DKRZ has long been devoted one of its departments to user consultancy. They support DKRZ’s users in the effective use of its systems by providing general personal advice on the use of the systems, helping users to port applications to the HPC systems, and by offering conceptual guidance on parallelization and optimization strategies for user code, specifically with respect to the provided HPC system.
Regional Computing Center / Regionales Rechenzentrum der Universität Hamburg (RRZ)
The HPC team at RRZ operates a 396 node Linux cluster and more than 2 PByte of disk storage. The team is part of the consulting network of the North German Supercomputing Alliance (Höchstleistungsrechenzentrum Nord (HLRN) in German). HPC activities (locally and for HLRN) include user support, user education (in parallel programming and single-processor optimization) and benchmarking. RRZ maintains and further develops BQCD (Berlin quantum chromodynamics program) as one of the HLRN application benchmark codes: BQCD (Download) (see also M. Allalen, M. Brehm, and H. Stüben. Performance of Quantum Chromodynamics (QCD) Simulations on the SGI Altix. Computational Methods in Science and Technology, 14(2):69–75, 2008).
Computer Center of Hamburg University of Technology / RZ der Technischen Universität Hamburg (TUHH RZ)
The TUHH RZ has HPC consultants to support local users as well as users of the North German Supercomputing Alliance (HLRN). TUHH RZ operates a 244 nodes Linux cluster. TUHH RZ and RRZ cooperate in sharing specialized parts of their HPC hardware.
Scientific Computing / Wissenschaftliches Rechnen at Universität Hamburg
The Scientific Computing group of Prof. Thomas Ludwig has a long history in parallel file system research but also investigates energy efficiency and cost-efficiency aspects and has developed tools for performance analysis. Prof. Ludwig is the director of German Climate Computing Center (DKRZ). The group is embedded into the German Climate Computing Center (DKRZ) since 2009 and, thus, also addresses important aspects for earth system scientists. With regards to teaching, the group offers interdisciplinary seminars and other courses about software engineering in science since 2012.
Scientific Visualization and Parallel Processing (SVPP) at Universität Hamburg
The Scientific Visualization group of Prof. Stephan Olbrich focuses on the development of methods for parallel data extraction and efficient rendering for volume and flow visualization of high-resolution, unsteady phenomena. Prof. Olbrich is the director of Regional Computing Center (RRZ). The group integrated their software into HPC applications, e.g., for climate research. Their activities are part of the cluster of excellence Integrated Climate System Analysis and Prediction (CliSAP) that focuses on post-processing data sets as well as on parallel data extraction at the runtime as part of the simulation.
Software Engineering and Construction Methods / Softwareentwicklungs- und -kontruktionsmethoden at Universität Hamburg
The Software Construction Methods group of Prof. Matthias Riebisch and his prior group at the Ilmenau University of Technology has experience in the adaptation and optimization of software architectures and software development processes. This includes for example, measuring software quality properties, the forecast of properties after changes using impact analysis techniques, and methods for partitioning software applications for optimized execution on parallel computing platforms.