 Juqueen is a high-scaling supercomputer funded mainly by the Gauss Center for Supercomputing and by Helmholtz Association, and is hosted by the Eulich Supercomputing Center. It is a 28-rack, IBM Blue Gene-slash-Q registered system combining 28,672 compute nodes through a high-speed network providing an overall peak performance of 5.9 petaflops. This article was authored by Michael Steffen and Yuta Doctor.