Dr. Julian Kunkel

Dr. Kunkel is a Lecturer at the Computer Science Department at the University of Reading. Previously, he worked as postdoc in the research department of the German Climate Computing Center (DKRZ) that partners with the Scientific Computing group at the Universität Hamburg.
He manages several research projects revolving around High-Performance Computing and particularly high-performance storage. Julian became interested in the topic of HPC storage in 2003, during his studies of computer science. 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. Dr. Kunkel is a member of many international program committees. He is committed to excellence in research and teaching.

• Parallel file systems
• Application of machine learning methods
• Performance portability
• Data reduction techniques
• Management of cluster systems
• Performance analysis of parallel applications and parallel I/O
• Software engineering of scientific software
• Personalized teaching

• ESiWACE2
• Advanced Storage Monitoring
• AIMES
• PeCoH
• Bull I/O Cooperation
• ESiWACE
• ICOMEX
• SIOX

• 2019, Chair of the steering committee, HPC Certification Forum
• 2019, Member of the OSSG Committee, BCS Open Source Specialist Group
• 2019, IO-500 steering committee, The Virtual Institute for IO
• 2019, Student travel grant committee member, ISC High Performance
• 2019, Steering committee member, ISC High Performance
• 2018, Chair of the steering committee, HPC Certification Forum
• 2018, Member of the OSSG Committee, BCS Open Source Specialist Group
• 2018, IO-500 steering committee, The Virtual Institute for IO
• 2018, Student travel grant committee member, ISC High Performance
• 2018, Project poster chair, ISC High Performance
• 2018, Advisory board member, International European Conference on Parallel and Distributed Computing (Europar)
• 2018, Steering committee member, ISC High Performance
• 2017, IO-500 steering committee,
• 2017, Research publication chair, ISC High Performance
• 2017, Track chair, Conference on Algorithms and Architectures for Parallel Processing (ICA3PP-2017), Software Systems and Programming Models track
• 2017, Steering committee member, ISC High Performance
• 2017, Project poster chair, ISC High Performance
• 2017, Advisory board member, International European Conference on Parallel and Distributed Computing (Europar)
• 2016, Research publication chair, ISC High Performance
• 2016, Project proposal reviewer, Exascale Computing Project, Department of Energy
• 2016, Steering committee member, ISC High Performance
• 2016, Steering committee member, Exascale 10 initiative (EIOW, an EOFS workgroup)
• 2015, Project proposal reviewer, Funding Opportunity Announcement, Storage Systems and Input/Output for Extreme Scale Science (DE-FOA-0001338), Department of Energy
• 2015, Project proposal reviewer, Anwendungsorientierte HPC-Software für das Hoch- und Höchstleistungsrechnen in Wissenschaft und Wirtschaft, BMBF
• 2015, Steering committee member, ISC High Performance
• 2015, Co-chair for the research paper sessions, ISC High Performance
• 2015, Research poster chair, ISC High Performance
• 2015, Steering committee member, Exascale 10 initiative (EIOW, an EOFS workgroup)
• 2014, Co-chair for the research paper sessions, International Supercomputing Conference (ISC)
• 2014, Research poster chair, International Supercomputing Conference (ISC)
• 2014, Steering committee member, Exascale 10 initiative (EIOW, an EOFS workgroup)
• 2013, Co-chair for the research paper sessions, International Supercomputing Conference (ISC)
• 2013, Steering committee member, Exascale 10 initiative (EIOW, an EOFS workgroup)
• 2012, Co-chair for the research paper sessions, International Supercomputing Conference (ISC)
• 2012, Steering committee member, Exascale 10 initiative (EIOW, an EOFS workgroup)
• 2011, Co-chair for the research paper sessions, International Supercomputing Conference (ISC)
• 2010, Co-chair for the research paper sessions, International Supercomputing Conference (ISC)

• 2017, High Performance Computing; ISC High Performance 2017 International Workshops, DRBSD, ExaComm, HCPM, HPC-IODC, IWOPH, IXPUG, P3MA, VHPC, Visualization at Scale, WOPSSS, Frankfurt, Germany, June 18-22, Revised Selected Papers; Julian Kunkel, Rio Yokota, Pavan Balaji, David Keyes; LNCS; vol 10524; Springer; ISBN: 978-3-319-67630-2; DOI
• 2017, High Performance Computing; 32nd International Conference, ISC High Performance 2017, Frankfurt, Germany, June 18–22, 2017, Proceedings; Julian Kunkel, Rio Yokota, Pavan Balaji, David Keyes; LNCS; vol 10266; Springer; ISBN: 978-3-319-58667-0; DOI
• 2016, High Performance Computing; ISC High Performance 2016 International Workshops, ExaComm, E-MuCoCoS, HPC-IODC, IXPUG, IWOPH, P^3MA, VHPC, WOPSSS, Frankfurt, Germany, June 19–23, 2016, Revised Selected Papers; Michaela Taufer, Bernd Mohr, Julian Kunkel; LNCS; vol 9945; Springer; ISBN: 978-3-319-46079-6; DOI
• 2016, High Performance Computing; 31th International Conference, ISC High Performance 2016, Frankfurt, Germany, June 19-23; Julian Kunkel, Pavan Balaji, Jack Dongarra; LNCS; vol 9697; Springer; ISBN: 978-3-319-41321-1; DOI
• 2015, High Performance Computing; 30th International Conference, ISC High Performance 2015, Frankfurt, Germany, July 12-16; Julian Kunkel, Thomas Ludwig; LNCS; vol 9137; Springer; ISBN: 978-3-319-20119-1; DOI
• 2014, Supercomputing; 29th International Conference, ISC 2014, Leipzig, Germany, June 22-26, 2014. Proceedings; Julian Kunkel, Thomas Ludwig, Hans Meuer; LNCS; vol 8488; Springer; ISBN: 978-3-319-07518-1; DOI
• 2013, Supercomputing; 28th International Supercomputing Conference, ISC 2013, Leipzig, Germany, June 16-20, 2013. Proceedings; Julian Kunkel, Thomas Ludwig, Hans Meuer; LNCS; vol 7905; Springer; ISBN: 978-3-642-38750-0; DOI
• 2012-05-23, ISC’12 research paper sessions proceedings; Julian Kunkel, Thomas Ludwig, Hans Meuer; Computer Science - Research and Development; vol 28; Springer; DOI
• 2011-04-15, ISC’11 research paper sessions proceedings; Julian Kunkel, Thomas Ludwig, Hans Meuer; Computer Science - Research and Development; vol 26; Springer; DOI

• 2019, The Workshop on Performance and Scalability of Storage Systems (WOPSSS 2019), ISC High Performance
• 2019, Project Poster Session, ISC High Performance
• 2018, Conference on Algorithms and Architectures for Parallel Processing (ICA3PP)
• 2018, HPDC PhD Forum Poster committee
• 2018, The Workshop on Performance and Scalability of Storage Systems (WOPSSS 2018), ISC High Performance
• 2018, Research Poster Session, ISC High Performance
• 2018, International Workshop on Infrastructure for Workflows and Application Composition
• 2018, Supercomputing Frontiers Europe
• 2017, International Symposium on Cluster, Cloud and Grid Computing (CCGRID 2017), Storage and I/O track
• 2017, Research Poster Session, ISC High Performance
• 2017, Big Data track, International Conference on Cloud Computing Technology and Science (IEEE CloudCom)
• 2017, International European Conference on Parallel and Distributed Computing (Euro-Par 2017), Parallel and Distributed Data Management and Analytics track
• 2017, The Workshop on Performance and Scalability of Storage Systems (WOPSSS 2017), ISC High Performance
• 2016, Joint International Workshop On Parallel Data Storage and Data Intensive Scalable Computing Systems (PDSW-DISCS16)
• 2016, Data, Storage, and Visualization track, IEEE Cluster 2016
• 2016, IEEE CloudCom 2016, Big Data track
• 2016, International Symposium on Cluster, Cloud and Grid Computing, Storage and I/O track, CCGRID 2016
• 2016, Research Paper Session, ISC High Performance
• 2016, Research Poster Session, ISC High Performance
• 2016, Birds-of-a-feather Session, ISC High Performance
• 2016, International Conference for High Performance Computing, Networking, Storage and Analysis (SC) – Subreviewer for two papers
• 2015, Parallel Data Storage Workshop, PDSW 2015
• 2015, International Symposium on Cluster, Cloud and Grid Computing, CCGRID 2015, Storage and I/O track
• 2015, Research Paper Session, ISC High Performance
• 2015, Workshop on Data Intensive Computing (WoDIC), PARCO 2015
• 2015, European Message Passing Interface Conference (EuroMPI)
• 2015, International Conference on Cloud Computing Technology and Science (IEEE CloudCom), Big Data track
• 2014, International Symposium on Cluster, Cloud and Grid Computing (IEEE CCGrid), Storage and I/O track
• 2014, Workshop on Interfaces and Architectures for Scientific Data Storage (IASDS)
• 2014, International Conference on Cloud Computing Technology and Science (IEEE CloudCom), Big Data track
• 2014, European Message Passing Interface Conference (EuroMPI)
• 2014, Research Paper Session, International Supercomputing Conference (ISC)
• 2013, European Message Passing Interface Conference (EuroMPI)
• 2013, Research Paper Session, International Supercomputing Conference (ISC)
• 2012, Research Paper Session, International Supercomputing Conference (ISC)
• 2011, International Conference on Green Computing and Communications (GreenCom)
• 2011, International Conference on Green Computing (ICGREEN)
• 2011, Research Paper Session, International Supercomputing Conference (ISC)
• 2010, International Conference on Green Computing (ICGREEN)
• 2010, Research Paper Session, International Supercomputing Conference (ISC)
• 2009, Research Paper Session, International Supercomputing Conference (ISC)

• 2019, MDPI Journal Future Internet
• 2018, International Journal of Systems Science
• 2018, MDPI Journal Sensors
• 2018, IEEE Letters of the Computer Society
• 2018, MDPI Journal Future Internet
• 2017, Journal of Computer Science and Technology (JCST)
• 2017, Elsevier Journal of Future Generation Computer Systems
• 2017, ACM Journal of Computing Surveys
• 2017, Journal Software: Practice and Experience
• 2016, Journal Symmetry (MDPI – Open Access Publishing)
• 2016, Journal of Computer Science and Technology (JCST)
• 2016, Journal Transactions on Storage
• 2016, Journal Future Generation Computer Systems
• 2016, International Journal of High Performance Computing Application (IJHPCA)
• 2015, Journal of Computer Science and Technology (JCST)
• 2014, International Journal of High Performance Computing Application (IJHPCA)

• 2019, Organizer, Workshop on OpenSource AI
• 2019, Organizer, Workshop on Storage Challenges in the UK
• 2019, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
• 2018, Organizer, Workshop: SIG-IO-UK June
• 2018, Organizer, Workshop: SIG-IO-UK September
• 2018, Organizer, BoF: Analyzing Parallel I/O. Supercomputing Conference
• 2018, Organizer, BoF: International HPC Certification Program. Supercomputing Conference
• 2018, Organizer, BoF: The IO-500 and the Virtual Institute of I/O. Supercomputing Conference
• 2018, Organizer, BoF: The IO-500 and the Virtual Institute of I/O. ISC High Performance
• 2018, Local Organizer, UKIPC contest
• 2018, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
• 2017, Organizer, Workshop: Exascale I/O for Unstructured Grids (EIUG). SPPEXA funded workshop
• 2017, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
• 2017, Organizer, Birds-of-a-Feather Session: The Virtual Institute for I/O and the IO-500. ISC High Performance
• 2017, Organizer, Workshop: Understanding I/O Performance Behavior (UIOP). SPPEXA funded workshop
• 2016, Organizer, Birds-of-a-Feather Session: The Virtual Institute for I/O and the IO-500. Supercomputing Conference
• 2016, Organizer, Birds-of-a-Feather Session: Analyzing Parallel I/O. Supercomputing Conference
• 2016, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
• 2016, Organizer, Birds-of-a-Feather Session: VI4IO: The I/O Community Hosting the High-Performance Storage List. ISC High Performance
• 2015, Organizer, Birds-of-a-Feather Session: Analyzing Parallel I/O. Supercomputing Conference
• 2015, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
• 2015, Organizer, Workshop on Cluster Storage Technology (CluStor). University of Hamburg
• 2014, Organizer, Workshop on Cluster Storage Technology (CluStor). University of Hamburg
• 2014, Organizer, Birds-of-a-Feather Session: Analyzing Parallel I/O. Supercomputing Conference
• 2014, Organizer, Birds-of-a-Feather Session: Towards Exascale I/O with E10. ISC
• 2014, Organizer, Birds-of-a-Feather Session: Autonomic I/O Optimization. ISC
• 2012, Guiding student teams, Intel’s Accelerate Your Code contest
• 2011, Guiding student teams, Intel’s Accelerate Your Code contest
• 2011, Lecturer, Two day MPI, OpenMP and parallel I/O crashcourse. (English) Heidelberg Institute for Theoretical Studies (HITS). Invited by Alexandros Stamatakis
• 2011, Local organization committee member, International Conference on Energy-Aware High Performance Computing (EnAHPC)
• 2010, Local organization committee member, International Conference on Energy-Aware High Performance Computing (EnAHPC)
• 2008, Local organization committee member, Workshop on Cluster Storage Technology (CluStor)
• 2007, Local organization committee member, Workshop on Cluster Storage Technology (CluStor)

• 2018–2019, Member of the procurement team for the HLRE4, Preparation of I/O-benchmarks and contributions to the procurement white paper, DKRZ, Germany
• 2018, Member of the benchmarking team for the procurement of Archer2, Preparation of I/O-benchmarks, UKRI, UK
• 2018–2019, Head of the Strategic Infrastructure Development team, Department of Computer Science, University of Reading
• 2018–2019, Establishment of a Computer Science Museum, Department of Computer Science, University of Reading
• 2016–2019, Web-page development, migration and maintenance, The European Open File System (EOFS), https://www.eofs.eu
• 2015, Founder, web-page development, The Virtual Institute for I/O, https://vi4io.eu
• 2015–2017, Member of the monitoring group, Development of the next-generation monitoring system for our new supercomputer, DKRZ
• 2013–2016, Web-page development and maintenance, Exascale 10 (E10), http://www.exascale10.com
• 2012–2015, Organization, Special Interest Group I/O in earth-system models. DKRZ
• 2012–2013, Member of the procurement team for the HLRE3, Visits of vendors/integrators, preparation of I/O-benchmarks and procurement white paper, DKRZ
• 2012, Member of the document management team, Goal: Aquisition of a DMS, DKRZ
• 2009–2017, Organization, Regular seminar for information exchange, DKRZ
• 2009–2013, Web-page development, structure and dynamic content with XML, Research Group: Scientific Computing, Universität Hamburg, http://www.wr.informatik.uni-hamburg.de/
• 2007–2009, Development, Interactive screening analysis platform with SQL. Bioquant, University of Heidelberg

• Vorlesung „Advanced Computing (CS3AC16)“
• Vorlesung „Programming (CS1PR16)“ (Contact: James Ferryman)

• Extracurricular Activity „Linux User Group“

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

• Praktikum „Parallele Programmierung“
• Projekt „Parallelrechnerevaluation“ (Contact: Michael Kuhn)
• Proseminar „Neueste Trends im Hochleistungsrechnen“ (Contact: Dr. Julian Kunkel)

• Vorlesung „Big Data Analytics“

• Seminar „Softwareentwicklung in der Wissenschaft“ (Contact: Christian Hovy)
• Praktikum „Parallele Programmierung“ (Contact: Dr. Julian Kunkel)
• Projekt „Parallelrechnerevaluation“ (Contact: Michael Kuhn)
• Proseminar „Programmierung in R“ (Contact: Dr. Julian Kunkel)
• Seminar „Speicher- und Dateisysteme“ (Contact: Michael Kuhn)

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

• Seminar „Softwareentwicklung in der Wissenschaft“ (Contact: Hermann Lenhart)
• Praktikum „Parallele Programmierung“
• Projekt „Parallelrechnerevaluation“ (Contact: Michael Kuhn)

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

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

• Seminar „Effiziente Programmierung in C“ (Contact: Nathanael Hübbe)
• Projekt „Parallelrechnerevaluation“ (Contact: Michael Kuhn)

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

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

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

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

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

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

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

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

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

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

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

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

• Simulation of Parallel Programs on Application and System Level, Julian Kunkel (PhD Thesis), Advisors: Thomas Ludwig, 2013-07-30, Thesis BibTeX 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 BibTeX URL
• Performance Analysis of the PVFS2 Persistency Layer, Julian Kunkel (Bachelor's Thesis), Advisors: Thomas Ludwig, 2006-02-15, Thesis BibTeX URL

• Cost and Performance Modeling for Earth System Data Management and Beyond (Jakob Lüttgau, Julian Kunkel), 2019-01-25 BibTeX DOI PDF
• Tools for Analyzing Parallel I/O (Julian Kunkel, Eugen Betke, Matt Bryson, Philip Carns, Rosemary Francis, Wolfgang Frings, Roland Laifer, Sandra Mendez), 2019-01-25 BibTeX DOI PDF
• Performance Portability of Earth System Models with User-Controlled GGDML code Translation (Nabeeh Jum'ah, Julian Kunkel), 2019-01-25 BibTeX DOI PDF
• Understanding Metadata Latency with MDWorkbench (Julian Kunkel, George S. Markomanolis), 2019-01-25 BibTeX DOI PDF
• Benefit of DDN's IME-Fuse and IME-Lustre File Systems for I/O Intensive HPC Applications (Eugen Betke, Julian Kunkel), 2019-01-25 BibTeX DOI PDF
• 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), 2019-01-11 BibTeX URL DOI
• Automatic Vectorization of Stencil Codes with the GGDML Language Extensions (Nabeeh Jum'ah, Julian Kunkel), 2019 BibTeX URL DOI

• A Similarity Study of I/O Traces via String Kernels (Raul Torres, Julian Kunkel, Manuel F. Dolz, Thomas Ludwig), 2018-07-03 BibTeX DOI
• Poster: 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), 2018-06-26 BibTeX URL PDF
• Poster: A user-controlled GGDML Code Translation Technique for Performance Portability of Earth System Models (Nabeeh Jumah, Julian Kunkel), 2018-06-26 BibTeX URL PDF
• Poster: The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent), 2018-06-26 BibTeX URL PDF
• Poster: International HPC Certification Program (Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, William Jalby, Lev Lafayette), 2018-06-26 BibTeX URL PDF
• Poster: 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), 2018-06-26 BibTeX URL PDF
• Poster: Automatic Profiling for Climate Modeling (Anja Gerbes, Nabeeh Jumah, Julian Kunkel), 2018-04-17 BibTeX URL PDF
• A Survey of Storage Systems for High-Performance Computing (Jakob Lüttgau, Michael Kuhn, Kira Duwe, Yevhen Alforov, Eugen Betke, Julian Kunkel, Thomas Ludwig), 2018-04 BibTeX URL DOI PDF
• Comparison of Clang Abstract Syntax Trees using String Kernels (Raul Torres, Julian Kunkel, Manuel F. Dolz, Thomas Ludwig), 2018 BibTeX
• Toward Understanding I/O Behavior in HPC Workflows (Jakob Lüttgau, Shane Snyder, Philip Carns, Justin M. Wozniak, Julian Kunkel, Thomas Ludwig), 2018 BibTeX
• Towards Green Scientific Data Compression Through High-Level I/O Interfaces (Yevhen Alforov, Anastasiia Novikova, Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2018 BibTeX

• Towards Decoupling the Selection of Compression Algorithms from Quality Constraints – an Investigation of Lossy Compression Efficiency (Julian Kunkel, Anastasiia Novikova, Eugen Betke), 2017-12 BibTeX URL DOI PDF
• Poster: Toward Decoupling the Selection of Compression Algorithms from Quality Constraints (Julian Kunkel, Anastasia Novikova, Eugen Betke), 2017-11-14 BibTeX PDF
• Poster: Adaptive Tier Selection for NetCDF and HDF5 (Jakob Lüttgau, Eugen Betke, Olga Perevalova, Julian Kunkel, Michael Kuhn), 2017-11-14 BibTeX PDF
• Understanding Hardware and Software Metrics with respect to Power Consumption (Julian Kunkel, Manuel F. Dolz), 2017-11-04 BibTeX URL DOI
• Poster: Icosahedral Modeling with GGDML (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), 2017-10-09 BibTeX PDF
• GGDML: Icosahedral Models Language Extensions (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), 2017-06-21 BibTeX URL DOI
• Poster: Towards Performance Portability for Atmospheric and Climate Models with the GGDML DSL (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), 2017-06-20 BibTeX URL
• Poster: FortranTestGenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Christian Hovy, Julian Kunkel), 2017-06-20 BibTeX PDF
• Poster: Enhanced Adaptive Compression in Lustre (Anna Fuchs, Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2017-06-20 BibTeX URL
• Poster: Performance Conscious HPC (PeCoH) (Julian Kunkel, Michael Kuhn, Thomas Ludwig, Matthias Riebisch, Stephan Olbrich, Hinnerk Stüben, Kai Himstedt, Hendryk Bockelmann, Markus Stammberger), 2017-06-20 BibTeX URL
• Poster: 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), 2017-06-20 BibTeX URL
• Poster: The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent), 2017-06-20 BibTeX PDF
• Wissenschaftliches Rechnen - Scientific Computing - 2016 (Yevhen Alforov, Eugen Betke, Konstantinos Chasapis, Anna Fuchs, Fabian Große, Nabeeh Jumah, Michael Kuhn, Julian Kunkel, Hermann Lenhart, Jakob Lüttgau, Philipp Neumann, Anastasiia Novikova, Jannek Squar, Thomas Ludwig), 2017-06-19 BibTeX PDF
• SFS: A Tool for Large Scale Analysis of Compression Characteristics (Julian Kunkel), 2017-05-05 BibTeX PDF
• Interaktiver C-Programmierkurs, ICP (Julian Kunkel, Jakob Lüttgau), 2017-04-10 BibTeX URL
• Poster: Intelligent Selection of Compiler Options to Optimize Compile Time and Performance (Anja Gerbes, Julian Kunkel, Nabeeh Jumah), 2017-03-27 BibTeX URL PDF
• A Novel String Representation and Kernel Function for the Comparison of I/O Access Patterns (Raul Torres, Julian Kunkel, Manuel Dolz, Thomas Ludwig), 2017 BibTeX DOI PDF
• An MPI-IO In-Memory Driver for Non-Volatile Pooled Memory of the Kove XPD (Julian Kunkel, Eugen Betke), 2017 BibTeX DOI PDF
• Toward Decoupling the Selection of Compression Algorithms from Quality Constraints (Julian Kunkel, Anastasiia Novikova, Eugen Betke, Armin Schaare), 2017 BibTeX DOI PDF
• Simulation of Hierarchical Storage Systems for TCO and QoS (Jakob Lüttgau, Julian Kunkel), 2017 BibTeX DOI PDF
• Real-Time I/O-Monitoring of HPC Applications with SIOX, Elasticsearch, Grafana and FUSE (Eugen Betke, Julian Kunkel), 2017 BibTeX DOI PDF

• Poster: Predicting I/O-performance in HPC using Artificial Neural Networks (Jan Fabian Schmid, Julian Kunkel), 2016-21-06 BibTeX PDF
• Poster: Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), 2016-21-06 – Awards: Best Poster BibTeX PDF
• Interaktiver C-Programmierkurs, ICP (Julian Kunkel, Jakob Lüttgau), 2016-11-16 BibTeX URL
• Poster: Modeling and Simulation of Tape Libraries for Hierarchical Storage Systems (Jakob Lüttgau, Julian Kunkel), 2016-11-15 BibTeX URL PDF
• Poster: Utilizing In-Memory Storage for MPI-IO (Julian Kunkel, Eugen Betke), 2016-11-15 BibTeX URL PDF
• Analyzing Data Properties using Statistical Sampling – Illustrated on Scientific File Formats (Julian Kunkel), 2016-10 BibTeX URL DOI
• Predicting I/O Performance in HPC Using Artificial Neural Networks (Jan Fabian Schmid, Julian Kunkel), 2016-10 BibTeX URL DOI
• Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), 2016-06 BibTeX DOI PDF
• Data Compression for Climate Data (Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2016-06 BibTeX URL DOI PDF
• Towards Automatic and Flexible Unit Test Generation for Legacy HPC Code (Christian Hovy, Julian Kunkel), 2016 BibTeX DOI

• Poster: Interaktiver C Kurs (ICP) (Julian Kunkel, Thomas Ludwig, Jakob Lüttgau, Dion Timmermann, Christian Kautz, Volker Skwarek), 2015-11-27 BibTeX URL
• Poster: Advanced Data Sieving for Non-Contigouous I/O (Enno Zickler, Julian Kunkel), 2015-07-13 BibTeX URL
• Poster: Using Machine Learning to Predict the Performance of Non-Contiguous I/O (Julian Kunkel, Michaela Zimmer, Eugen Betke), 2015-07-13 BibTeX URL
• Monitoring energy consumption with SIOX (Julian Kunkel, Alvaro Aguilera, Nathanael Hübbe, Marc Wiedemann, Michaela Zimmer), 2015-05 BibTeX URL DOI PDF
• Identifying Relevant Factors in the I/O-Path using Statistical Methods (Julian Kunkel), 2015-03-14 BibTeX PDF
• An analytical methodology to derive power models based on hardware and software metrics (Manuel F. Dolz, Julian Kunkel, Konstantinos Chasapis, Sandra Catalan), 2015 BibTeX DOI PDF
• Speicherung großer Datenmengen und Energieeffizienz (Thomas Ludwig, Manuel Dolz, Michael Kuhn, Julian Kunkel, Hermann Lenhart), 2015 BibTeX URL
• Predicting Performance of Non-Contiguous I/O with Machine Learning (Julian Kunkel, Eugen Betke, Michaela Zimmer), 2015 BibTeX DOI PDF

• Poster: 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), 2014-06-23 BibTeX URL
• Whitepaper: E10 – Exascale IO (Andre Brinkmann, Toni Cortes, Hugo Falter, Julian Kunkel, Sai Narasimhamurthy), 2014-06 BibTeX URL PDF
• Exascale Storage Systems – An Analytical Study of Expenses (Julian Kunkel, Michael Kuhn, Thomas Ludwig), 2014-06 BibTeX URL
• Feign: In-Silico Laboratory for Researching I/O Strategies (Jakob Lüttgau, Julian Kunkel), 2014 BibTeX URL
• Predicting Performance of Non-Contiguous I/O with Machine Learning (Julian Kunkel, Eugen Betke, Michaela Zimmer), 2014 BibTeX URL
• 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), 2014 BibTeX
• 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), 2014 BibTeX DOI PDF

• ICON DSL: A Domain-Specific Language for climate modeling (Raul Torres, Leonidas Lindarkis, Julian Kunkel, Thomas Ludwig), 2013-11-18 BibTeX URL
• Poster: Source-to-Source Translation for Climate Models (Raul Torres, Leonidas Lindarkis, Julian Kunkel), 2013-06-17 BibTeX URL
• Towards Self-optimization in HPC I/O (Michaela Zimmer, Julian Kunkel, Thomas Ludwig), 2013-06 BibTeX DOI PDF
• Evaluating Lossy Compression on Climate Data (Nathanael Hübbe, Al Wegener, Julian Kunkel, Yi Ling, Thomas Ludwig), 2013-06 BibTeX DOI PDF
• Using Simulation to Validate Performance of MPI(-IO) Implementations (Julian Kunkel), 2013-06 BibTeX DOI PDF
• Performance-optimized clinical IMRT planning on modern CPUs (Peter Ziegenhein, Cornelis Ph Kamerling, Mark Bangert, Julian Kunkel, Uwe Oelfke), 2013-05-08 BibTeX URL DOI
• Reducing the HPC-Datastorage Footprint with MAFISC – Multidimensional Adaptive Filtering Improved Scientific data Compression (Nathanel Hübbe, Julian Kunkel), 2013-05 BibTeX URL PDF
• 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), 2013-05 BibTeX URL PDF

• A Study on Data Deduplication in HPC Storage Systems (Dirk Meister, Jürgen Kaiser, Andre Brinkmann, Michael Kuhn, Julian Kunkel, Toni Cortes), 2012-11-10 BibTeX
• Simulating parallel programs on application and system level (Julian Kunkel), 2012-06 BibTeX URL DOI PDF
• Simulating Application and System Interaction with PIOsimHD (Julian Kunkel, Thomas Ludwig), 2012 BibTeX
• Scientific Computing: Performance and Efficiency in Climate Models (Sandra Schröder, Michael Kuhn, Nathanael Hübbe, Julian Kunkel, Timo Minartz, Petra Nerge, Florens Wasserfall, Thomas Ludwig), 2012 BibTeX
• Visualization of MPI(-IO) Datatypes (Julian Kunkel, Thomas Ludwig), 2012 BibTeX
• Tool Environments to Measure Power Consumption and Computational Performance (Timo Minartz, Daniel Molka, Julian Kunkel, Michael Knobloch, Michael Kuhn, Thomas Ludwig), 2012 BibTeX
• Simulation-Aided Performance Evaluation of Server-Side Input/Output Optimizations (Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2012 BibTeX
• IOPm – Modeling the I/O Path with a Functional Representation of Parallel File System and Hardware Architecture (Julian Kunkel, Thomas Ludwig), 2012 BibTeX
• Optimizations for Two-Phase Collective I/O (Michael Kuhn, Julian Kunkel, Yuichi Tsujita, Hidetaka Muguruma, Thomas Ludwig), 2012 BibTeX

• HDTrace – A Tracing and Simulation Environment of Application and System Interaction (Julian Kunkel), 2011-01-23 BibTeX PDF
• 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), 2011 BibTeX DOI PDF

• System Performance Comparison of Stencil Operations with the Convey HC-1 (Julian Kunkel, Petra Nerge), 2010-11-16 BibTeX URL
• Classification of Network Computers Based on Distribution of ICMP-echo Round-trip Times (Julian Kunkel, Jan C. Neddermeyer, Thomas Ludwig), 2010-09-28 BibTeX URL
• Poster: Benchmarking Application I/O in the Community (Julian Kunkel, Olga Mordvinova, Dennis Runz, Michael Kuhn, Thomas Ludwig), 2010-06-01 BibTeX URL Abstract PDF
• Poster: Simulation of Cluster Power Consumption and Energy-to-Solution (Timo Minartz, Julian Kunkel, Thomas Ludwig), 2010-04-14 BibTeX URL
• 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), 2010-01 BibTeX URL DOI
• Tracing Performance of MPI-I/O with PVFS2: A Case Study of Optimization (Yuichi Tsujita, Julian Kunkel, Stephan Krempel, Thomas Ludwig), 2010 BibTeX URL DOI
• Collecting Energy Consumption of Scientific Data (Julian Kunkel, Olga Mordvinova, Michael Kuhn, Thomas Ludwig), 2010 BibTeX URL DOI
• Simulation of power consumption of energy efficient cluster hardware (Timo Minartz, Julian Kunkel, Thomas Ludwig), 2010 BibTeX URL DOI
• I/O Performance Evaluation with Parabench – Programmable I/O Benchmark (Olga Mordvinova, Dennis Runz, Julian Kunkel, Thomas Ludwig), 2010 BibTeX URL DOI

• Tracing Internal Communication in MPI and MPI-I/O (Julian Kunkel, Yuichi Tsujita, Olga Mordvinova, Thomas Ludwig), 2009-12-29 BibTeX DOI
• USB Flash Drives as an Energy Efficiency Storage Alternative (Olga Mordvinova, Julian Kunkel, Christian Baun, Thomas Ludwig, Marcel Kunze), 2009-10 BibTeX DOI
• Poster: 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), 2009 BibTeX PDF
• Dynamic file system semantics to enable metadata optimizations in PVFS (Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2009 BibTeX URL DOI
• Small-file Access in Parallel File Systems (Philip Carns, Sam Lang, Robert Ross, Murali Vilayannur, Julian Kunkel, Thomas Ludwig), 2009 BibTeX URL DOI
• Using Non-blocking I/O Operations in High Performance Computing to Reduce Execution Times (David Buettner, Julian Kunkel, Thomas Ludwig), 2009 BibTeX URL DOI

• Bottleneck Detection in Parallel File Systems with Trace-Based Performance Monitoring (Julian Kunkel, Thomas Ludwig), 2008 BibTeX URL DOI
• Directory-Based Metadata Optimizations for Small Files in PVFS (Michael Kuhn, Julian Kunkel, Thomas Ludwig), 2008 – Awards: Best Paper BibTeX DOI

• Analysis of the MPI-IO Optimization Levels with the PIOViz Jumpshot Enhancement (Thomas Ludwig, Stephan Krempel, Michael Kuhn, Julian Kunkel, Christian Lohse), 2007 BibTeX URL DOI
• Performance Evaluation of the PVFS2 Architecture (Julian Kunkel, Thomas Ludwig), 2007 BibTeX DOI

• Tracing the MPI-IO Calls' Disk Accesses (Thomas Ludwig, Stephan Krempel, Julian Kunkel, Frank Panse, Dulip Withanage), 2006 BibTeX URL DOI

• The HPC Certification Program (Dr. Julian Kunkel), HPC-SIG meeting, London, UK, 2019-02-13 Presentation

• Opportunities for Integrating I/O Capabilities with Cylc (Dr. Julian Kunkel), Cylc Weather User Group; Supercomputing 2018, Dallas, USA, 2018-11-15 Presentation
• Towards an HPC Certification Program (Dr. Julian Kunkel, Kai Himstedt, Nathanael Hübbe, Hinnerk Stüben, Sandra Schröder, Michael Kuhn, Stephan Olbrich, Matthias Riebisch, Thomas Ludwig, Weronika Filinger, Jean-Thomas Acquaviva, Anja Gerbes, Lev Lafayette, ), Fifth SC Workshop on Best Practices for HPC Training and Education; Supercomputing 2018, Dallas, USA, 2018-11-12 Presentation
• The Virtual Institute for I/O (Dr. Julian Kunkel), BoF: The IO-500 and the Virtual Institute for I/O; Supercomputing 2018, Dallas, USA, 2018-11-14 Presentation
• The HPC Certification Program (Dr. Julian Kunkel), BoF: HPC Certification Program; Supercomputing 2018, Dallas, USA, 2018-11-15 Presentation
• Using Benchmarks to Understand Performance Behavior (Dr. Julian Kunkel), BoF: Analyzing Parallel I/O; Supercomputing 2018, Dallas, USA, 2018-11-13 Presentation
• Status of WP4: Exploitability (Dr. Julian Kunkel, Bryan N. Lawrence, Jakob Lüttgau, Neil Massey, Alessandro Danca, Sandro Fiore, Huang Hu), ESiWACE review meeting, DKRZ, Hamburg, Germany, 2018-11-06 Presentation
• Introducing the HPC Certification Program (Dr. Julian Kunkel), SIGHPC Education – Webinar, Internet, 2018-10-31 Presentation
• OpenSource Software (Dr. Julian Kunkel), Hacktoberfest, Thames Tower, Reading, UK, 2018-10-27 Presentation
• PeCoH – Performance Conscious HPC: Status (Dr. Julian Kunkel, Kai Himstedt, Nathanael Hübbe, Sandra Schröder, Michael Kuhn, Hinnerk Stüben, Thomas Ludwig, Stephan Olbrich, Matthias Riebisch), 8. HPC-Status-Konferenz der Gauß-Allianz, Erlangen, Germany, 2018-10-09 Presentation
• Overcoming Storage Issues of Earth-System Data with Intelligent Storage Systems (Dr. Julian Kunkel), 18th Workshop on high performance computing in meteorology, ECMWF, Reading, UK, 2018-09-27 Presentation
• RD&E in Compression (Dr. Julian Kunkel), NCAS Meeting, Reading, UK, 2018-07-27
• Comparison of Clang Abstract Syntax Trees using String Kernels (Raul Torres, Dr. Julian Kunkel, Manuel Dolz, Thomas Ludwig), HPCS 2018, Orleans, France, 2018-07-17 Presentation
• Challenges and Opportunities for I/O (Dr. Julian Kunkel), Gung Ho Networking Meeting, Reading, UK, 2018-07-04 Presentation
• Understanding Metadata Latency with MDWorkbench (Dr. Julian Kunkel, George Markomanolis), WOPSSS, Frankfurt, Germany, 2018-06-28 Presentation
• Cost and Performance Modeling for Earth System Data Management and Beyond (Dr. Julian Kunkel, Jakob Lüttgau), HPC IODC Workshop, Frankfurt, Germany, 2018-06-28 Presentation
• Community Development of Next Generation Semantic Interfaces (Dr. Julian Kunkel), Joint session of the HPC IODC Workshop and WOPSSS, Frankfurt, Germany, 2018-06-28 Presentation
• The Virtual Institute of I/O (Dr. Julian Kunkel), BoF: The IO-500 and the Virtual Institute of I/O, ISC HPC, Frankfurt, Germany, 2018-06-27 Presentation
• The Need for Next Generation Semantic Interfaces to Process Climate/Weather Workflows (Dr. Julian Kunkel), SIG IO UK, University of Reading, UK, 2018-06-06 Presentation
• Towards Intelligent Storage Systems (Dr. Julian Kunkel), Computer Science Workshop, University of Reading, UK, 2018-05-08 Presentation
• Creating a Meaningless Single Number to Appease Human Irrationality (Jay Lofstead, Dr. Julian Kunkel, John Bent, George Markomanolis), Lustre Users Group, Chicago, USA, 2018-04-26 Presentation
• Exploiting the Heterogeneous Storage Landscape in a Data Center (Dr. Julian Kunkel), Per3s: Performance and Scalability of Storage Systems Workshop, Rennes, France, 2018-01-12 Presentation

• Exploiting Weather and Climate Data at Scale (WP4) (Dr. Julian Kunkel), ESiWACE General Assembly, Berlin, Germany, 2017-12-12 Presentation
• The Virtual Institute for I/O and the IO-500 (Dr. Julian Kunkel), BoF: The Virtual Institute for I/O and the IO-500, Denver, USA, 2017-11-15 Presentation
• Establishing the IO-500 Benchmark (Dr. Julian Kunkel), PDSW/DISC Workshop WiP session, Denver, USA, 2017-11-13 Presentation
• Towards new storage interfaces – chance or curse? (Dr. Julian Kunkel), Workshop: Exascale I/O for Unstructured Grids, DKRZ, Hamburg, Germany, 2017-09-26 Presentation
• Empowering Scientists with Domain Specific Languages (Dr. Julian Kunkel), SciCADE 2017, Bath, UK, 2017-09-13 Presentation
• MPI-IO In-Memory Storage with the Kove XPD (Dr. Julian Kunkel), Workshop on Performance and Scalability of Storage Systems (WOPSSS), Frankfurt, Germany, 2017-06-22 Presentation
• Lustre at DKRZ (Dr. Julian Kunkel), ISC HPC, BoF: EOFS, Frankfurt, Germany, 2017-06-21 Presentation
• Fortrantestgenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Dr. 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) (Dr. Julian Kunkel), ISC HPC, Poster session, Frankfurt, Germany, 2017-06-20 Presentation
• BoF: The Virtual Institute for I/O and the IO-500 (Dr. Julian Kunkel), ISC HPC, Frankfurt, Germany, 2017-06-20 Presentation
• Research Achievements and Perspectives for HPC and Earth Science (Dr. Julian Kunkel), , Reading, UK, 2017-06-14 Presentation
• Big Data Analytics (Dr. Julian Kunkel), DKRZ Tour “Computational Sciences in Engineering”, Hamburg, Germany, 2017-06-08 Presentation
• Analysis of Input/Output Phenomena using Statistics and Machine Learning (Dr. Julian Kunkel), , HAW, Hamburg, 2017-05-31 Presentation
• Visual Analytics (Dr. Julian Kunkel), , HAW, Hamburg, 2017-05-31 Presentation
• IO-500 Status (Dr. Julian Kunkel), Data Benchmarking Workshop, LBNL, USA, 2017-06-25 Presentation
• Metadata Issues (Dr. Julian Kunkel), Data Benchmarking Workshop, LBNL, USA, 2017-06-25 Presentation
• Metadata/Small File Benchmarking and Status of the IO-500 (Dr. 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 (Dr. Julian Kunkel), SPPEXA Annual Plenary Meeting, Leibniz Supercomputing Centre, Munich, Germany, 2017-03-21 Presentation
• AIMES: Status of the Project (Dr. Julian Kunkel), AIMES Face-to-face Meeting, Leibniz Supercomputing Centre, Munich, Germany, 2017-03-20 Presentation
• AIMES Status Report: University of Hamburg (Dr. 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 (Dr. Julian Kunkel), Supercomputing Conference, Salt Lake City, USA, 2016-11-17 Presentation
• Statistical File Characterization and Status Update: Monitoring at DKRZ (Dr. Julian Kunkel), BoF: Analyzing Parallel I/O, Supercomputing Conference, Salt Lake City, USA, 2016-11-17 Presentation
• Middleware for Earth System Data (Dr. Julian Kunkel), PDSW-DISC Workshop, Salt Lake City, USA, 2016-11-14 Presentation
• MPI-IO In-Memory Storage with the Kove XPD (Dr. Julian Kunkel), PDSW-DISC Workshop, Salt Lake City, USA, 2016-11-14 Presentation
• Performance Conscious HPC (PeCoH) Kickoff (Dr. Julian Kunkel), PeCoH Kickoff, Hamburg, Germany, 2016-08-22 Presentation
• Additional I/O Considerations (Dr. Julian Kunkel), Bull cooperation meeting, Grenoble, France, 2016-07-04 Presentation
• BoF: VI4IO: The I/O Community Hosting the High-Performance Storage List (Dr. Julian Kunkel), ISC High Performance, Frankfurt, Germany, 2016-06-15 Presentation
• Analyzing Data Properties Using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Dr. Julian Kunkel), HPC-IODC Workshop, Frankfurt, Germany, 2016-06-23 Presentation
• Lustre at DKRZ (Dr. 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 (Dr. Julian Kunkel), ISC High Performance, Frankfurt, Germany, 2016-06-21 Presentation
• I/O Benchmarking (Dr. Julian Kunkel), JAMSTEC cooperation, Hamburg, Germany, 2016-06-17 Presentation
• I/O Perspectives for Earth Science Data (Dr. 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) (Dr. Julian Kunkel), SPPEXA annual symposium, Munich, Germany, 2016-01-27 Presentation
• AIMES overview, contributions of WR to WPs (Dr. Julian Kunkel), AIMES kickoff meeting, Munich, Germany, 2016-01-27 Presentation
• Compression (in HDF5) in the projects ICOMEX and AIMES (Dr. Julian Kunkel), Informal meeting, Hamburg, Germany, 2016-01-18 Presentation

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

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

• Guiding Parallel I/O – The Semantical Gap (Dr. Julian Kunkel), ZKI-Tagung AK Supercomputing, Darmstadt, Germany, 2013-10-10 Presentation
• Monitoring and Optimization of I/O-Performance with SIOX (Dr. Julian Kunkel), HPC-Status-Konferenz der Gauß-Allianz, Dresden, Germany, 2013-09-05 Presentation
• Using Simulation to Validate Performance of MPI(-IO) Implementations (Dr. Julian Kunkel), International Supercomputing Conference, Leipzig, Germany, 2013-05-20 Presentation
• Towards Intelligent Self-Optimisation in HPC I/O (Dr. 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 (Dr. Julian Kunkel), Paderborn Center for Parallel Computing, Paderborn, 2013-05-05 Presentation

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

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

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

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

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

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

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

• Accessibility Assistance for the Interactive Navigation of Texts, Imad Hamoumi (Master's Thesis), Advisors: Patricio Farrell, Dr. Julian Kunkel, 2019-01-28, Thesis BibTeX
• Entwicklung eines computergesteuerten Akteurs für das kooperative Spielen in einem dyadischen Geschicklichkeitsspiel, Melanie Budde (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, 2019-01-17, Thesis BibTeX

• Comparing Naïve Bayesian Networks to Support Vector Machines to predict Stock Prices Based on Press Release Sentiment, Max Lübbering (Master's Thesis), Advisors: Dr. Julian Kunkel, Patricio Farrell, 2018-12-04, Thesis BibTeX
• Understanding Customer Behaviour to Optimize Product Sorting for E-Commerce Websites, Amina Voloder (Master's Thesis), Advisors: Dr. Julian Kunkel, Antonia Wrobel, 2018-08-07, Thesis BibTeX
• Comparison of Compiler’s Intermediate Representations and Input/Output Access Patterns with String Kernels, Raul Torres (PhD's Thesis), Advisors: Thomas Ludwig, Dr. Julian Kunkel, Manuel F. Dolz, 2018-06-18, Thesis BibTeX
• Large-Scale Accessibility Analysis Using OpenStreetMap Data, Martin Poppinga (Master's Thesis), Advisors: Dr. Julian Kunkel, 2018-06-06, Thesis BibTeX
• Vector Folding for Icosahedral Earth System Models, Jonas Tietz (Bachelor's Thesis), Advisors: Nabeeh Jumah, Dr. Julian Kunkel, 2018-03-26, Thesis BibTeX
• Enabling Single Process Testing of MPI in Massive Parallel Applications, Tareq Kellyeh (Master's Thesis), Advisors: Dr. Julian Kunkel, Christian Hovy, 2018-03-20, Thesis BibTeX
• Modeling and Performance Prediction of HDF5 data on Objectstorage, Roman Jerger (Master's Thesis), Advisors: Dr. Julian Kunkel, Jakob Lüttgau, 2018-03-15, Thesis BibTeX

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

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

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

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

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

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

• Tracing Internal Behavior in PVFS, Tien Duc Tien (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, Thomas Ludwig, 2009-10-05, Thesis BibTeX
• Simulation-Aided Performance Evaluation of Input/Output Optimizations for Distributed Systems, Michael Kuhn (Master's Thesis), Advisors: Dr. Julian Kunkel, Thomas Ludwig, 2009-09-30, Thesis BibTeX 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: Dr. Julian Kunkel, Thomas Ludwig, 2009-08-31, Thesis BibTeX
• Model and simulation of power consumption and power saving potential of energy efficient cluster hardware, Timo Minartz (Master's Thesis), Advisors: Dr. Julian Kunkel, Thomas Ludwig, 2009-08-27, Thesis BibTeX URL

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

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