Dipl.-Inf. Andreas Schäfer

Research Interests

My research takes place at the boundary between scientific computing applications and high-performance computing: I provide other scientists with tools, enabling them to harness today's parallel computers. For my PhD thesis I focus on LibGeoDecomp, an auto-parallelizing library for stencil codes.

Apart from research, my position also includes teaching (e.g. the lecture Architectures of Supercomputers, which I hold in the winter terms) and administration of our chair's HPC servers.

Scientific Computing

• computer simulation
• stencil codes
• geometric decomposition codes (e.g. meshfree methods)

High-Performance Computing

• cluster computing (particularly multi-clusters)
• multi-cores (cache effects, vectorization)
• accelerators (GPGPUs, Cell BE, and FPGA integration)

Publications

• Schäfer, Andreas:
  LibGeoDecomp Developer Guide.
  Talk: , FAU Erlangen
  Erlangen, 11.01.2012
• Schäfer, Andreas; Reichenbach, Marc; Fey, Dietmar:
  Collaborative Administration in the Context of Research Computing Systems.
  In: Ao, S.I. ; Douglas, Craig (Ed.): World Congress on Engineering and Computer Science 2011
  (WCECS 2011, Berkeley, CA, USA, 19.-21.10.2011). vol. 1, 1. ed.
  San Francisco: IAENG, 2011, pp. 1092-1097. - ISBN 9789881925176
• Seidler, Ralf; Schäfer, Andreas; Fey, Dietmar:
  Fast Dot Correlation in Optical Metrology on GPGPUs.
  In: Arabni, Hamid R.; Uto, Minoru; Joe, Kazuki; Nishikawa, Hiroaki; Ishii, Hiroshi; Tinetti, Fernando G.; Solo, Ashu M. G.; Gravvanis, George A. (Ed.): Proceedings of The 2011 International Conference on Parallel and Distributed Processing Technology and Applications
  (PDPTA 2011, Las Vegas, 18.Jul-21.Jul 2011). vol. 1, 1. ed.
  Las Vegas: CSREA Press, 2011, pp. 248-254. - ISBN 1-60132-193-7
• Schäfer, Andreas; Fey, Dietmar:
  High Performance Stencil Code Algorithms for GPGPUs.
  In: Sato, Mitsuhisa ; Matsuoka, Satoshi ; Sloot, Peter M. ; van Albada, G. Dick ; Dongarra, Jack (Ed.): Proceedings of the International Conference on Computational Science
  (ICCS 2011, Nanyang Technological University, Singapur, 01.-03.06.2011).
  2011.
• Schäfer, Andreas; Fey, Dietmar:
  High Performance Stencil Code Algorithms for GPGPUs.
  In: Sato, Mitsuhisa ; Matsuoka, Satoshi ; Sloot, Peter M. ; van Albada, G. Dick ; Dongarra, Jack (Ed.): Proceedings of the International Conference on Computational Science
  (ICCS 2011, Nanyang Technological University, Singapur, 01.-03.06.2011).
  2011.
• Schäfer, Andreas:
  LibGeoDecomp - How To Create Teraflop Simulations Within Minutes.
  Talk: ASIM Workshop 2011, Leibniz-Rechenzentrum München
  Garching, 15.03.2011
• Schäfer, Andreas; Hammer, Julian ; Fey, Dietmar:
  Parallel Simulation of Dendritic Growth On Unstructured Grids.
  Talk: SC11: Workshop on Irregular Applications: Irregular Applications: Architectures & Algorithms, SC11
  Seattle, 13.11.2011
• Schäfer, Andreas; Fey, Dietmar; Hammer, Julian:
  Parallel simulation of dendritic growth on unstructured grids.
  In: Feo, John; Villa, Oreste ; Tumeo, Antonino ; Secchi, Simone (Ed.): IAAA '11: Proceedings of the first workshop on Irregular applications: architectures and algorithms
  (SC'11 SC Conference on High Performance Computing Networking, Storage and Analysis Seattle, Seattle, 13.11.2011).
  New York, NY, USA: ACM, 2011, pp. 15-22. - ISBN 978-1-4503-1121-2
• Schäfer, Andreas:
  Past, Present and Future of LibGeoDecomp, an Auto-parallelizing Stencil Code Library.
  Talk: Computing Sciences Seminar, Lawrence Berkeley Lab
  Berkeley, CA, USA, 19.10.2011
• Seidler, Ralf; Schmidt, Michael; Schäfer, Andreas; Fey, Dietmar:
  Comparison of Selected Parallel Path Planning Algorithms on GPGPUs and Multi-Core.
  In: Global Science and Technology Forum (GSTF) (Org.): Proc. of the Annual International Conference on Advances in Distributed and Parallel Computing (ADPC 2010)
  (Annual International Conference on Advances in Distributed and Parallel Computing (ADPC 2010), Singapur, 1.-2. November 2010).
  Singapur: Global Science and Technology Forum (GSTF), 2010, pp. A133-A139. - ISBN 978-981-08-7656-2
• Seidler, Ralf; Schmidt, Michael; Schäfer, Andreas; Fey, Dietmar:
  Efficient Implementation of Selected Parallel Path Planning Algorithms on GPUs.
  In: Global Science and Technology Forum (GSTF); Bharat Bhargava: Journal on Computing vol. 1, 1. ed.
  Singpur: Global Science and Technology Forum (GSTF), 2010, pp. 0-0. (GSTF International Journal on Computing (JoC) vol. 1)
• Schäfer, Andreas:
  Geometrische Zerlegung.
  In: Fey, Dietmar (Ed.): Grid-Computing: Grid Computing für Computational Science
  Berlin: Springer, 2010, pp. 439-466. - ISBN 3540797467
• Schäfer, Andreas; Fey, Dietmar:
  Tool for Automated Generation of MPI Typemaps.
  In: Alameh, Kamal ; Sokolinsky, Leonid B. ; Chao-Tung, Yang (Ed.): International Conference on High Performance Computing Systems (HPCS-10)
  (International Conference on High Performance Computing Systems (HPCS-10), Orlando, FL, USA, 12-14.07.2010).
  Orlando: ISRST, 2010, pp. 92-96. - ISBN 978-1-60651-020-9
• Erdmann, Jakob; Schäfer, Andreas; Kauhaus, Andreas; Fey, Dietmar:
  A profitability heuristic that reduces the parameter dependence of dynamic load balancing.
  In: GI e.V. Bonn (Ed.): Informatiktage 2008 Fachwissenschaftlicher Informatik-Kongress
  Bonn/Berlin: Köllen, 2008, pp. 217-219. (GI-Edition. Seminar 6 vol. LNI) - ISBN 978-3-88579-440-0
• Schäfer, Andreas; Fey, Dietmar:
  LibGeoDecomp: A Grid-enabled Library for Geometric Decomposition Codes.
  In: Lastovetsky, Alexey; Kechadi, Tahar; Dongarra, Jack (Ed.): Lecture Notes in Computer Science: Recent Advances in Parallel Virtual Machine and Message Passing Interface
  (15th European PVM/MPI Users’ Group Meeting, Dublin, 2008). vol. 5205
  Berlin: Springer, 2008, pp. 285-294. - ISBN 978-3-540-87474-4
• Schäfer, Andreas; Fey, Dietmar:
  Pollarder: An architecture concept for self-adapting parallel applications in computational science.
  In: Bubak, Marian; Albada, G. Dick van; Dongarra, Jack; Sloot, Peter M.A. (Ed.): Computational Science - ICCS 2008
  Berlin, Heidelberg: Springer Verlag, 2008, pp. 174-183. (Computational Science - ICCS 2008 vol. LNCS) - ISBN 978-3-540-69383-3
• Schäfer, Andreas:
  Job Distribution Framework for Large Scale Clusters and Grids.
  In: IP.com Prior Art Database (2007), pp. 1-7
• Schäfer, Andreas; Erdmann, Jakob; Fey, Dietmar:
  Simulation of Dendritic Growth for Materials Science in Multi-Cluster Environments.
  In: Fey, Dietmar (Ed.): Workshop Grid-Technologie für den Entwurf technischer Systeme (Grid4TS)
  (Workshop Grid-Technologie für den Entwurf technischer Systeme (Grid4TS),, Dresden, November 2007).
  2007, pp. 1-8.
• Schäfer, Andreas:
  Harpy - High Throughput Computing.
  Jena, Friedrich-Schiller-Universität Jena, Dipl. thesis, 2006
• Schäfer, Andreas:
  Rock'n'Roll: An Engine for the Board Game "EinStein würfelt nicht".
  Talk: Invited talk at the 17th Workshop in Discrete Optimization, Friedrich-Schiller-Universität Jena
  Siegmundsburg, Germany, 2006
• Santosa, Mulyadi; Schäfer, Andreas:
  Build a Heterogeneous Cluster with coLinux and openMosix.
  In: IBM DeveloperWorks (2005), pp. 1-1
• Schäfer, Andreas; Fey, Dietmar:
  Harpy - Employing a Process Migration Facility and a User Mode Linux for High Throughput Computing.
  In: Gesellschaft für Informatik (Ed.): Informatiktage 2005: Fachwissenschaftlicher Informatik-Kongress
  (GI Informatiktage 2005, Bonn, 8.-9. April 2005). 1. ed.
  Bonn: Köllen, 2005, pp. 100-105. - ISBN 3885794365
• Kauhaus, Christian; Schäfer, Andreas; Fey, Dietmar:
  Harpy: A Virtual Machine Based Approach to High-Throughput Cluster Computing.
  Jena: Friedrich-Schiller-Universität Jena. 2005
  - Internal Report
• Schäfer, Andreas; Althöfer, Ingo:
  Rock'n'Roll - A cross-platform engine for the board game "EinStein würfelt nicht".
  Jena: Friedrich-Schiller-Universität Jena. 2005
  - Internal Report
• Schäfer, Andreas:
  The "More for Less"-Paradox in Transportation Problems with Infinite-Dimensional Supply and Demand Vectors.
  Talk: Kolloquium über Kombinatorik, Otto-von-Guericke-Universität Magdeburg
  Magdeburg, 14.11..2004
• Althöfer, Ingo; Schäfer, Andreas:
  The "More for Less"-Paradox in Transportation Problems with Infinite-Dimensional Supply and Demand Vectors.
  Jena: Friedrich-Schiller-Universität Jena. 2004
  - Internal Report

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