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Architecture: IBM Power 9 AC922
Internal Network:  Mellanox Infiniband EDR DragonFly+ 100 Gb/s
Storage: 8 PB (raw) GPFS of local storage

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Model: IBM Power AC922 (Whiterspoon)

Racks: 55 total (49 compute)
Nodes: 980
Processors: 2x16 cores IBM POWER9 AC922 at 2.6(3.1) GHz
Accelerators: 4 x NVIDIA Volta V100 GPUs/node, Nvlink 2.0, 16GB
Cores: 32 cores/node, Hyperthreading x4
RAM: 256 GB/node (242 usable)
Peak Performance: about 32 Pflop/s, 32 TFlops per node
Internal Network: Mellanox IB EDR DragonFly++ 100Gb/s
Disk Space: 8PB raw GPFS storage

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 The internode communications is based on a Mellanox Infiniband EDR network 100 Gb/s, and the OpenMPI and IBM MPI Spectrum libraries are configured so to exploit the Mellanox Fabric Collective Accelerators (also on CUDA memories) and Messaging Accelerators.

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