Three Directors General, Vice-Chancellor Helen Dannetun and Matts Karlsson, director of NSC, cut the broad blue/yellow ribbon while silver tape rained down from above. The oldest and largest supercomputer centre in Sweden celebrated 30 years of operation, and the inauguration of the new systems will bring an increase in collaboration between NSC and weather forecasting services in the Nordic region. Both SMHI and MET Norway have invested in supercomputers that have been purchased and installed at NSC.
The other systems inaugurated are Sigma, financed by Linköping University for its academic research, Stratus and Cirrus, two supercomputers for Nordic weather forecasting financed by SMHI and MET Norway, and Nebula, financed by MET Norway for research and development. In total, 2,896 computational servers with 92,288 processor cores and a peak processing speed of 6.2 petaflops (1015 floating point operations per second) are now online.
The hardware is distributed between three separate units running the NSC software. This comprises a lowermost layer that ensures that all the servers function as a cluster, binding them together, and a layer placed above this where the scientific calculations are carried out.
“We have worked hard with the construction during the autumn, and in addition to the software we have had to put in a lot of blood, sweat and tears to make sure that everything functioned without impacting the users”, joked Niclas Andersson, technical manager at NSC.
A Swedish resource
The largest unit, Tetralith, is currently the most powerful supercomputer in the Nordic region, with a maximum processing speed of around 4 petaflops. Tetralith has been financed through SNIC, the Swedish National Infrastructure for Computing, which in turn receives its financing from the Swedish Research Council and from the ten Swedish universities that are members of the collaboration.
Tetralith is a national resource for Sweden, open for researchers at Swedish institutions of higher education. Those wishing to use Tetralith must apply for computer time to the SNIC allocation committee, SNAC. The chair of SNAC is KTH researcher Philipp Schlatter.
“We are happy to be able to allocate time on Tetralith, and are expecting major new research results”, he said, and described as an example how his own research in the fluid mechanics around aeroplanes and aeroplane wings has been refined and improved, thanks to the continuously increasing computer power available.
Other examples of research fields that obtain access to significantly greater computing power with the inauguration of Tetralith are the development of new tailored materials, new aircraft models, visualisation and machine learning, simulation of the flow of blood through the heart and blood vessels, and many more.
Decisive collaboration
In addition to financing from SNIC, NSC has a number of collaborations. One of these is a long-standing arrangement with the Saab Group, which was one of the reasons why the NSC, as the first Swedish supercomputer centre, ended up in Linköping. Another important collaboration is that with SMHI, providing resources for weather and climate research. It is precisely the broad expertise and the stable systems at NSC that have led to the collaboration with SMHI and MET Norway now being deepened.
General director of SMHI, Rolf Brennerfelt, also emphasised how important the collaboration is.
“In recent years, SMHI and the Norwegian Meteorological Institute have developed a unique collaboration in forecasting services. Now we are also investing in common supercomputer facilities. The Finnish Meteorological Institute, FMI, has been included in the collaboration in forecasting since 2017, and we are hoping that a further seven countries in northern Europe will join in the long term”, he said.
More frequent weather forecasts and the ability to explore different scenarios of how climate change will affect different parts of northern Europe are two direct results from the collaboration.
