utility function considered and the context conditions. Our findings show that batched VI mapping strategy enhances the amount of VIs to be allocated on the physical substrate. The technological solution and simulations on the potential benefits show a novel ICT infrastructure control and management solution that is able to accommodate the optimisation requirements for the Future Internet (cost, energy, availability, flexibility, etc.) in coordination with application deployments and cloud service models.