Prof. Dr. Julian Kunkel

Julian Kunkel moved now to the University of Reading but remains responsible for several projects. Previously, he was employed at the German Climate Computing Center (DKRZ) as a postdoctoral researcher in the research department of DKRZ that is joint with the Scientific Computing group at the Universität Hamburg. Julian gained interest in the topic of HPC storage during his studies of computer science in 2003. Since then, he researches methods to improve efficiency of storage systems in general.
Besides his main goal to provide efficient and performance-portable I/O, his HPC-related interests are: data reduction techniques, performance analysis of parallel applications and parallel I/O, management of cluster systems, cost-efficiency considerations, and software engineering of scientific software. In 2013, he defended his thesis about monitoring and simulation of parallel programs on application and system level. Dr. Kunkel is member of many international program committees.

• AIMES
• PeCoH
• Bull I/O Cooperation
• ESiWACE
• IPCC for Lustre
• ICOMEX
• SIOX

• Simulation of Parallel Programs on Application and System Level (Julian Kunkel), PhD Thesis, Advisors: Thomas Ludwig, 2013-07-30, Thesis – Publication details – URL
• Towards Automatic Load Balancing of a Parallel File System with Subfile Based Migration (Julian Kunkel), Master's Thesis, Advisors: Thomas Ludwig, 2007-08-02, Thesis – Publication details – URL
• Performance Analysis of the PVFS2 Persistency Layer (Julian Kunkel), Bachelor's Thesis, Advisors: Thomas Ludwig, 2006-02-15, Thesis – Publication details – URL

• Optimizing Memory Bandwidth Efficiency with User-Preferred Kernel Merge (Nabeeh Jumah, Julian Kunkel), In Euro-Par 2019: Parallel Processing Workshops, Lecture Notes in Computer Science (LNCS), Springer, COLOC: 3rd workshop on data locality/Euro-Par 2019, Göttingen, Germany, 2019-08-26
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• D3.4 Performance Results and Conclusions (Nabeeh Jumah, Hisashi Yashiro, Julian Kunkel), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2019-07-31
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• Scalable Parallelization of Stencils using MODA (Nabeeh Jumah, Julian Kunkel), In High Performance Computing, Lecture Notes in Computer Science, Springer International Publishing, ISC 2019 Workshop: P3MA, Frankfurt, Germany, 2019-06-20
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• D3.3 Mini-IGCMs (Nabeeh Jumah, Julian Kunkel), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2019-03-20
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• D3.1 Mini-IGCMs Version 1 (Nabeeh Jumah, Julian Kunkel), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2019-03-04
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• D1.3 Advanced Source-to-Source Translation Tools (Nabeeh Jumah, Julian Kunkel), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2019-03-04
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• Towards an HPC Certification Program (Julian Kunkel, Kai Himstedt, Nathanael Hübbe, Hinnerk Stüben, Sandra Schröder, Michael Kuhn, Matthias Riebisch, Stephan Olbrich, Thomas Ludwig, Weronika Filinger, Jean-Thomas Acquaviva, Anja Gerbes, Lev Lafayette), In Journal of Computational Science Education, (Editors: Steven I. Gordon), ISSN: 2153-4136, 2019-01
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• Automatic Vectorization of Stencil Codes with the GGDML Language Extensions (Nabeeh Jumah, Julian Kunkel), In Proceedings of the 5th Workshop on Programming Models for SIMD/Vector Processing, WPMVP'19, ACM, Principles and Practice of Parallel Programming 2019, Washington, DC, USA, 2019
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• Towards Green Scientific Data Compression Through High-Level I/O Interfaces (Yevhen Alforov, Anastasiia Novikova, Michael Kuhn, Julian Kunkel, Thomas Ludwig), In 30th International Symposium on Computer Architecture and High Performance Computing, pp. 209–216, IEEE (Los Alamitos, California), SBAC-PAD 2018, Lyon, France, ISBN: 978-1-5386-7769-8, 2018-09
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• A Survey of Storage Systems for High-Performance Computing (Jakob Lüttgau, Michael Kuhn, Kira Duwe, Yevhen Alforov, Eugen Betke, Julian Kunkel, Thomas Ludwig), In Supercomputing Frontiers and Innovations, Series: Volume 5, Number 1, pp. 31–58, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2018-04
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• D1.2 DSL Concepts for Icosahedral Models (Nabeeh Jumah, Julian Kunkel, Michel Müller), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2018-03-19
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• Performance Portability of Earth System Models with User-Controlled GGDML code Translation (Nabeeh Jumah, Julian Kunkel), In High Performance Computing, Lecture Notes in Computer Science (11203), Springer International Publishing, ISC 2018 Workshops, Frankfurt, Germany, 2018
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• Towards Decoupling the Selection of Compression Algorithms from Quality Constraints – an Investigation of Lossy Compression Efficiency (Julian Kunkel, Anastasiia Novikova, Eugen Betke), In Supercomputing Frontiers and Innovations, Series: Volume 4, Number 4, pp. 17–33, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2017-12
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• Understanding Hardware and Software Metrics with respect to Power Consumption (Julian Kunkel, Manuel F. Dolz), In Sustainable Computing: Informatics and Systems, Series: Sustainable Computing, (Editors: Ishfaq Ahmad), Elsevier, ISSN: 2210-5379, 2017-11-04
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• GGDML: Icosahedral Models Language Extensions (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), In Journal of Computer Science Technology Updates, Series: Volume 4, Number 1, pp. 1–10, Cosmos Scholars Publishing House, 2017-06-21
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• D1.1 Model-Specific Dialect Formulations (Nabeeh Jumah, Julian Kunkel, Michel Müller, Hisashi Yashiro, Thomas Dubos, John Thuburn), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2017-06-04
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• SFS: A Tool for Large Scale Analysis of Compression Characteristics (Julian Kunkel), Research Papers (4), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2017-05-05
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• Interaktiver C-Programmierkurs, ICP (Julian Kunkel, Jakob Lüttgau), In HOOU Content Projekte der Vorprojektphase 2015/16 – Sonderband zum Fachmagazin Synergie (Kerstin Mayrberger), pp. 182–186, Universität Hamburg (Universität Hamburg, Mittelweg 177, 20148 Hamburg), ISBN: 978-3-924330-57-6, 2017-04-10
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• Real-Time I/O-Monitoring of HPC Applications with SIOX, Elasticsearch, Grafana and FUSE (Eugen Betke, Julian Kunkel), In High Performance Computing: ISC High Performance 2017 International Workshops, DRBSD, ExaComm, HCPM, HPC-IODC, IWOPH, IXPUG, P^3MA, VHPC, Visualization at Scale, WOPSSS, Lecture Notes in Computer Science (10524), pp. 158–170, (Editors: Julian Kunkel, Rio Yokota, Michaela Taufer, John Shalf), Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6, 2017
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• Toward Decoupling the Selection of Compression Algorithms from Quality Constraints (Julian Kunkel, Anastasiia Novikova, Eugen Betke, Armin Schaare), In High Performance Computing: ISC High Performance 2017 International Workshops, DRBSD, ExaComm, HCPM, HPC-IODC, IWOPH, IXPUG, P^3MA, VHPC, Visualization at Scale, WOPSSS, Lecture Notes in Computer Science (10524), pp. 1–12, (Editors: Julian Kunkel, Rio Yokota, Michaela Taufer, John Shalf), Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6, 2017
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• An MPI-IO In-Memory Driver for Non-Volatile Pooled Memory of the Kove XPD (Julian Kunkel, Eugen Betke), In High Performance Computing: ISC High Performance 2017 International Workshops, DRBSD, ExaComm, HCPM, HPC-IODC, IWOPH, IXPUG, P^3MA, VHPC, Visualization at Scale, WOPSSS, Lecture Notes in Computer Science (10524), pp. 644–655, (Editors: Julian Kunkel, Rio Yokota, Michaela Taufer, John Shalf), Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6, 2017
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• A Novel String Representation and Kernel Function for the Comparison of I/O Access Patterns (Raul Torres, Julian Kunkel, Manuel Dolz, Thomas Ludwig), In International Conference on Parallel Computing Technologies, Lecture Notes in Computer Science (10421), pp. 500–512, (Editors: Victor Malyshkin), Springer, PaCT, Nizhni Novgorod, Russia, ISBN: 978-3-319-62932-2, 2017
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• Simulation of Hierarchical Storage Systems for TCO and QoS (Jakob Lüttgau, Julian Kunkel), In High Performance Computing: ISC High Performance 2017 International Workshops, DRBSD, ExaComm, HCPM, HPC-IODC, IWOPH, IXPUG, P^3MA, VHPC, Visualization at Scale, WOPSSS, Lecture Notes in Computer Science (10524), pp. 116–128, (Editors: Julian Kunkel, Rio Yokota, Michaela Taufer, John Shalf), Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6, 2017
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• Interaktiver C-Programmierkurs, ICP (Julian Kunkel, Jakob Lüttgau), In Synergie, Fachmagazin für Digitalisierung in der Lehre (2), pp. 74–75, 2016-11-16
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• Predicting I/O Performance in HPC Using Artificial Neural Networks (Jan Fabian Schmid, Julian Kunkel), In Supercomputing Frontiers and Innovations, Series: Volume 3, Number 3, pp. 34–39, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2016-10
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• Analyzing Data Properties using Statistical Sampling – Illustrated on Scientific File Formats (Julian Kunkel), In Supercomputing Frontiers and Innovations, Series: Volume 3, Number 3, pp. 19–33, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2016-10
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• Data Compression for Climate Data (Michael Kuhn, Julian Kunkel, Thomas Ludwig), In Supercomputing Frontiers and Innovations, Series: Volume 3, Number 1, pp. 75–94, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2016-06
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• Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), In High Performance Computing: ISC High Performance 2016 International Workshops, ExaComm, E-MuCoCoS, HPC-IODC, IXPUG, IWOPH, P3MA, VHPC, WOPSSS, Lecture Notes in Computer Science (9945 2016), pp. 130–141, (Editors: Michela Taufer, Bernd Mohr, Julian Kunkel), Springer, ISC-HPC 2017, Frankfurt, Germany, ISBN: 978-3-319-46079-6, 2016-06
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• Towards Automatic and Flexible Unit Test Generation for Legacy HPC Code (Christian Hovy, Julian Kunkel), In Proceedings of the Fourth International Workshop on Software Engineering for High Performance Computing in Computational Science and Engineering, SEHPCCSE16, Salt Lake City, Utah, USA, 2016
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• Monitoring energy consumption with SIOX (Julian Kunkel, Alvaro Aguilera, Nathanael Hübbe, Marc Wiedemann, Michaela Zimmer), In Computer Science – Research and Development, Series: Volume 30, Number 2, pp. 125–133, Springer, ISSN: 1865-2034, 2015-05
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• Identifying Relevant Factors in the I/O-Path using Statistical Methods (Julian Kunkel), Research Papers (3), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2015-03-14
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• Speicherung großer Datenmengen und Energieeffizienz (Thomas Ludwig, Manuel Dolz, Michael Kuhn, Julian Kunkel, Hermann Lenhart), Max-Planck-Gesselschaft (München), 2015
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• An analytical methodology to derive power models based on hardware and software metrics (Manuel F. Dolz, Julian Kunkel, Konstantinos Chasapis, Sandra Catalan), In Computer Science - Research and Development, pp. 1–10, Springer US, ISSN: 1865-2042, 2015
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• Predicting Performance of Non-Contiguous I/O with Machine Learning (Julian Kunkel, Eugen Betke, Michaela Zimmer), In High Performance Computing, 30th International Conference, ISC High Performance 2015, Lecture Notes in Computer Science (9137), pp. 257–273, (Editors: Julian Martin Kunkel, Thomas Ludwig), ISC High Performance, Frankfurt, ISSN: 0302-9743, 2015
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• Exascale Storage Systems – An Analytical Study of Expenses (Julian Kunkel, Michael Kuhn, Thomas Ludwig), In Supercomputing Frontiers and Innovations, Series: Volume 1, Number 1, pp. 116–134, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), 2014-06
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• Whitepaper: E10 – Exascale IO (Andre Brinkmann, Toni Cortes, Hugo Falter, Julian Kunkel, Sai Narasimhamurthy), 2014-06
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• The SIOX Architecture – Coupling Automatic Monitoring and Optimization of Parallel I/O (Julian Kunkel, Michaela Zimmer, Nathanael Hübbe, Alvaro Aguilera, Holger Mickler, Xuan Wang, Andrij Chut, Thomas Bönisch, Jakob Lüttgau, Roman Michel, Johann Weging), In Supercomputing, Supercomputing, pp. 245–260, (Editors: Julian Kunkel, Thomas Ludwig, Hans Meuer), Springer International Publishing, ISC'14, ISC events, Leipzig, ISBN: 978-3-319-07517-4, 2014
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• A Comparison of Trace Compression Methods for Massively Parallel Applications in Context of the SIOX Project (Alvaro Aguilera, Holger Mickler, Julian Kunkel, Michaela Zimmer, Marc Wiedemann, Ralph Müller-Pfefferkorn), In Tools for High Performance Computing 2013, pp. 91–105, ISBN: 978-3-319-08143-4, 2014
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• Predicting Performance of Non-Contiguous I/O with Machine Learning (Julian Kunkel, Eugen Betke, Michaela Zimmer), In Parallel Data Storage Workshop (PDSW), Work in progress session, pp. 43–48, SC14, New Orleans, 2014
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• Feign: In-Silico Laboratory for Researching I/O Strategies (Jakob Lüttgau, Julian Kunkel), In Parallel Data Storage Workshop (PDSW), 2014 9th, pp. 43–48, SC14, New Orleans, 2014
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• ICON DSL: A Domain-Specific Language for climate modeling (Raul Torres, Leonidas Lindarkis, Julian Kunkel, Thomas Ludwig), In WOLFHPC 2013 Third International Workshop on Domain-Specific Languages and High-Level Frameworks for High Performance Computing, SC13, Denver, 2013-11-18
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• Using Simulation to Validate Performance of MPI(-IO) Implementations (Julian Kunkel), In Supercomputing, Lecture Notes in Computer Science (7905), pp. 181–195, (Editors: Julian Martin Kunkel, Thomas Ludwig, Hans Werner Meuer), Springer (Berlin, Heidelberg), ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743, 2013-06
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• Evaluating Lossy Compression on Climate Data (Nathanael Hübbe, Al Wegener, Julian Kunkel, Yi Ling, Thomas Ludwig), In Supercomputing, Lecture Notes in Computer Science (7905), pp. 343–356, (Editors: Julian Martin Kunkel, Thomas Ludwig, Hans Werner Meuer), Springer (Berlin, Heidelberg), ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743, 2013-06
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• Towards Self-optimization in HPC I/O (Michaela Zimmer, Julian Kunkel, Thomas Ludwig), In Supercomputing, Lecture Notes in Computer Science (7905), pp. 422–434, (Editors: Julian Martin Kunkel, Thomas Ludwig, Hans Werner Meuer), Springer (Berlin, Heidelberg), ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743, 2013-06
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• Performance-optimized clinical IMRT planning on modern CPUs (Peter Ziegenhein, Cornelis Ph Kamerling, Mark Bangert, Julian Kunkel, Uwe Oelfke), In Physics in Medicine and Biology, Series: Volume 58 Number 11, IOP Publishing, ISSN: 1361-6560, 2013-05-08
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• Reducing the HPC-Datastorage Footprint with MAFISC – Multidimensional Adaptive Filtering Improved Scientific data Compression (Nathanel Hübbe, Julian Kunkel), In Computer Science - Research and Development, Series: Volume 28, Issue 2-3, pp. 231–239, Springer, 2013-05
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• Simulating parallel programs on application and system level (Julian Kunkel), In Computer Science - Research and Development, Series: Volume 28, Issue 2-3, pp. 167–174, Springer, 2013-05
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• Towards I/O Analysis of HPC Systems and a Generic Architecture to Collect Access Patterns (Marc Wiedemann, Julian Kunkel, Michaela Zimmer, Thomas Ludwig, Michael Resch, Thomas Bönisch, Xuan Wang, Andriy Chut, Alvaro Aguilera, Wolfgang E. Nagel, Michael Kluge, Holger Mickler), In Computer Science - Research and Development, Series: 28, pp. 241–251, Springer New York Inc. (Hamburg, Berlin, Heidelberg), ISSN: 1865-2034, 2013-05
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• A Study on Data Deduplication in HPC Storage Systems (Dirk Meister, Jürgen Kaiser, Andre Brinkmann, Michael Kuhn, Julian Kunkel, Toni Cortes), In Proceedings of the ACM/IEEE Conference on High Performance Computing (SC), IEEE Computer Society, SC'12, Salt Lake City, USA, 2012-11-10
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• Simulating parallel programs on application and system level (Julian Kunkel), In Computer Science – Research and Development, Series: Volume 28 Number 2-3, Springer (Berlin, Heidelberg), ISSN: 1865-2042, 2012-06
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• Simulating Application and System Interaction with PIOsimHD (Julian Kunkel, Thomas Ludwig), In Proceedings of the Work in Progress Session, 20th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, SEA-Publications (31), (Editors: Erwin Grosspietsch, Konrad Klöckner), Institute for Systems Engineering and Automation (Johannes Kepler University Linz), PDP 2012, Munich Network Management Team, Garching, Germany, ISBN: 978-3-902457-31-8, 2012
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• Simulation-Aided Performance Evaluation of Server-Side Input/Output Optimizations (Michael Kuhn, Julian Kunkel, Thomas Ludwig), In 20th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, pp. 562–566, (Editors: Rainer Stotzka, Michael Schiffers, Yiannis Cotronis), IEEE Computer Society (Los Alamitos, Washington, Tokyo), PDP 2012, Munich Network Management Team, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192, 2012
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• Optimizations for Two-Phase Collective I/O (Michael Kuhn, Julian Kunkel, Yuichi Tsujita, Hidetaka Muguruma, Thomas Ludwig), In Applications, Tools and Techniques on the Road to Exascale Computing, Advances in Parallel Computing (22), pp. 455–462, (Editors: Koen De Bosschere, Erik H. D'Hollander, Gerhard R. Joubert, David Padua, Frans Peters), IOS Press (Amsterdam, Berlin, Tokyo, Washington DC), ParCo 2011, University of Ghent, ELIS Department, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452, 2012
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• Visualization of MPI(-IO) Datatypes (Julian Kunkel, Thomas Ludwig), In Applications, Tools and Techniques on the Road to Exascale Computing, Advances in Parallel Computing (22), pp. 473–480, (Editors: Koen De Bosschere, Erik H. D'Hollander, Gerhard R. Joubert, David Padua, Frans Peters), IOS Press (Amsterdam, Berlin, Tokyo, Washington DC), ParCo 2011, University of Ghent, ELIS Department, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452, 2012
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• Tool Environments to Measure Power Consumption and Computational Performance (Timo Minartz, Daniel Molka, Julian Kunkel, Michael Knobloch, Michael Kuhn, Thomas Ludwig), In Handbook of Energy-Aware and Green Computing (Ishfaq Ahmad, Sanjay Ranka), Chapters: 31, pp. 709–743, Chapman and Hall/CRC Press Taylor and Francis Group (6000 Broken Sound Parkway NW, Boca Raton, FL 33487), ISBN: 978-1-4398-5040-4, 2012
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• Scientific Computing: Performance and Efficiency in Climate Models (Sandra Schröder, Michael Kuhn, Nathanael Hübbe, Julian Kunkel, Timo Minartz, Petra Nerge, Florens Wasserfall, Thomas Ludwig), In Proceedings of the Work in Progress Session, 20th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, SEA-Publications (31), (Editors: Erwin Grosspietsch, Konrad Klöckner), Institute for Systems Engineering and Automation (Johannes Kepler University Linz), PDP 2012, Munich Network Management Team, Garching, Germany, ISBN: 978-3-902457-31-8, 2012
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• Reducing the HPC-Datastorage Footprint with MAFISC - Multidimensional Adaptive Filtering Improved Scientific data Compression (Nathanael Hübbe, Julian Kunkel), In Computer Science - Research and Development, Springer (Hamburg, Berlin, Heidelberg), ISC 2012, Executive Committee, CCH–Congress Center Hamburg, Germany, 2012
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• IOPm – Modeling the I/O Path with a Functional Representation of Parallel File System and Hardware Architecture (Julian Kunkel, Thomas Ludwig), In 20th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, pp. 554–561, (Editors: Rainer Stotzka, Michael Schiffers, Yiannis Cotronis), IEEE Computer Society (Los Alamitos, Washington, Tokyo), PDP 2012, Munich Network Management Team, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192, 2012
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• HDTrace – A Tracing and Simulation Environment of Application and System Interaction (Julian Kunkel), Research Papers (2), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2011-01-23
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• Towards an Energy-Aware Scientific I/O Interface – Stretching the ADIOS Interface to Foster Performance Analysis and Energy Awareness (Julian Kunkel, Timo Minartz, Michael Kuhn, Thomas Ludwig), In Computer Science - Research and Development, Series: 1, (Editors: Thomas Ludwig), Springer (Berlin / Heidelberg, Germany), 2011
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• System Performance Comparison of Stencil Operations with the Convey HC-1 (Julian Kunkel, Petra Nerge), Technical Reports (1), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2010-11-16
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• Classification of Network Computers Based on Distribution of ICMP-echo Round-trip Times (Julian Kunkel, Jan C. Neddermeyer, Thomas Ludwig), Research Papers (1), Staats- und Universitätsbibliothek Hamburg (Carl von Ossietzky, Von-Melle-Park 3, 20146 Hamburg), 2010-09-28
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• From experimental setup to bioinformatics: an RNAi screening platform to identify host factors involved in HIV-1 replication (Kathleen Börner, Johannes Hermle, Christoph Sommer, Nigel P. Brown, Bettina Knapp, Bärbel Glass, Julian Kunkel, Gloria Torralba, Jürgen Reymann, Nina Beil, Jürgen Beneke, Rainer Pepperkok, Reinhard Schneider, Thomas Ludwig, Michael Hausmann, Fred Hamprecht, Holger Erfle, Lars Kaderali, Hans-Georg Kräusslich, Maik J. Lehmann), In Biotechnology Journal, Series: 5-1, pp. 39–49, WILEY-VCH (Weinheim, Germany), ISSN: 1860-7314, 2010-01
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• I/O Performance Evaluation with Parabench – Programmable I/O Benchmark (Olga Mordvinova, Dennis Runz, Julian Kunkel, Thomas Ludwig), In Procedia Computer Science, Series: 1-1, pp. 2119–2128, Elsevier B.V (Amsterdam, Netherlands), ISSN: 1877-0509, 2010
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• Simulation of power consumption of energy efficient cluster hardware (Timo Minartz, Julian Kunkel, Thomas Ludwig), In Computer Science - Research and Development, Series: 3, pp. 165–175, (Editors: Thomas Ludwig), Springer (Berlin / Heidelberg, Germany), ISSN: 1865-2034, 2010
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• Collecting Energy Consumption of Scientific Data (Julian Kunkel, Olga Mordvinova, Michael Kuhn, Thomas Ludwig), In Computer Science - Research and Development, Series: 3, pp. 1–9, (Editors: Thomas Ludwig), Springer (Berlin / Heidelberg, Germany), ISSN: 1865-2034, 2010
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• Tracing Performance of MPI-I/O with PVFS2: A Case Study of Optimization (Yuichi Tsujita, Julian Kunkel, Stephan Krempel, Thomas Ludwig), In Parallel Computing: From Multicores and GPU's to Petascale, pp. 379–386, IOS Press, PARCO 2009, ISBN: 978-1-60750-530-3, 2010
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• Tracing Internal Communication in MPI and MPI-I/O (Julian Kunkel, Yuichi Tsujita, Olga Mordvinova, Thomas Ludwig), In International Conference on Parallel and Distributed Computing, Applications and Technologies, PDCAT, pp. 280–286, IEEE Computer Society (Washington, DC, USA), PDCAT-09, Hiroshima University, Higashi Hiroshima, Japan, ISBN: 978-0-7695-3914-0, 2009-12-29
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• USB Flash Drives as an Energy Efficiency Storage Alternative (Olga Mordvinova, Julian Kunkel, Christian Baun, Thomas Ludwig, Marcel Kunze), In Proceedings of the 10th IEEE/ACM International Conference on Grid Computing, pp. 175–182, IEEE Computer Society (Washington, DC, USA), GRID-09, IEEE/ACM, Banff, Alberta, Canada, ISBN: 978-1-4244-5148-7, 2009-10
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• Dynamic file system semantics to enable metadata optimizations in PVFS (Michael Kuhn, Julian Kunkel, Thomas Ludwig), In Concurrency and Computation: Practice and Experience, Series: 21-14, pp. 1775–1788, John Wiley and Sons Ltd. (Chichester, UK), ISSN: 1532-0626, 2009
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• Small-file Access in Parallel File Systems (Philip Carns, Sam Lang, Robert Ross, Murali Vilayannur, Julian Kunkel, Thomas Ludwig), In IPDPS '09: Proceedings of the 2009 IEEE International Symposium on Parallel and Distributed Processing, pp. 1–11, IEEE Computer Society (Washington, DC, USA), IPDPS-09, University of Rome, Rome, Italy, ISBN: 978-1-4244-3751-1, 2009
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• Using Non-blocking I/O Operations in High Performance Computing to Reduce Execution Times (David Buettner, Julian Kunkel, Thomas Ludwig), In Proceedings of the 16th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface, pp. 134–142, Springer-Verlag (Berlin, Heidelberg), EuroPVM/MPI-09, CSC - IT, Espoo, Finland, ISBN: 978-3-642-03769-6, 2009
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• Directory-Based Metadata Optimizations for Small Files in PVFS (Michael Kuhn, Julian Kunkel, Thomas Ludwig), In Euro-Par '08: Proceedings of the 14th international Euro-Par conference on Parallel Processing, pp. 90–99, Springer-Verlag (Berlin, Heidelberg), Euro-Par-08, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0, 2008 – Awards: Best Paper
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• Bottleneck Detection in Parallel File Systems with Trace-Based Performance Monitoring (Julian Kunkel, Thomas Ludwig), In Euro-Par '08: Proceedings of the 14th international Euro-Par conference on Parallel Processing, pp. 212–221, Springer-Verlag (Berlin, Heidelberg), Euro-Par-08, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0, 2008
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• Analysis of the MPI-IO Optimization Levels with the PIOViz Jumpshot Enhancement (Thomas Ludwig, Stephan Krempel, Michael Kuhn, Julian Kunkel, Christian Lohse), In Recent Advances in Parallel Virtual Machine and Message Passing Interface, Lecture Notes in Computer Science (4757), pp. 213–222, (Editors: Franck Cappello, Thomas Hérault, Jack Dongarra), Springer (Berlin / Heidelberg, Germany), EuroPVM/MPI-07, Institut national de recherche en informatique et automatique, Paris, France, ISBN: 978-3-540-75415-2, 2007
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• Performance Evaluation of the PVFS2 Architecture (Julian Kunkel, Thomas Ludwig), In PDP '07: Proceedings of the 15th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, pp. 509–516, IEEE Computer Society (Washington, DC, USA), PDP-07, Euromicro, Napoli, Italy, ISBN: 0-7695-2784-1, 2007
  Publication details – DOI

• Tracing the MPI-IO Calls' Disk Accesses (Thomas Ludwig, Stephan Krempel, Julian Kunkel, Frank Panse, Dulip Withanage), In Recent Advances in Parallel Virtual Machine and Message Passing Interface, Lecture Notes in Computer Science (4192), pp. 322–330, (Editors: Bernd Mohr, Jesper Larsson Träff, Joachim Worringen, Jack Dongarra), Springer (Berlin / Heidelberg, Germany), EuroPVM/MPI-06, C&C Research Labs, NEC Europe Ltd., and the Research Centre Jülich, Bonn, Germany, ISBN: 3-540-39110-X, 2006
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• Performance Conscious HPC (PeCoH) – 2019 (Kai Himstedt, Nathanael Hübbe, Sandra Schröder, Hendryk Bockelmann, Michael Kuhn, Julian Kunkel, Thomas Ludwig, Stephan Olbrich, Matthias Riebisch, Markus Stammberger, Hinnerk Stüben), Frankfurt, Germany, ISC High Performance 2019, 2019-06-18
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• Advanced Computation and I/O Methods for Earth-System Simulations (AIMES) (Nabeeh Jumah, Julian Kunkel, Anastasiia Novikova, Thomas Ludwig, Thomas Dubos, Sunmin Park, Hisashi Yashiro, Günther Zängl, John Thuburn), Germany, Frankfurt, ISC 2019, 2019-06-18
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• Performance Conscious HPC (PeCoH) – 2018 (Kai Himstedt, Nathanael Hübbe, Sandra Schröder, Hendryk Bockelmann, Michael Kuhn, Julian Kunkel, Thomas Ludwig, Stephan Olbrich, Matthias Riebisch, Markus Stammberger, Hinnerk Stüben), Frankfurt, Germany, ISC High Performance 2018, 2018-06-26
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• A user-controlled GGDML Code Translation Technique for Performance Portability of Earth System Models (Nabeeh Jumah, Julian Kunkel), Germany, Frankfurt, ISC 2018, 2018-06-26
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• Advanced Computation and I/O Methods for Earth-System Simulations (AIMES) (Julian Kunkel, Thomas Ludwig, Thomas Dubos, Naoya Maruyama, Takayuki Aoki, Günther Zängl, Hisashi Yashiro, Ryuji Yoshida, Hirofumi Tomita, Masaki Satoh, Yann Meurdesoif, Nabeeh Jumah, Anastasiia Novikova, Anja Gerbes), Germany, Frankfurt, ISC 2018, 2018-06-26
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• Automatic Profiling for Climate Modeling (Anja Gerbes, Nabeeh Jumah, Julian Kunkel), Bristol, United Kingdom, Euro LLVM, 2018-04-17
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• Adaptive Tier Selection for NetCDF and HDF5 (Jakob Lüttgau, Eugen Betke, Olga Perevalova, Julian Kunkel, Michael Kuhn), Denver, CO, USA, SC17, 2017-11-14
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• Toward Decoupling the Selection of Compression Algorithms from Quality Constraints (Julian Kunkel, Anastasia Novikova, Eugen Betke), Denver, CO, USA, SC17, 2017-11-14
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• Icosahedral Modeling with GGDML (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), Hamburg, Germany, DKRZ user workshop 2017, 2017-10-09
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• Performance Conscious HPC (PeCoH) (Julian Kunkel, Michael Kuhn, Thomas Ludwig, Matthias Riebisch, Stephan Olbrich, Hinnerk Stüben, Kai Himstedt, Hendryk Bockelmann, Markus Stammberger), Frankfurt, Germany, ISC High Performance 2017, 2017-06-20
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• FortranTestGenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Christian Hovy, Julian Kunkel), Frankfurt, ISC High Performance 2017, 2017-06-20
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• Enhanced Adaptive Compression in Lustre (Anna Fuchs, Michael Kuhn, Julian Kunkel, Thomas Ludwig), Frankfurt, Germany, ISC High Performance 2017, 2017-06-20
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• The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent), Frankfurt, Germany, ISC High Performance 2017, 2017-06-20
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• Towards Performance Portability for Atmospheric and Climate Models with the GGDML DSL (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), Germany, Frankfurt, ISC 2017, 2017-06-20
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• Advanced Computation and I/O Methods for Earth-System Simulations (AIMES) (Julian Kunkel, Thomas Ludwig, Thomas Dubos, Naoya Maruyama, Takayuki Aoki, Günther Zängl, Hisashi Yashiro, Ryuji Yoshida, Hirofumi Tomita, Masaki Satoh, Yann Meurdesoif, Nabeeh Jumah, Anastasiia Novikova), Germany, Frankfurt, ISC 2017, 2017-06-20
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• Intelligent Selection of Compiler Options to Optimize Compile Time and Performance (Anja Gerbes, Julian Kunkel, Nabeeh Jumah), Saarbrücken, Euro LLVM, 2017-03-27
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• Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), Frankfurt, ISC High Performance 2016, 2016-21-06 – Awards: Best Poster
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• Predicting I/O-performance in HPC using Artificial Neural Networks (Jan Fabian Schmid, Julian Kunkel), Frankfurt, ISC High Performance 2015, 2016-21-06
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• Utilizing In-Memory Storage for MPI-IO (Julian Kunkel, Eugen Betke), Salt Lake City, Utah, USA, SC16, 2016-11-15
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• Modeling and Simulation of Tape Libraries for Hierarchical Storage Systems (Jakob Lüttgau, Julian Kunkel), Salt Lake City, Utah, USA, SC16, 2016-11-15
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• Interaktiver C Kurs (ICP) (Julian Kunkel, Thomas Ludwig, Jakob Lüttgau, Dion Timmermann, Christian Kautz, Volker Skwarek), Hamburg, Campus Innovation 2015, 2015-11-27
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• Using Machine Learning to Predict the Performance of Non-Contiguous I/O (Julian Kunkel, Michaela Zimmer, Eugen Betke), Frankfurt, Germany, 2015-07-13
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• Advanced Data Sieving for Non-Contigouous I/O (Enno Zickler, Julian Kunkel), Frankfurt, Germany, 2015-07-13
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• SIOX: An Infrastructure for Monitoring and Optimization of HPC-I/O (Julian Kunkel, Michaela Zimmer, Marc Wiedemann, Nathanael Hübbe, Alvaro Aguilera, Holger Mickler, Xuan Wang, Andrij Chut, Thomas Bönisch), ISC'14 Leipzig, 2014-06-23
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• Source-to-Source Translation for Climate Models (Raul Torres, Leonidas Lindarkis, Julian Kunkel), Leipzig, Germany, International Supercomputing Conference 2013, 2013-06-17
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• Benchmarking Application I/O in the Community (Julian Kunkel, Olga Mordvinova, Dennis Runz, Michael Kuhn, Thomas Ludwig), Hamburg, Germany, International Supercomputing Conference, 2010-06-01
  Publication details – URL – Abstract – Publication

• Simulation of Cluster Power Consumption and Energy-to-Solution (Timo Minartz, Julian Kunkel, Thomas Ludwig), Passau, Germany, International Conference on Energy-Efficient Computing and Networking, 2010-04-14
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• Data Storage and Processing for High Throughput RNAi Screening (Julian Kunkel, Thomas Ludwig, M. Hemberger, G. Torralba, E. Schmitt, M. Hausmann, V. Lindenstruth, N. Brown, R. Schneider), Heidelberg, Germany, German Symposium on Systems Biology 2009, 2009
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• Exploiting Weather and Climate Data at Scale (WP4) (Julian Kunkel), ESiWACE General Assembly, Berlin, Germany, 2017-12-12 Presentation
• The Virtual Institute for I/O and the IO-500 (Julian Kunkel), BoF: The Virtual Institute for I/O and the IO-500, Denver, USA, 2017-11-15 Presentation
• Establishing the IO-500 Benchmark (Julian Kunkel), PDSW/DISC Workshop WiP session, Denver, USA, 2017-11-13 Presentation
• Towards new storage interfaces – chance or curse? (Julian Kunkel), Workshop: Exascale I/O for Unstructured Grids, DKRZ, Hamburg, Germany, 2017-09-26 Presentation
• Empowering Scientists with Domain Specific Languages (Julian Kunkel), SciCADE 2017, Bath, UK, 2017-09-13 Presentation
• IO-500 Status (Julian Kunkel), Data Benchmarking Workshop, LBNL, USA, 2017-06-25 Presentation
• Metadata Issues (Julian Kunkel), Data Benchmarking Workshop, LBNL, USA, 2017-06-25 Presentation
• MPI-IO In-Memory Storage with the Kove XPD (Julian Kunkel), Workshop on Performance and Scalability of Storage Systems (WOPSSS), Frankfurt, Germany, 2017-06-22 Presentation
• Lustre at DKRZ (Julian Kunkel), ISC HPC, BoF: EOFS, Frankfurt, Germany, 2017-06-21 Presentation
• Fortrantestgenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Julian Kunkel), ISC HPC, Poster session, Frankfurt, Germany, 2017-06-20 Presentation
• Decoupling the Selection of Compression Algorithms from Required Precision with the Scientific Compression Library (SCIL) (Julian Kunkel), ISC HPC, Poster session, Frankfurt, Germany, 2017-06-20 Presentation
• BoF: The Virtual Institute for I/O and the IO-500 (Julian Kunkel), ISC HPC, Frankfurt, Germany, 2017-06-20 Presentation
• Research Achievements and Perspectives for HPC and Earth Science (Julian Kunkel), , Reading, UK, 2017-06-14 Presentation
• Big Data Analytics (Julian Kunkel), DKRZ Tour “Computational Sciences in Engineering”, Hamburg, Germany, 2017-06-08 Presentation
• Analysis of Input/Output Phenomena using Statistics and Machine Learning (Julian Kunkel), , HAW, Hamburg, 2017-05-31 Presentation
• Visual Analytics (Julian Kunkel), , HAW, Hamburg, 2017-05-31 Presentation
• Metadata/Small File Benchmarking and Status of the IO-500 (Julian Kunkel), Workshop on Understanding I/O Performance Behavior (UIOP), DKRZ, Hamburg, Germany, 2017-03-22 Presentation
• Advanced Computation and I/O Methods for Earth-System Simulations Status update (Julian Kunkel), SPPEXA Annual Plenary Meeting, Leibniz Supercomputing Centre, Munich, Germany, 2017-03-21 Presentation
• AIMES: Status of the Project (Julian Kunkel), AIMES Face-to-face Meeting, Leibniz Supercomputing Centre, Munich, Germany, 2017-03-20 Presentation
• AIMES Status Report: University of Hamburg (Julian Kunkel, Nabeeh Jumah, Anastasiia Novikova), AIMES Face-to-face Meeting, Leibniz Supercomputing Centre, Munich, Germany, 2017-03-20 Presentation

• BoF: The Virtual Institute for I/O and the IO-500 (Julian Kunkel), Supercomputing Conference, Salt Lake City, USA, 2016-11-17 Presentation
• Statistical File Characterization and Status Update: Monitoring at DKRZ (Julian Kunkel), BoF: Analyzing Parallel I/O, Supercomputing Conference, Salt Lake City, USA, 2016-11-17 Presentation
• Middleware for Earth System Data (Julian Kunkel), PDSW-DISC Workshop, Salt Lake City, USA, 2016-11-14 Presentation
• MPI-IO In-Memory Storage with the Kove XPD (Julian Kunkel), PDSW-DISC Workshop, Salt Lake City, USA, 2016-11-14 Presentation
• Performance Conscious HPC (PeCoH) Kickoff (Julian Kunkel), PeCoH Kickoff, Hamburg, Germany, 2016-08-22 Presentation
• Additional I/O Considerations (Julian Kunkel), Bull cooperation meeting, Grenoble, France, 2016-07-04 Presentation
• Analyzing Data Properties Using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), HPC-IODC Workshop, Frankfurt, Germany, 2016-06-23 Presentation
• Lustre at DKRZ (Julian Kunkel), Lustre BoF, ISC High Performance, Frankfurt, Germany, 2016-06-21 Presentation
• Analyzing Data Properties Using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), ISC High Performance, Frankfurt, Germany, 2016-06-21 Presentation
• I/O Benchmarking (Julian Kunkel), JAMSTEC cooperation, Hamburg, Germany, 2016-06-17 Presentation
• BoF: VI4IO: The I/O Community Hosting the High-Performance Storage List (Julian Kunkel), ISC High Performance, Frankfurt, Germany, 2016-06-15 Presentation
• I/O Perspectives for Earth Science Data (Julian Kunkel), MPI-M/DKRZ joint I/O workshop, Hamburg, Germany, 2016-05-11 Presentation
• Advanced Computation and I/O Methods for Earth-System Simulations (AIMES) (Julian Kunkel), SPPEXA annual symposium, Munich, Germany, 2016-01-27 Presentation
• AIMES overview, contributions of WR to WPs (Julian Kunkel), AIMES kickoff meeting, Munich, Germany, 2016-01-27 Presentation
• Compression (in HDF5) in the projects ICOMEX and AIMES (Julian Kunkel), Informal meeting, Hamburg, Germany, 2016-01-18 Presentation

• WP2: Efficient input/output of very large data sets (Julian Kunkel), Bull Cooperation Kickoff, Germany, 2015-12-02
• Interaktiver C Kurs (ICP) (Julian Kunkel), Campus Innovation, Hamburg, Germany, 2015-11-27
• SIOX: A flexible approach (Julian Kunkel), BoF: Analyzing Parallel I/O, Supercomputing Conference, Austin, USA, 2015-11-20 Presentation
• Monitoring plans at DKRZ (Julian Kunkel), BoF: Analyzing Parallel I/O, Supercomputing Conference, Austin, USA, 2015-11-20 Presentation
• Future CS Trends and IO (Julian Kunkel), Max-Planck-Institute for Meteorology Retreat, Germany, 2015-11-04
• High-Performance I/O at Mistral (Julian Kunkel), DKRZ user workshop, Hamburg, Germany, 2015-10-06 Presentation
• Mistral Supercomputer I/O (Julian Kunkel), CluStor Workshop, Hamburg, Germany, 2015-07-30 Presentation
• Analyzing and Assessing I/O Performance (Julian Kunkel), CluStor Workshop, Hamburg, Germany, 2015-07-30 Presentation
• Predicting Performance of Non-Contiguous I/O with Machine Learning (Julian Kunkel), International Supercomputing Conference, Frankfurt, Germany, 2015-07-16 Presentation
• I/O at the German Climate Computing Center (Julian Kunkel), International Supercomputing Conference, Frankfurt, Germany, 2015-07-16 Presentation
• Advanced Computation and I/O Methods for Earth-System Simulations (AIMES) (Julian Kunkel), SPPEXA applicant colloquium, Bonn, Germany, 2015-05-05 Presentation
• Domain-specific Language Development (Julian Kunkel), Group seminar, University of Hamburg, Hamburg, Germany, 2015-02-23 Presentation

• Challenges in HPC I/O (Julian Kunkel), University of Basel, Basel, Switzerland, 2014-10-10 Presentation
• Monitoring Energy Consumption With SIOX – Autonomous Monitoring Triggered by Abnormal Energy Consumption (Julian Kunkel), Energy-Aware High Performance Computing Conference, Dresden, Germany, 2014-09-02 Presentation
• The SIOX Architecture – Coupling Automatic Monitoring and Optimization of Parallel I/O (Julian Kunkel), International Supercomputing Conference, Leipzig, 2014-06-26 Presentation
• Deficiencies in I/O and the Future with E10 (Julian Kunkel), EOFS breakfast meeting, International Supercomputing Conference, Leipzig, Germany, 2014-06-25 Presentation
• Exascale 10 – High-Level Architecture (Julian Kunkel), BoF: Towards Exascale I/O with E10, International Supercomputing Conference, Leipzig, Germany, 2014-06-25 Presentation
• Introductions to the SIOX Architecture (Julian Kunkel), BoF: Autonomic I/O Optimization, International Supercomputing Conference, Leipzig, Germany, 2014-06-23 Presentation
• Exascale 10 – High-Level Architecture (Julian Kunkel), CluStor I/O Workshop, Hamburg, Germany, 2014-06-19 Presentation
• Advancing Independent Non-Contiguous I/O (Julian Kunkel), CluStor I/O Workshop, Hamburg, Germany, 2014-06-19 Presentation
• Hochleistungsrechnen: Einblicke in Leistungsanalyse und Speichersysteme der Zukunft (Julian Kunkel), Ernst-Moritz-Arndt-Universität Greifswald, Greifswald, Germany, 2014-05-30 Presentation
• I/O Interfaces Will Change – Chance or Curse for Programmers? (Julian Kunkel), ICOMEX project meeting, Offenbach, Germany, 2014-05-15 Presentation
• ICOMEX (Julian Kunkel), G8 Initiative – Final Review Meeting, Princeton, USA, 2014-05-12 Presentation
• Challenges in Understanding, Optimizing and Procuring Storage Systems (Julian Kunkel), CSCS Storage Workshop, Lugano, Switzerland, 2014-05-09 Presentation
• Lessions learned from G8 ICOMEX: ICOsahedral-grid Models for Exascale Earth System Simulations (Julian Kunkel), ENES Workshop on Exascale Technologies and Innovation in HPC for Climate Models, Hamburg, Germany, 2014-04-06 Presentation
• Monitoring, Simulation and Autonomous Optimization of Parallel I/O (Julian Kunkel), Zentrum für Datenverarbeitung, Johannes Gutenberg Universität, Mainz, Germany, 2014-02-12

• Guiding Parallel I/O – The Semantical Gap (Julian Kunkel), ZKI-Tagung AK Supercomputing, Darmstadt, Germany, 2013-10-10 Presentation
• Monitoring and Optimization of I/O-Performance with SIOX (Julian Kunkel), HPC-Status-Konferenz der Gauß-Allianz, Dresden, Germany, 2013-09-05 Presentation
• Using Simulation to Validate Performance of MPI(-IO) Implementations (Julian Kunkel), International Supercomputing Conference, Leipzig, Germany, 2013-05-20 Presentation
• Towards Intelligent Self-Optimisation in HPC I/O (Julian Kunkel), Exascale10/EIOW satellite event, International Supercomputing Conference, Leipzig, Germany, 2013-05-20 Presentation
• Ganzheitliches Verständnis von Nutzungs- und Systemverhalten als Zugang zu effizienterem Hochleistungsrechnen (Julian Kunkel), Paderborn Center for Parallel Computing, Paderborn, 2013-05-05 Presentation

• EXIOS – Unified Exascale I/O System (Julian Kunkel), SPPEXA applicant colloquium, Bonn, Germany, 2012-07-09 Presentation
• Simulating Parallel Programs on Application and System Level (Julian Kunkel), International Supercomputing Conference, Hamburg, Germany, 2012-06-18 Presentation
• Towards a Unified Exascale I/O System (Julian Kunkel), IS-ENES I/O Workshop, Hamburg, Germany, 2012-02-28 Presentation
• WiP: Simulating Application and System Interaction with PIOsimHD (Julian Kunkel), PDP 2012, Munich, Germany, 2012-02-17 Presentation
• Modeling the I/O Path with a Functional Representation of Parallel File System and Hardware Architecture (Julian Kunkel), PDP 2012, Munich, Germany, 2012-02-16 Presentation

• Towards an Energy-Aware Scientific I/O Interface (Julian Kunkel), EnA-HPC 2011, Hamburg, Germany, 2011-09-08 Presentation
• Visualization of MPI(-IO) Datatypes (Julian Kunkel), ParCo 2011, Ghent, Belgium, 2011-08-30 Presentation

• Collecting Energy Consumption of Scientific Data (Julian Kunkel), International Conference on Energy-Aware High Performance Computing, Hamburg, Deutschland, 2010-09-17 Presentation
• Ansätze zum Monitoring hierarchischer E/A-Systeme (Julian Kunkel), ZKI-Arbeitskreis Supercomputing, Hamburg, Germany, 2010-03-04 Presentation

• Tracing Internal Communication in MPI and MPI-I/O (Julian Kunkel), PDCAT 2009, Hiroshima, Japan, 2009-12-09 Presentation

• Bottleneck Detection in Parallel File Systems with Trace-Based Performance Monitoring (Julian Kunkel), Euro-Par 2008, Gran Canaria, Spain, 2008-08-29 Presentation

• Performance Evaluation of the PVFS2 Architecture (Julian Kunkel), Euromicro Conference on Parallel, Distributed and Network-based Processing, Naples, Italy, 2007-02-08 Presentation

• Performance Analysis of Parallel File Systems (Julian Kunkel), CluStor 2006, Heidelberg, Germany, 2006-09-21
• Migration and Load Balancing Within PVFS2 (Julian Kunkel), CluStor 2006, Heidelberg, Germany, 2006-09-21

• Vector Folding for Icosahedral Earth System Models (Jonas Tietz), Bachelor's Thesis, Advisors: Nabeeh Jumah, Julian Kunkel, 2018-03-26, Thesis – Publication details
• Enabling Single Process Testing of MPI in Massive Parallel Applications (Tareq Kellyeh), Master's Thesis, Advisors: Julian Kunkel, Christian Hovy, 2018-03-20, Thesis – Publication details
• Modeling and Performance Prediction of HDF5 data on Objectstorage (Roman Jerger), Master's Thesis, Advisors: Julian Kunkel, Jakob Lüttgau, 2018-03-15, Thesis – Publication details

• Verarbeitung von Klimadaten mit Big-Data-Werkzeugen (Alexander Erhardt), Master's Thesis, Advisors: Julian Kunkel, 2017-07-31, Thesis – Publication details
• Interactive Recommender Systems For A Professional Social Network (Mirko Köster), Master's Thesis, Advisors: Julian Kunkel, 2017-06-09, Thesis – Publication details
• In-situ Transformation for Input/Output Access Patterns by Applying Building Blocks of Optimization Schemas (Daniel Schmidtke), Master's Thesis, Advisors: Julian Kunkel, 2017-04-19, Thesis – Publication details
• Extracting Semantic Relations from Wikipedia using Spark (Hans Ole Hatzel), Bachelor's Thesis, Advisors: Julian Kunkel, 2017-02-02, Thesis – Publication details

• Adaptive Selection of Lossy Compression Algorithms Using Machine Learning (Armin Schaare), Bachelor's Thesis, Advisors: Julian Kunkel, Anastasiia Novikova, 2016-11-29, Thesis – Publication details
• Evaluation von alternativen Speicherszenarien für hierarchische Speichersysteme (Marc Perzborn), Bachelor's Thesis, Advisors: Julian Kunkel, 2016-10-31, Thesis – Publication details
• Quality Control of Meteorological Time-Series with the Aid of Data Mining (Jennifer Truong), Master's Thesis, Advisors: Julian Kunkel, 2016-10-30, Thesis – Publication details
• Characterizing Literature Using Machine Learning Methods (Jan Bilek), Master's Thesis, Advisors: Julian Kunkel, 2016-10-14, Thesis – Publication details
• Untersuchung von Interaktiven Analyse- und Visualisierungsumgebungen im Browser für NetCDF-Daten (Sebastian Rothe), Master's Thesis, Advisors: Julian Kunkel, 2016-07-21, Thesis – Publication details
• Automation of manual code optimization via DSL-directed AST-manipulation (Jonas Gresens), Bachelor's Thesis, Advisors: Julian Kunkel, 2016-06-27, Thesis – Publication details
• Modeling and Simulation of Tape Libraries for Hierarchical Storage Management Systems (Jakob Lüttgau), Master's Thesis, Advisors: Julian Kunkel, 2016-04-09, Thesis – Presentation – Publication details

• Vorhersage von E/A-Leistung im Hochleistungsrechnen unter der Verwendung von neuronalen Netzen (Jan Fabian Schmid), Bachelor's Thesis, Advisors: Julian Kunkel, 2015-12-17, Thesis – Presentation – Publication details
• Automatisches Lernen der Leistungscharakteristika von Paralleler Ein-/Ausgabe (Eugen Betke), Master's Thesis, Advisors: Julian Kunkel, 2015-06-27, Thesis – Presentation – Publication details
• Optimization of non-contiguous MPI-I/O Operations (Enno David Zickler), Bachelor's Thesis, Advisors: Julian Kunkel, 2015-01-29, Thesis – Presentation – Publication details

• Halbautomatische Überprüfung von kollektiven MPI-Operationen zur Identifikation von Leistungsinkonsistenzen (Sebastian Rothe), Bachelor's Thesis, Advisors: Julian Kunkel, 2014-04-09, Publication details
• Analyse und Optimierung von nicht-zusammenhängende Ein-/Ausgabe in MPI (Daniel Schmidtke), Bachelor's Thesis, Advisors: Julian Kunkel, Michaela Zimmer, 2014-04-07, Thesis – Publication details
• Automatic Analysis of a Supercomputer's Topology and Performance Characteristics (Alexander Bufe), Bachelor's Thesis, Advisors: Julian Kunkel, 2014-03-18, Thesis – Publication details
• Flexible Event Imitation Engine for Parallel Workloads (Jakob Lüttgau), Bachelor's Thesis, Advisors: Julian Kunkel, 2014-03-18, Thesis – Publication details

• Effiziente Verarbeitung von Klimadaten mit ParStream (Moritz Lahn), Bachelor's Thesis, Advisors: Julian Kunkel, 2012-06-28, Publication details
• Replay Engine for Application Specific Workloads (Jörn Ahlers), Bachelor's Thesis, Advisors: Julian Kunkel, 2012-04-12, Thesis – Publication details

• Crossmedia File System MetaFS – Exploiting Performance Characteristics from Flash Storage and HDD (Leszek Kattinger), Bachelor's Thesis, Advisors: Julian Kunkel, Olga Mordvinova, 2010-03-23, Thesis – Publication details – Sources

• Tracing Internal Behavior in PVFS (Tien Duc Tien), Bachelor's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2009-10-05, Thesis – Publication details
• Simulation-Aided Performance Evaluation of Input/Output Optimizations for Distributed Systems (Michael Kuhn), Master's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2009-09-30, Thesis – Publication details – URL
• Design and Implementation of a Profiling Environment for Trace Based Analysis of Energy Efficiency Benchmarks in High Performance Computing (Stephan Krempel), Master's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2009-08-31, Thesis – Publication details
• Model and simulation of power consumption and power saving potential of energy efficient cluster hardware (Timo Minartz), Master's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2009-08-27, Thesis – Publication details – URL

• Ergebnisvisualisierung paralleler Ein/Ausgabe Simulation im Hochleistungsrechnen (Anton Ruff), Bachelor's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2008-05-31, Publication details

• Container-Archiv-Format für wahlfreien effizienten Zugriff auf Dateien (Hendrik Heinrich), Bachelor's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2007-09-30, Thesis – Publication details
• Directory-Based Metadata Optimizations for Small Files in PVFS (Michael Kuhn), Bachelor's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2007-09-03, Thesis – Publication details – URL
• Benchmarking of Non-Blocking Input/Output on Compute Clusters (David Büttner), Bachelor's Thesis, Advisors: Thomas Ludwig, Julian Kunkel, 2007-04-24, Thesis – Publication details – URL

• Vorlesung „Big Data Analytics“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Big Data“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Seminar „Neueste Trends in Big Data Analytics“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Christian Hovy)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt mit Seminar „Paralleles Rechnen für Fortgeschrittene“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Proseminar „Neueste Trends im Hochleistungsrechnen“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Vorlesung „Big Data Analytics“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Christian Hovy)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Proseminar „Programmierung in R“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Seminar „Speicher- und Dateisysteme“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt mit Seminar „Paralleles Rechnen für Fortgeschrittene“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Vorlesung „Big Data Analytics“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Seminar „Neueste Trends im Hochleistungsrechnen“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt mit Seminar „Paralleles Programmieren“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Proseminar „Speicher- und Dateisysteme“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Hermann Lenhart)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Seminar „Energy-Efficient Programming“ (Ansprechpartner: Dr. Manuel Dolz)
• Praktikum „Kernel Programming“ (Ansprechpartner: Konstantinos Chasapis)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Proseminar „Werkzeuge für das wissenschaftliche Arbeiten“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Hermann Lenhart)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Effiziente Programmierung in C“ (Ansprechpartner: Nathanael Hübbe)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Hermann Lenhart)
• Proseminar „Ein-/Ausgabe - Stand der Wissenschaft“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Proseminar „Architekturen von Hochleistungsrechnern“ (Ansprechpartner: Nathanael Hübbe)
• Seminar „Modellierung und Simulation“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Seminar „Effiziente Programmierung in C“ (Ansprechpartner: Nathanael Hübbe)
• Praktikum „Aufbau eines (heterogenen) Clusters“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt mit Seminar „Paralleles Programmieren“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Workshop „Programmierung mit C“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Hermann Lenhart)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Vorlesung „Hochleistungsrechnen“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Seminar „Leistungsanalyse unter Linux“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Workshop „Programmierung mit C“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Workshop „Versionsverwaltung mit Git“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Workshop „Programmierung mit C“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Praktikum „Betriebssystemnahe C-Programmierung“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt mit Seminar „Paralleles Programmieren“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Proseminar „C-Programmierung - Grundlagen und Konzepte“ (Ansprechpartner: Dr. Timo Minartz)

• Vorlesung „Hochleistungsrechnen“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Projekt „Parallelrechnerevaluation“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Seminar „Softwareentwicklung in der Wissenschaft“ (Ansprechpartner: Dr. Hermann Lenhart)
• Workshop „Programmierung mit C“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Workshop „Versionsverwaltung mit Git“ (Ansprechpartner: Prof. Dr. Michael Kuhn)

• Vorlesung „Hochleistungsrechnen“ (Ansprechpartner: Prof. Dr. Michael Kuhn)
• Praktikum „Parallele Programmierung“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Seminar „Systemmonitoring unter Linux“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Android: Plattform für mobile Geräte“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Paralleles Rechnen auf Grafikkarten“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Speichermedien“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Proseminar „Linux für Umsteiger“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Praktikum „Dateisysteme“ (Ansprechpartner: Prof. Dr. Julian Kunkel)
• Praktikum „Werkzeuge in Clusterumgebungen“ (Ansprechpartner: Prof. Dr. Julian Kunkel)

• Seminar „Fortgeschrittene Fragestellungen zu parallelen und verteilten Dateisystemen“ (Ansprechpartner: Prof. Dr. Julian Kunkel)