HLRS provides frontends for software packages and a generic job submission web front end, based on an OpenStack environment. Currently, there is an OpenFOAM front end in place. Simulations are executed on Hazel Hen, HLRS’s primary machine.
The supercomputer Hazel Hen, a Cray XC40 system, is at the heart of HLRS’s high performance computing (HPC) system infrastructure. With a peak performance of 7.42 Petaflops (quadrillion floating point operations per second), Hazel Hen is one of the most powerful HPC systems in the world (position 8 of TOP500, 11/2015), as well as the fastest supercomputer in the European Union.
Hazel Hen, which was taken into operation in October 2015, is based on the Intel® Haswell Processor and the Cray Aries network and is designed for sustained application performance and high scalability. Each node is equipped with 2 sockets, each with 12 cores and 128 GB of memory. The system-wide storage capacity is approximately 10 PB.
HLRS offers nodes only exclusively, due to security and performance reasons. The minimum accounted resources include 24 cores (one node) and the maximum number of nodes to be requested for a job is 4096.