The HPC@PoliTO Infrastructure

The HPC@PoliTO infrastructure is currently made of one HPC cluster: LEGION. It was first deployed in 2020 and underwent a major upgrade in 2024. It is used by research groups at Politecnico di Torino for their heavier workloads.

The High Performance Computing infrastructure is supported by two complementary storage systems: a high-capacity Network Attached Storage (NAS) to store users' homes and data and a lower-capacity BeeGFS parallel filesystem that provide a scratch space for IO intensive workloads that require parallel high-speed operations

LEGION is our flaghsip cluster, based on a high-bandwidth and low-latency RDMA network (Infiniband) it currently consists of 132 computing nodes, 34 of which are equipped with NVIDIA GPUs. The cluster currently aggregates 5420 CPU cores (Intel Xeon Gold), 60.4 TB of RAM, 108 NVIDIA A40, 4 NVIDIA A100 and 24 NVIDIA V100. The Legion HPC cluster is made of two zones with uniform hardware and performance characteristics: "Isola 1" and "Isola 2".

Isola 1 collects early-deployed compute nodes (from 2019-2020). Isola 1 contains 52 CPU compute nodes and 6 GPU nodes with the following characteristics:

  • CPU: 2 x Intel Xeon 6130 (32 cores)
  • RAM: 384 GB DDR4.
  • GPU (GPU nodes only): 4 x NVIDIA V100 SXM 32 GB

Isola 2 was deployed between late 2024 and early 2025. It contains 46 CPU compute nodes, 26 GPU nodes with NVIDIA A40s and 1 GPU node with NVIDIA A100s. Nodes in Isola2 have the following characteristics:

  • CPU: 2 x Intel Xeon 6442Y (48 cores)
  • RAM: 512 GB DDR5.
  • GPU (GPU nodes only): 4 x NVIDIA A40 48 GB / 4 x NVIDIA A100 80 GB

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Isola 1 and Isola 2 are logically separated and jobs cannot be run across the two to avoid bottlenecks. Nonetheless Legion is considered a single cluster, sharing login, management, network and storage infrastructures.

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