Network Interconnect for Exascale Systems

Network: the next big bottleneck?

Network interconnect is the backbone of a supercomputer, connecting together the compute nodes

To reach the exascale with a reasonable power consumption, exascale supercomputers will include a huge number of nodes, and they will be hybrid nodes integrating GPUs and CPUs

Integrating heterogeneous nodes requires a smarter interconnect, with additional features to accelerate connectivity between servers and storage

Those are the challenges that RED-SEA is tackling to design the network interconnect that will power future European Exascale systems

The RED-SEA blog

By the RED-SEA experts

Latest blog

  • Extending LinkTest for BXI interconnects
    Authors: Yannik Müller, Ilya Zhukov and Vitor Silva (Jülich Supercomputing Centre, Forschungszentrum Jülich, Jülich, Germany) I. Introduction Efficient communication among processes is vital in the High-Performance Computing (HPC) world. To gain insights into the current network’s state and identify potential bottlenecks, a reliable network benchmarking tool is required. This is where LinkTest comes in – a robust communications benchmarking tool designed to test point-to-point connections between processes in serial or parallel mode, and capable of handling very large numbers of processes (tested up to 1 800 000 MPI tasks). It can communicate via MPI[1] or lower-level protocols such as UCP[2], … Read more


  • Founding of Ultra Ethernet Consortium
    The founding of the Ultra Ethernet Consortium (UEC) was announced on 19 July 2023, and RED-SEA coordinator Eviden (an Atos business) is one of the founding members – the only … Read more
  • The SEA projects at ISC23
    At ISC 2023 in Hamburg, from 22 to 24 May, the SEA projects were exhibiting together on the EuroHPC JU booth. If you missed us there, here is a taste … Read more


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Our partners the other SEA projects

The EuroHPC projects DEEP-SEA, IO-SEA and RED-SEA have joined forces to develop complementary European technologies for future heterogeneous exascale supercomputing architectures.

An introduction to the Modular Supercomputing Architecture leveraged by the SEA projects: