There were few changes compared with the lis from November 2022: The top ten rankings remained unchanged. The "Frontier" system at Oak Ridge National Laboratory was expanded and leads the list unchallenged with a peak computing performance of 1,686 ExaFlop/s. The fastest European system remains LUMI on rank 3 with a total performance of 309.1 PetaFlop/s at CSC - IT Center for Science in Finland.

The number of German systems on the list has increased from 31 to 36. The three large centers of the Gauss Centre for Supercomputers dominate the German contribution to the list. Juwels Booster of Forschungszentrum Jülich is the most powerful German supercomputer with 44.1 PetaFlop/s. The DKRZ computer Levante ranks as the fourth most powerful German system.

The overall performance of the Top500 list increased by only 7.7% to 5.2 ExaFlop/s, which is the second lowest increase since 1993. The average age of the listed systems increased to now 33 months, while it was consistently in the 5-10 month range until 2010. At the top, computing power is concentrated, with the nine most powerful systems collectively having as much power as the remaining 491, a figure that was around 50 systems until 2010. By the end of the decade, a maximum tenfold increase in the performance of the top systems is expected.

Further information on TOP500: www.top500.org/lists/top500/2022/06/

Impressions: DKRZ@ISC‘23

During the conference program of ISC'23, more than 3100 participants met to inform and exchange information about new developments in the fields of system architecture, parallel programming, applications and algorithms as well as machine learning and quantum computing under the motto #Imaging tomorrow.

In the parallel exhibition, more than 150 companies and institutions presented their work and products,among them DKRZ. Highlight of the DKRZ booth J908 was the latest storm-resolving climate visualizations on the climate globe and an interactive touch table. The Levante supercomputer is currently the only supercomputer in Europe capable of computing the fully coupled ICON global Earth system model with a horizontal resolution of 1.2 km in atmosphere and ocean.

During ISC'23, two guided tours to Levante were offered to interested visitors.

The DKRZ team was represented in the conference program by contributions at the DDN user group (Talk by Carsten Beyer, DKRZ: Large, Fast Filesystems & the Challenges of Managing Peta-Scale Climate Data) and in the poster session.