About the HPC system Raven

About the HPC system Raven

Supercomputer Raven was installed in September 2020 and is getting upgraded in two phases during the first half of 2021. The initial configuration served as an interim system and comprised 516 compute nodes based on the Intel Xeon CascadeLake-AP processor (Xeon Platinum 9242), providing 49,536 CPU-cores, 193 TB RAM, and 3.5 PFlop/s theoretical peak (FP64) in total. 

In April and June 2021 the interim system gets replaced in two steps by the final system. The new machine finally comprises more than 1400 compute nodes with the new Intel Xeon IceLake-SP processor (Platinum 8360Y with 72 cores per node and 256 GB RAM). A subset of 64 nodes is equipped with 512 GB RAM and 4 nodes with 2048 GB RAM. In addition, Raven will provide 192 GPU-accelerated compute nodes, each with 4 Nvidia A100 GPUs (4 x 40 GB HBM2 memory per node and Nvlink). The  nodes are interconnected with a Mellanox HDR InfiniBand network (100 Gbit/s) using a pruned fat-tree topology with three non-blocking islands (720 CPU nodes with 256 GB RAM, 660 CPU nodes with 256 GB RAM, 192 GPU nodes plus 64 CPU nodes with 512 GB RAM and 4 CPU nodes with 2 TB RAM). The GPU nodes are interconnected with up to 200 Gbit/s.

In addition there are 4 nodes for login and interactive tests, and an I/O subsystem that serves ca. 7 Peta Bytes of disk storage with direct HSM access (via GHI).

Overall compute-node configuration (as of May 10, 2021):

  • 720 CPU compute nodes (Intel Xeon IceLake-SP 8360Y with 72 cores per node and 256 GB RAM per node)
  • 64 CPU compute nodes (Intel Xeon IceLake-SP 8360Y with 72 cores per node and 512 GB RAM per node)
  • 4 CPU compute nodes (Intel Xeon IceLake-SP 8360Y with 72 cores per node and 2048 GB RAM per node)

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