Workpackage 9 Grid-enabled Scientific Libraries A conceptual model for grid-adaptivity of HPC applications and its logical implementation with components technology

Today grid middleware is complex to be used, the development of grid-aware applications is errorprone and the Virtual Organization grid paradigm contrasts with traditional HPC optimisation strategies based on resource stability and known cost models of inter-node interaction patterns. The authors analyse several aspects of grid adaptivity, and identify 5 roles: the active resource/execution manager, the proactive resource administrator, the reactive quality-service coordinator, the passive resource coordinator . They present a hierarchical model for a component-based grid-software infrastructure in which the resource administrator and the resource coordinator roles are assigned to grid middleware and the quality-service role to HPC skeletons. Component interfaces and interactions are described. The resource administrator mimics functionalities of components containers of service-oriented architectures. The resource coordinator manages the life cycle of sets of processes on top of a pool of grid resources and offers to the upper layers a Virtual Private Grid facade similar to a standard processor cluster facility.