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).

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
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.

No network access on compute nodes

According to our security policy, compute nodes shall not have direct access to the public internet. This means that commands like git clone or conda install or pip install, updating Git submodules, fetching data from web sources, etc., will not work on compute nodes.