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Visiting the German Climate Computing Centre (DKRZ) in Hamburg

Yesterday, I had an opportunity to visit the German Climate Computing Centre (Deutsches Klimarechenzentrum – DKRZ) here in Hamburg to learn more about their research and tour their data center.

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They recently installed a new supercomputer named HLRE-4 Levante, and it was very impressive. What surprised me most was how quiet a data center can be inside when it’s water-cooled.

Some specs of this system include:

  • 2,832 compute nodes
  • Peak performance: 14 PetaFLOPS
  • Main memory (total): 815 Terabyte
  • 60 GPU nodes each equipped with 2 AMD 7713 CPUs (main memory 512 Gigabyte) and 4 Nvidia A100 GPUs
  • Peak performance: : 2.8 PetaFLOPS
  • Main memory: approx. 30 Terabyte
  • Graphics memory: approx. 5 Terabyte
  • Networking: NVIDIA Mellanox InfiniBand HDR 100G/200G
  • Disk storage: 130 Petabyte (Lustre) by DDN
  • Long-term storage is performed via an array of 8 Oracle/StorageTek SL8500 tape libraries (over 300 Petabytes total capacity)

I took some pictures that you can find here – enjoy!