Communication Network

The communication infrastructure of the HPC PERUN system is designed to ensure extremely fast, reliable, and low-latency data transfer between computing nodes, storage systems, and user environments.

The network architecture is divided into two interconnected segments — the InfiniBand computing network and the data and management network — which together form the backbone of the entire supercomputing ecosystem.

The core of the computational environment is built on a non-blocking Fat-Tree InfiniBand network architecture, based on NVIDIA InfiniBand NDR 64-port OSFP Quantum-2 400 Gb/s switches.

This topology provides a fully connected structure between all computing nodes without throughput limitations.

The Fat-Tree design minimizes latency and eliminates communication bottlenecks between nodes, enabling efficient scaling of computational performance for parallel workloads.

Thanks to this configuration, the system achieves stable and balanced data flow even under maximum load, which is essential for HPC applications requiring high bandwidth and minimal latency.