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A Mellanox Infiniband EDR (100 Gb/s) network connects together all the nodes of the cluster. A central switch of 324 ports links the cluster's island topology with a maximum blocking factor of 5:1. The storage servers are networked with a non-blocking connection. The architecture permits multiple parallel jobs with up to 640 cores (or more) thanks to a non-blocking network. For jobs requiring greater parallelism, the blocking factor is 5:1 but even for jobs executed across several islands, the interconnection is high-performance. | A Mellanox Infiniband EDR (100 Gb/s) network connects together all the nodes of the cluster. A central switch of 324 ports links the cluster's island topology with a maximum blocking factor of 5:1. The storage servers are networked with a non-blocking connection. The architecture permits multiple parallel jobs with up to 640 cores (or more) thanks to a non-blocking network. For jobs requiring greater parallelism, the blocking factor is 5:1 but even for jobs executed across several islands, the interconnection is high-performance. | ||
==Node characteristics== | |||
=Node characteristics= | |||
Turbo mode is activated on all compute nodes of Béluga. | Turbo mode is activated on all compute nodes of Béluga. | ||
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| 172 || 40 || 186G or 191000M ||2 x Intel Gold 6148 Skylake @ 2.4 GHz || 1 x NVMe SSD 1.6T || 4 x NVidia V100SXM2 (16G memory), connected via NVLink | | 172 || 40 || 186G or 191000M ||2 x Intel Gold 6148 Skylake @ 2.4 GHz || 1 x NVMe SSD 1.6T || 4 x NVidia V100SXM2 (16G memory), connected via NVLink | ||
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* To get a larger <code>$SLURM_TMPDIR</code> space, a job can be submitted with <code>--tmp=xG</code>, where <code>x</code> is a value between 350 and 2490. | * To get a larger <code>$SLURM_TMPDIR</code> space, a job can be submitted with <code>--tmp=xG</code>, where <code>x</code> is a value between 350 and 2490. | ||