The European High-Performance Computing Joint Undertaking (EuroHPC JU) is pooling European resources to develop top-of-the-range exascale supercomputers for processing big data, based on competitive European technology.

At the time of installation, LUMI will be one of the world’s fastest computer systems, having theoretical computing power of more than 500 petaflops which means 500 quintillion calculations per second. LUMI’s performance will be more than tenfold compared to one of Europe’s fastest supercomputer today (Piz Daint, Switzerland). LUMI will also be one of the world’s leading platforms for artificial intelligence.


LUMI will be installed in Kajaani, Finland. Basic operations are done by the vendor and CSC. Researchers will be supported by different teams: the Norwegian EuroHPC competence centre for porting and tuning applications on the LUMI hardware and programming environment, Sigma2 for handling allocation requests, and The LUMI User Support Team (LUST) for day-to-day issues.


LUMI is the first of a new class of pre-exascale supercomputers set up by a consortium of countries in Europe. All partner countries will get access to an equal share of the resources, currently estimated to be 2% for Norway. In addition, project can apply for resources through EuroHPC JU which control the other 50% of LUMI capacity.

LUMI is aimed at AI and HPC workloads that can take advantage of GPU accelerators.

LUMI is divided into the following partitions, where the largest will be LUMI-G followed by LUMI-C: LUMI partitionoverview



Peak performance

552 PetaFLOPs

CPU type

Next generation AMD® Epyc™ 64-Core

GPU type

Next generation AMD® Instinct™ GPU

Storage capacity

  • 117 PB total
    • 7 PB fast flash storage
    • 80 PB parallel filesystem
    • 30 PB object storage

Expected Top500

Top 3


LUMI-G is the main partition of LUMI and is based on AMD accelerators. The main interactions with the accelerators is through ROCm, OpenMP and HIP. CUDA is not supported on LUMI and existing users should consider porting their application to HIP through the tools offered. Starting early with the porting effort is very important and will be supported by the EuroHPC CC team.

The Metacenter is currently soliciting pilot users for LUMI-G participation. Interested users should contact Since there is a limited number of pilots, users will need to dedicate some amount of time to get ready for pilot testing, however, the Metacenter will be available for help in porting applications to LUMI-G.

Once LUMI-G is operational and pilot testing is completed, all interested users will be able to request access. Applications that can take advantage of GPU accelerators will see massive speed-ups on LUMI-G and the Metacenter will continue to aid in porting applications to this architecture.

Porting to accelerators

Since LUMI-G is based on AMD GPU Accelerators, not all applications will be able to instantly take advantage of the additional compute power. AI researchers using one of the larger frameworks, such as TensorFlow and pyTorch, will be able to use LUMI-G directly.

The Metacenter is still building documentation for taking advantage of accelerator resources. Researchers that want to begin the transition should evaluate OpenACC (our documentation can be found here), OpenMP or directly using accelerated libraries.


LUMI-C is the compute partition of LUMI, dealing with CPU based HPC applications. Users interested in this partition should also consider the other clusters already in operation in Norway.