Ultrascale Network Protocols for Computing and Science in the 21 st Century ∗

There is a clear and urgent need for ultrascale networking, that provides more than 100 Gbps of throughput end-to-end to transfer Petabyte files, to support the next generation of scientific computing and discoveries. Rapid advances in computing, communication and storage technologies will provide the required raw capacities. The application of these technologies to effective working environments is underway through the revolutionary development of data-intensive Grid systems on a global scale. We must, however, reexamine and redesign the network control protocols that are at the foundation of these transformative trends in science and computer science, to enable us to scale up the networks, and the Grid systems built upon them, by orders of magnitude in the decade ahead. ∗White paper to DoE’s USS (Ultrascale Simulation for Science) initiative.