Betzy

Named after Mary Ann Elizabeth (Betzy) Stephansen, the first Norwegian woman to be awarded a doctorate degree.

The most powerful supercomputer in Norway

Betzy is a BullSequana XH2000, provided by Atos, and will give Norwegian researchers almost three times more capacity than previously, with a theoretical peak performance of 6.2 PetaFlops. The supercomputer is located at NTNU in Trondheim, and was set in production 24 November 2020. Betzy provides close to two billion CPU hours per year, and has a contracted operating time of four years (2024), with an optional one-year extension (2025).

Betzy has also gotten a GPU partition consisting of 4 nodes. Each node has 128 CPU cores, 512 GiB memory and 4 x Nvidia A100 GPUs with 40GB memory connected by NVLink.

Details

Betzy

System

BullSequana XH2000

Max Floating point performance, double

6.2 Petaflops

Number of compute nodes

1344

CPU type

AMD® Epyc™ 7742 2.25GHz

CPU cores in total

172032

CPU cores per node

128

Memory in total

336 TiB

Memory per node

256 GiB

GPU type

Nvidia A100 40 GB with NVLink

GPUs per node

4

GPUs in total

16

Operating System

Red Hat Enterprise Linux 7

Total disc capacity

2.5 PB

Interconnect

InfiniBand HDR 100, Dragonfly+ topology

Top500 June 2020

55th place @ 1250 nodes, 76% efficiency

Almost all components are liquid cooled resulting in a very high cooling efficiency, 95% of heat being captured to water.