Dr. Julian Kunkel

E-mail	julian.kunkel@gwdg.de
PGP	1468 1A86 A908 D77E B40F 45D6 2B15 73A5 9D39 A28E
Address	RZGö, Burckhardtweg 4, Georg-August Universität Göttingen, room 4.111
Telephone	+49 551/39-30144

Dr. Kunkel is a Professor in High-Performance Computing at the University of Göttingen and the Deputy Head High-Performance Computing at GWDG. Previously, he was a Lecturer at the Computer Science Department at the University of Reading and a postdoc in the research department of the German Climate Computing Center (DKRZ).
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 the software engineering of scientific software. Dr. Kunkel is a member of many international program committees, he is a founding member of the IO500 benchmarking effort, the Virtual Institute for I/O, and the HPC Certification Forum. He is committed to excellence in research and teaching.

Data-driven workflows
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

2021, Chair of the steering committee, HPC Certification Forum
2021, Member of the OSSG Committee, BCS Open Source Specialist Group
2021, IO-500 steering committee, The Virtual Institute for IO
2021, Steering committee member, ISC High Performance
2020, Chair of the steering committee, HPC Certification Forum
2020, Member of the OSSG Committee, BCS Open Source Specialist Group
2020, IO-500 steering committee, The Virtual Institute for IO
2020, Steering committee member, ISC High Performance
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

2021, REX-IO 2021: 1st Workshop on Re-envisioning Extreme-Scale I/O for Emerging Hybrid HPC Workloads
2021, International Conference on Advanced Communications and Computation (INFOCOMP)
2021, International Conference for High Performance Computing, Networking, Storage and Analysis (SC) – Data Analytics, Visualization, and Storage track
2021, International Conference on Computational Science (ICCS)
2021, IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing (CCGRID)
2021, Workshop on Challenges and Opportunities of Efficient and Performant Storage Systems (CHEOPS)
2021, Supercomputing Frontiers Europe (SCFE)
2021, ISC High-Performance – HPC Algorithms & Applications track
2020, The Workshop on Performance and Scalability of Storage Systems (WOPSSS), ISC High Performance
2020, Supercomputing Frontiers Europe (SCFE)
2020, Performance Monitoring and Analysis of Cluster Systems Workshop (PMACS), Euro-Par
2020, International Conference on Advanced Communications and Computation (INFOCOMP)
2020, The IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing (CCGRID)
2019, The 20th IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing (CCGRID)
2019, Joint International Workshop On Parallel Data Storage & Data Intensive Scalable Computing Systems (PDSW-DISCS)
2019, International Conference on Advanced Communications and Computation (INFOCOMP)
2019, Conference on Algorithms and Architectures for Parallel Processing (ICA3PP)
2019, Performance Monitoring and Analysis of Cluster Systems (PMACS)
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)

2021, Nature Computational Science
2021, PeerJ Computer Science
2021, Journal of Computer Science and Technology
2020, MDPI Algorithms
2021, Journal of Computer Science and Technology
2020, MDPI Energies
2020, SoftwareX
2020, Transactions on Parallel and Distributed Systems
2020, IEEE Letters of the Computer Society
2020, IEEE Access
2020, MDPI Journal Applied Sciences
2020, Journal of Computer Science and Technology (JCST)
2019, Transactions on Parallel and Distributed Systems
2019, IEEE Transactions on Big Data
2019, MDPI Journal Sensors
2019, MDPI Journal Symmetry
2019, Supercomputer Frontiers and Innovations
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)

2020, Organizer, Virtual Workshop: Toward a Globally Acknowledged and Free HPC Certification
2020-05-04, (Co-)Organizer, BoF: The IO-500 and the Virtual Institute of I/O
2020, (Co-)Organizer, Machine Learning for Nowcasting Workshop
2020, (Co-)Organizer, Dagstuhl Seminar: Understanding I/O Behavior in Scientific and Data-Intensive Computing
2020, Organizer, Summer School on Effective HPC for Climate and Weather
2020, Organizer, Workshop on Storage Challenges in the UK
2020, Organizer, Workshop: HPC I/O in the Data Center (HPC-IODC). ISC High Performance
2019, Organizer, BoF: Data-Centric Computing for the Next Generation
2019, Organizer, BoF: International HPC Certification Program
2019, Organizer, BoF: The IO-500 and the Virtual Institute of I/O. ISC High Performance
2019, Organizer, BoF: Analyzing Parallel I/O. Supercomputing Conference
2019, Organizer, The Exabyte Data Challenge
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, Birds-of-a-Feather Session: Analyzing Parallel I/O. Supercomputing Conference
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, Strategic Infrastructure Development (SID) of the Department, 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

Lecture „Distributed Systems and Parallel Computing (CS3DP19)“ (Contact: Dr. Julian Kunkel)
Lecture „Programming in C/C++ (CS1PC20)“ (Contact: Dr. Julian Kunkel)

Lecture „Programming (CS1PR16)“ (Contact: Dr. Julian Kunkel)
Lecture „Algorithms and Operating Systems (CS2AO17)“ (Contact: Xia Hong)

Lecture „Distributed Systems and Parallel Computing (CS3DP19)“ (Contact: Dr. Julian Kunkel)
Lecture „Programming (CS1PR16)“ (Contact: Dr. Julian Kunkel)

Lecture „Programming (CS1PR16)“ (Contact: James Ferryman)

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

Extracurricular Activity „Linux User Group“

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

Lecture „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)

Lecture „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)

Lecture „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)

Lecture „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)

Lecture „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

User-Centric System Fault Identification Using IO500 Benchmark (Radita Liem, Dmytro Povaliaiev, Jay Lofstead, Julian Kunkel, Christian Terboven), International Parallel Data Systems Workshop (PDSW), St. Louis, To appear BibTeX URL PDF
Toward a Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis (Julian Kunkel, Eugen Betke), In High Performance Computing: ISC High Performance 2021 International Workshops, Revised Selected Papers, Lecture Notes in Computer Science, Springer, ISC HPC, Frankfurt, Germany, To appear BibTeX PDF

Analyzing the Performance of the S3 Object Storage API for HPC Workloads (Frank Gadban, Julian Kunkel), In Applied Sciences, Series: 11, MDPI, 2021-09-14 BibTeX URL DOI PDF
A Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis (Julian Kunkel, Eugen Betke), In The Journal of High-Performance Storage, Series: 2, VI4IO, ISSN: 2748-7814, 2021-08-09 BibTeX URL DOI PDF
Classifying Temporal Characteristics of Job I/O Using Machine Learning Techniques (Eugen Betke, Julian Kunkel), In The Journal of High-Performance Storage, Series: 1, VI4IO, ISSN: 2748-7814, 2021-01-29 BibTeX URL DOI PDF

Investigating the Overhead of the REST Protocol to Reveal the Potential for Using Cloud Services for HPC Storage (Frank Gadban, Julian Kunkel, Thomas Ludwig), In High Performance Computing: ISC High Performance 2020 International Workshops, Revised Selected Papers, Lecture Notes in Computer Science (12321), pp. 161-176, (Editors: Heike Jagode, Hartwig Anzt, Dr. Guido Juckeland, Hatem Ltaief), Springer, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-59851-8, ISSN: 1611-3349, 2020-10-20 BibTeX DOI PDF
The Importance of Temporal Behavior when Classifying Job IO Patterns Using Machine Learning Techniques (Eugen Betke, Julian Kunkel), In High Performance Computing: ISC High Performance 2020 International Workshops, Revised Selected Papers, Lecture Notes in Computer Science (12321), pp. 191-205, (Editors: Heike Jagode, Hartwig Anzt, Guido Juckeland, Hatem Ltaief), Springer, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-59851-8, ISSN: 1611-3349, 2020-10-20 BibTeX DOI PDF
AIMES: Advanced Computation and I/O Methods for Earth-System Simulations (Julian Kunkel, Nabeeh Jumah, Anastasiia Novikova, Thomas Ludwig, Hisashi Yashiro, Naoya Maruyama, Mohamed Wahib, John Thuburn), In Lecture Notes in Computer Science, Series: Volume 7, Number 2, pp. 61-102, (Editors: Hans-Joachim Bungartz, Severin Reiz, Benjamin Uekermann, Philipp Neumann, Wolfgang E. Nagel), Springer International Publishing, ISBN: 978-3-030-47956-5, ISSN: 2197-7100, 2020-07-31 BibTeX DOI PDF
The HPC Certification Forum: Toward a Globally Acknowledged HPC Certification (Julian Kunkel, Weronika Filinger, Christian Meesters, Anja Gerbes), In Computing in Science and Engineering, Series: Volume 22, Issue 4, pp. 110-114, IEEE, ISSN: 1558-366X, 2020-07 BibTeX URL DOI PDF
Semi-automatic Assessment of I/O Behavior by Inspecting the Individual Client-Node Timelines – An Explorative Study on 10^6 Jobs (Eugen Betke, Julian Kunkel), In High Performance Computing: ISC High Performance 2020, Lecture Notes in Computer Science, Springer, ISC HPC, Frankfurt, Germany, 2020-06 BibTeX PDF
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 (11997), pp. 69-81, (Editors: Ulrich Schwardmann, Christian Boehme, Dora B. Heras, Valeria Cardellini, Emmanuel Jeannot, Antonio Salis, Claudio Schifanella, Ravi Reddy Manumachu, Dieter Schwamborn, Laura Ricci, Oh Sangyoon, Thomas Gruber, Laura Antonelli, Stephen L. Scott), Springer, COLOC - Workshop on Data Locality, Göttingen, Germany, ISBN: 978-3-030-48340-1, ISSN: 1611-3349, 2020-05-29 BibTeX DOI PDF
Parallelization and I/O Performance Optimization of a Global Nonhydrostatic Dynamical Core using MPI (Tiejun Wang, Zhuang Liu, Julian Kunkel, Changming Zhao), In Computers, Materials and Continua, Series: Volume 63, Issue 3, pp. 1399-1413, Tech Science Press, ISSN: 1546-2226, 2020-04-30 BibTeX DOI PDF
High-Performance Techniques for Big Data Processing (Philipp Neumann, Julian Kunkel), In Knowledge Discovery in Big Data from Astronomy and Earth Observation (Petr Skoda, Fathalrahman Adam), pp. 137–158, Elsevier (3251 Riverport Lane, St. Louis, Missouri 63043), ISBN: 978-0-12-819154-5, 2020-04-10 BibTeX
Potential of I/O Aware Workflows in Climate and Weather (Julian Kunkel, Luciana Pedro), In Supercomputing Frontiers and Innovations, Series: Volume 7, Number 2, pp. 35-53, (Editors: Jack Dongarra, Vladimir Voevodin), Publishing Center of South Ural State University (454080, Lenin prospekt, 76, Chelyabinsk, Russia), ISSN: 2313-8734, 2020-04 BibTeX DOI PDF
One Year HPC Certification Forum in Retrospective (Julian Kunkel, Jean-Thomas Acquaviva, Kai Himstedt, Weronika Filinger, Anja Gerbes, Lev Lafayette), In Journal of Computational Science Education, Series: Volume 11, Issue 1, pp. 29-35, (Editors: Steven I. Gordon), ISSN: 2153-4136, 2020-01 BibTeX URL DOI PDF
Contributing HPC Skills to the HPC Certification Forum (Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, Anja Gerbes, Lev Lafayette), In Journal of Computational Science Education, Series: Volume 11, Issue 1, pp. 106-107, (Editors: Steven I. Gordon), ISSN: 2153-4136, 2020-01 BibTeX URL DOI PDF

Tracking User-Perceived I/O Slowdown via Probing (Julian Kunkel, Eugen Betke), In High Performance Computing: ISC High Performance 2019 International Workshops, Frankfurt/Main, Germany, June 16-20, 2019, Revised Selected Papers, Lecture Notes in Computer Science (11887), pp. 169–182, (Editors: Michèle Weiland, Guido Juckeland, Sadaf Alam, Heike Jagode), Springer, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349, 2019-12-03 BibTeX URL DOI PDF
Scalable Parallelization of Stencils using MODA (Nabeeh Jumah, Julian Kunkel), In High Performance Computing: ISC High Performance 2019 International Workshops, Frankfurt/Main, Germany, June 16-20, 2019, Revised Selected Papers, Lecture Notes in Computer Science (11887), pp. 142–154, (Editors: Michèle Weiland, Guido Juckeland, Sadaf Alam, Heike Jagode), Springer, P^3MA workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349, 2019-12-03 BibTeX URL DOI PDF
Footprinting Parallel I/O – Machine Learning to Classify Application’s I/O Behavior (Eugen Betke, Julian Kunkel), In High Performance Computing: ISC High Performance 2019 International Workshops, Frankfurt/Main, Germany, June 16-20, 2019, Revised Selected Papers, Lecture Notes in Computer Science (11887), pp. 214–226, (Editors: Michèle Weiland, Guido Juckeland, Sadaf Alam, Heike Jagode), Springer, HPC IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349, 2019-12-03 BibTeX URL DOI PDF
Analysis of parallel I/O use on the UK national supercomputing service, ARCHER using Cray's LASSi and EPCC SAFE (Andrew Turner, Dominic Sloan-Murphy, Karthee Sivalingam, Harvey Richardson, Julian Kunkel), CUG, Montreal, Canada, 2019-10-11 BibTeX URL PDF
What Company Does My News Article Refer to? Tackling Multi Class Problems With Topic Modeling (Max Lübbering, Julian Kunkel, Patricio Farrell), In Proceedings of the Conference on “Lernen, Wissen, Daten, Analysen”, Berlin, Germany, September 30 - October 2, 2019, CEUR Workshop Proceedings (2454), pp. 353–364, (Editors: Robert Jäschke, Matthias Weidlich), CEUR-WS.org, LWDA 2019, Berlin, Germany, 2019-09-25 BibTeX URL PDF
Poster: International HPC Certification Program (Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, Lev Lafayette, Anja Gerbes, Waseem Kamleh, Sharan Kalwan), ISC High Performance, Frankfurt, Germany, 2019-06-19 BibTeX URL PDF
Poster: 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), ISC High Performance, Frankfurt, Germany, 2019-06-19 BibTeX URL PDF
Poster: Performance Conscious HPC (PeCoH) - 2019 (Kai Himstedt, Nathanael Hübbe, Sandra Schröder, Hendryk Bockelmann, Michael Kuhn, Julian Kunkel, Stephan Olbrich, Thomas Ludwig, Matthias Riebisch, Markus Stammberger, Hinnerk Stüben), ISC High Performance, Frankfurt, Germany, 2019-06-19 BibTeX URL PDF
Poster: The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent, George Markomanolis), ISC High Performance 2019, Frankfurt, Germany, 2019-06-19 BibTeX URL PDF
Interference of Billing and Scheduling Strategies for Energy and Cost Savings in Modern Data Centers (Julian Kunkel, Hayk Shoukourian, Reza Heidari, Torsten Wilde), In Sustainable Computing: Informatics and Systems, Series: Sustainable Computing, (Editors: Ishfaq Ahmad), Elsevier, ISSN: 2210-5379, 2019-04-19 BibTeX DOI PDF
A blueprint for the new Strategic Research Agenda for High Performance Computing (Gabriel Antoniu, Marc Asch, Peter Bauer, Costas Bekas, Pascale Bernier-Bruna, Francois Bodin, Laurent Cargemel, Paul Carpenter, Marc Duranton, Maike Gilliot, Hans-Christian Hoppe, Jens Krueger, Julian Kunkel, Erwin Laure, Jean-Francois Lavignon, Guy Lonsdale, Michael Malms, Fabio Martinelli, Sai Narasimhamurthy, Marcin Ostasz, Maria Perez, Dirk Pleiter, Andrea Reale, Pascale Rosse-Laurent), ETP4HPC, EXDCI, 2019-04 BibTeX URL
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 Computer Society (Washington, DC, USA), SBAC-PAD 2018, Lyon, France, ISBN: 978-1-5386-7769-8, ISSN: 1550-6533, 2019-02-21 BibTeX DOI PDF
Toward Understanding I/O Behavior in HPC Workflows (Jakob Lüttgau, Shane Snyder, Philip Carns, Justin M. Wozniak, Julian Kunkel, Thomas Ludwig), In IEEE/ACM 3rd International Workshop on Parallel Data Storage & Data Intensive Scalable Computing Systems (PDSW-DISCS), pp. 64–75, IEEE Computer Society (Washington, DC, USA), PDSW-DISCS, Dallas, Texas, ISBN: 978-1-7281-0192-7, 2019-02-11 BibTeX DOI
Tools for Analyzing Parallel I/O (Julian Kunkel, Eugen Betke, Matt Bryson, Philip Carns, Rosemary Francis, Wolfgang Frings, Roland Laifer, Sandra Mendez), In High Performance Computing: ISC High Performance 2018 International Workshops, Frankfurt/Main, Germany, June 28, 2018, Revised Selected Papers, Lecture Notes in Computer Science (11203), pp. 49–70, (Editors: Rio Yokota, Michele Weiland, John Shalf, Sadaf Alam), Springer, ISC Team, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349, 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), In High Performance Computing: ISC High Performance 2018 International Workshops, Frankfurt/Main, Germany, June 28, 2018, Revised Selected Papers, Lecture Notes in Computer Science (11203), pp. 131–144, (Editors: Rio Yokota, Michele Weiland, John Shalf, Sadaf Alam), Springer, ISC Team, WOPSSS workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349, 2019-01-25 BibTeX DOI PDF
Understanding Metadata Latency with MDWorkbench (Julian Kunkel, George S. Markomanolis), In High Performance Computing: ISC High Performance 2018 International Workshops, Frankfurt/Main, Germany, June 28, 2018, Revised Selected Papers, Lecture Notes in Computer Science (11203), pp. 75–88, (Editors: Rio Yokota, Michele Weiland, John Shalf, Sadaf Alam), Springer, ISC Team, WOPSSS workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349, 2019-01-25 BibTeX DOI PDF
Performance Portability of Earth System Models with User-Controlled GGDML code Translation (Nabeeh Jum'ah, Julian Kunkel), In High Performance Computing: ISC High Performance 2018 International Workshops, Frankfurt/Main, Germany, June 28, 2018, Revised Selected Papers, Lecture Notes in Computer Science (11203), pp. 693–710, (Editors: Rio Yokota, Michele Weiland, John Shalf, Sadaf Alam), Springer, ISC Team, P3MA workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349, 2019-01-25 BibTeX DOI PDF
Cost and Performance Modeling for Earth System Data Management and Beyond (Jakob Lüttgau, Julian Kunkel), In High Performance Computing: ISC High Performance 2018 International Workshops, Frankfurt/Main, Germany, June 28, 2018, Revised Selected Papers, Lecture Notes in Computer Science (11203), pp. 23–35, (Editors: Rio Yokota, Michele Weiland, John Shalf, Sadaf Alam), Springer, ISC Team, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349, 2019-01-25 BibTeX DOI PDF
Beating data bottlenecks in weather and climate science (Bryan N. Lawrence, Julian Kunkel, Jonathan Churchill, Neil Massey, Philip Kershaw, Matt Pritchard), In Extreme Data Workshop 2018, Schriften des Forschungszentrums Jülich IAS Series (40), pp. 31–36, (Editors: Martin Schultz, Dirk Pleiter, Peter Bauer), Forschungszentrum Jülich, Extreme Data Workshop, Jülich, Germany, ISBN: 978-3-95806-392-1, ISSN: 1868-8489, 2019-01-25 BibTeX URL 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), In Journal of Computational Science Education, Series: Volume 10, Issue 1, pp. 88–89, (Editors: Steven I. Gordon), 2019-01-11 BibTeX URL DOI
Automatic Vectorization of Stencil Codes with the GGDML Language Extensions (Nabeeh Jum'ah, Julian Kunkel), In Workshop on Programming Models for SIMD/Vector Processing (WPMVP'19), February 16, 2019, Washington, DC, USA, WPMVP, pp. 1–7, ACM (New York, NY, USA), PPoPP 2019, WPMVP-2019, Washington DC, USA, ISBN: 978-1-4503-6291-7/19/02, 2019 BibTeX URL DOI PDF

Comparison of Clang Abstract Syntax Trees using String Kernels (Raul Torres, Julian Kunkel, Manuel F. Dolz, Thomas Ludwig), In 2018 International Conference on High Performance Computing & Simulation (HPCS), pp. 106–113, IEEE Computer Society (Washington, DC, USA), HPCS 2018, Orleans, France, ISBN: 978-1-5386-7879-4, 2018-11-01 BibTeX DOI
A Similarity Study of I/O Traces via String Kernels (Raul Torres, Julian Kunkel, Manuel F. Dolz, Thomas Ludwig), In The Journal of Supercomputing, pp. 1–13, Springer, ISSN: 0920-8542, 2018-07-03 BibTeX DOI
Poster: A user-controlled GGDML Code Translation Technique for Performance Portability of Earth System Models (Nabeeh Jumah, Julian Kunkel), ISC HPC, Frankfurt, Germany, 2018-06-26 BibTeX URL PDF
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), ISC HPC, Frankfurt, Germany, 2018-06-26 BibTeX URL PDF
Poster: International HPC Certification Program (Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, William Jalby, Lev Lafayette), ISC HPC, Frankfurt, Germany, 2018-06-26 BibTeX URL PDF
Poster: The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent), ISC HPC, Frankfurt, Germany, 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), ISC HPC, Frankfurt, Germany, 2018-06-26 BibTeX URL PDF
Poster: Automatic Profiling for Climate Modeling (Anja Gerbes, Nabeeh Jumah, Julian Kunkel), Euro LLVM, Bristol, United Kingdom, 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), 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 BibTeX URL DOI PDF

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), 2017-12 BibTeX URL DOI PDF
Poster: Toward Decoupling the Selection of Compression Algorithms from Quality Constraints (Julian Kunkel, Anastasia Novikova, Eugen Betke), SC17, Denver, CO, USA, 2017-11-14 BibTeX PDF
Poster: Adaptive Tier Selection for NetCDF and HDF5 (Jakob Lüttgau, Eugen Betke, Olga Perevalova, Julian Kunkel, Michael Kuhn), SC17, Denver, CO, USA, 2017-11-14 BibTeX PDF
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 BibTeX URL DOI PDF
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, 2017-10-20 BibTeX DOI PDF
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, 2017-10-20 BibTeX DOI PDF
Poster: Icosahedral Modeling with GGDML (Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif), DKRZ user workshop 2017, Hamburg, Germany, 2017-10-09 BibTeX PDF
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 BibTeX URL DOI
Poster: FortranTestGenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Christian Hovy, Julian Kunkel), ISC High Performance 2017, Frankfurt, 2017-06-20 BibTeX PDF
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), ISC 2017, Germany, Frankfurt, 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), ISC 2017, Germany, Frankfurt, 2017-06-20 BibTeX URL
Poster: The Virtual Institute for I/O and the IO-500 (Julian Kunkel, Jay Lofstead, John Bent), ISC High Performance 2017, Frankfurt, Germany, 2017-06-20 BibTeX PDF
Poster: Enhanced Adaptive Compression in Lustre (Anna Fuchs, Michael Kuhn, Julian Kunkel, Thomas Ludwig), ISC High Performance 2017, Frankfurt, Germany, 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), ISC High Performance 2017, Frankfurt, Germany, 2017-06-20 BibTeX URL
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), Research Group: Scientific Computing, University of Hamburg (Deutsches Klimarechenzentrum GmbH, Bundesstraße 45a, D-20146 Hamburg), 2017-06-19 BibTeX PDF
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 BibTeX PDF
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 BibTeX URL
Poster: Intelligent Selection of Compiler Options to Optimize Compile Time and Performance (Anja Gerbes, Julian Kunkel, Nabeeh Jumah), Euro LLVM, Saarbrücken, 2017-03-27 BibTeX URL PDF
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 BibTeX DOI PDF
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 BibTeX DOI PDF
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 BibTeX DOI PDF

Poster: Predicting I/O-performance in HPC using Artificial Neural Networks (Jan Fabian Schmid, Julian Kunkel), ISC High Performance 2015, Frankfurt, 2016-21-06 BibTeX PDF
Poster: Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features (Julian Kunkel), ISC High Performance 2016, Frankfurt, 2016-21-06 – Awards: Best Poster BibTeX PDF
Interaktiver C-Programmierkurs, ICP (Julian Kunkel, Jakob Lüttgau), In Synergie, Fachmagazin für Digitalisierung in der Lehre (2), pp. 74–75, 2016-11-16 BibTeX URL
Poster: Utilizing In-Memory Storage for MPI-IO (Julian Kunkel, Eugen Betke), SC16, Salt Lake City, Utah, USA, 2016-11-15 BibTeX URL PDF
Poster: Modeling and Simulation of Tape Libraries for Hierarchical Storage Systems (Jakob Lüttgau, Julian Kunkel), SC16, Salt Lake City, Utah, USA, 2016-11-15 BibTeX URL PDF
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), 2016-10 BibTeX URL DOI
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), 2016-10 BibTeX URL DOI
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), 2016-06 BibTeX URL DOI PDF
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 BibTeX DOI PDF
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 BibTeX DOI

Poster: Interaktiver C Kurs (ICP) (Julian Kunkel, Thomas Ludwig, Jakob Lüttgau, Dion Timmermann, Christian Kautz, Volker Skwarek), Campus Innovation 2015, Hamburg, 2015-11-27 BibTeX URL
Poster: Using Machine Learning to Predict the Performance of Non-Contiguous I/O (Julian Kunkel, Michaela Zimmer, Eugen Betke), Frankfurt, Germany, 2015-07-13 BibTeX URL
Poster: Advanced Data Sieving for Non-Contigouous I/O (Enno Zickler, Julian Kunkel), Frankfurt, Germany, 2015-07-13 BibTeX URL
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 BibTeX URL DOI PDF
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 BibTeX PDF
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 BibTeX DOI PDF
Speicherung großer Datenmengen und Energieeffizienz (Thomas Ludwig, Manuel Dolz, Michael Kuhn, Julian Kunkel, Hermann Lenhart), Max-Planck-Gesselschaft (München), 2015 BibTeX URL
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 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), ISC'14 Leipzig, 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), In Supercomputing Frontiers and Innovations, Series: Volume 1, Number 1, pp. 116–134, (Editors: Jack Dongarra, Vladimir Voevodin), 2014-06 BibTeX URL
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 BibTeX URL
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), Lecture Notes in Computer Science, ISC events, ISC'14, Leipzig, ISBN: 978-3-319-07517-4, 2014 BibTeX DOI PDF
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 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), In Tools for High Performance Computing 2013, pp. 91–105, ISBN: 978-3-319-08143-4, 2014 BibTeX

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 BibTeX URL
Poster: Source-to-Source Translation for Climate Models (Raul Torres, Leonidas Lindarkis, Julian Kunkel), International Supercomputing Conference 2013, Leipzig, Germany, 2013-06-17 BibTeX URL
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 BibTeX DOI PDF
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 BibTeX DOI PDF
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 BibTeX DOI PDF
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 BibTeX URL DOI
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 BibTeX URL PDF
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 BibTeX URL PDF

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 (Washington, DC, USA), SC'12, Salt Lake City, USA, 2012-11-10 BibTeX
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 BibTeX URL DOI PDF
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), University of Ghent, ELIS Department, ParCo 2011, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452, 2012 BibTeX
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), University of Ghent, ELIS Department, ParCo 2011, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452, 2012 BibTeX
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), Munich Network Management Team, PDP 2012, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192, 2012 BibTeX
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 BibTeX
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), Munich Network Management Team, PDP 2012, Garching, Germany, ISBN: 978-3-902457-31-8, 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), 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), Munich Network Management Team, PDP 2012, Garching, Germany, ISBN: 978-3-902457-31-8, 2012 BibTeX
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), Munich Network Management Team, PDP 2012, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192, 2012 BibTeX

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 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), In Computer Science - Research and Development, Series: 1, (Editors: Thomas Ludwig), Springer (Berlin / Heidelberg, Germany), 2011 BibTeX DOI PDF

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 BibTeX URL
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 BibTeX URL
Poster: Benchmarking Application I/O in the Community (Julian Kunkel, Olga Mordvinova, Dennis Runz, Michael Kuhn, Thomas Ludwig), International Supercomputing Conference, Hamburg, Germany, 2010-06-01 BibTeX URL Abstract PDF
Poster: Simulation of Cluster Power Consumption and Energy-to-Solution (Timo Minartz, Julian Kunkel, Thomas Ludwig), International Conference on Energy-Efficient Computing and Networking, Passau, Germany, 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), In Biotechnology Journal, Series: 5-1, pp. 39–49, WILEY-VCH (Weinheim, Germany), ISSN: 1860-7314, 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), In Parallel Computing: From Multicores and GPU's to Petascale, pp. 379–386, IOS Press, PARCO 2009, ISBN: 978-1-60750-530-3, 2010 BibTeX URL DOI PDF
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 BibTeX URL DOI
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 BibTeX URL DOI
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 BibTeX URL DOI

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), Hiroshima University, PDCAT-09, Higashi Hiroshima, Japan, ISBN: 978-0-7695-3914-0, 2009-12-29 BibTeX DOI
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), IEEE/ACM, GRID-09, Banff, Alberta, Canada, ISBN: 978-1-4244-5148-7, 2009-10 BibTeX DOI
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), University of Rome, IPDPS-09, Rome, Italy, ISBN: 978-1-4244-3751-1, 2009 BibTeX URL DOI
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 BibTeX URL DOI
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), CSC - IT, EuroPVM/MPI-09, Espoo, Finland, ISBN: 978-3-642-03769-6, 2009 BibTeX URL 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), German Symposium on Systems Biology 2009, Heidelberg, Germany, 2009 BibTeX PDF

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), University of Las Palmas de Gran Canaria, Euro-Par-08, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0, 2008 BibTeX URL DOI
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), University of Las Palmas de Gran Canaria, Euro-Par-08, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0, 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), 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), Institut national de recherche en informatique et automatique, EuroPVM/MPI-07, Paris, France, ISBN: 978-3-540-75415-2, 2007 BibTeX URL DOI
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), Euromicro, PDP-07, Napoli, Italy, ISBN: 0-7695-2784-1, 2007 BibTeX 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), C&C Research Labs, NEC Europe Ltd., and the Research Centre Jülich, EuroPVM/MPI-06, Bonn, Germany, ISBN: 3-540-39110-X, 2006 BibTeX URL DOI

Data at Scale in ESiWACE: Progress of WP4 (Bryan Lawrence, Dr. Julian Kunkel), ESiWACE Annual General Assembly, Virtual, 2021-09-27 Presentation
Input/Output and Middleware (Dr. Julian Kunkel), Summer School on Effective HPC for Climate and Weathe, Virtual, 2021-08-23 Presentation Video
Lifting the user I/O abstraction to workflow level a possibility or in vain? (Dr. Julian Kunkel), Dagstuhl Seminar, Schloß Dagstuhl, 2021-08-16 Presentation
Data Systems at Scale in Climate and Weather (Dr. Julian Kunkel), Hidalgo Workshop, Virtual, 2021-07-09 Presentation
A Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis (Dr. Julian Kunkel), HPC IODC Workshop, Virtual, 2021-07-02 Presentation
The Virtual Institute for I/O (Dr. Julian Kunkel), IO500 Release ISC 2021, ISC HPC, 2021-07-02 Presentation
Data-Centric Computing for the Next Generation (Dr. Julian Kunkel, Jay Lofstead, Jean-Thomas Acquaviva), BoF session, ISC HPC 2021, 2021-06-27 Presentation
The HPC Certification Forum in 2021 (Dr. Julian Kunkel), , HPC Certification Forum Annual Meeting, 2021-06-27 Presentation

Smart Processing for Extreme Data (Dr. Julian Kunkel), Virtual, Georg-August-Universität Göttingen, 2020-12-18 Presentation
A Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis (Dr. Julian Kunkel), CHPC Conference, CHPC Conference, 2020-12-02 Presentation
The Virtual Institute for I/O (Dr. Julian Kunkel), IO500 Release Supercomputing Conference 2020, Virtual, 2020-11-18 Presentation
Beyond OpenSource Software – The Open Source Specialist Group (Dr. Julian Kunkel), BCS Open Source Specialist Group Meeting, Virtual, 2020-11-10 Presentation
Beyond OpenSource Software (Dr. Julian Kunkel), Hacktoberfest, Virtual, 2020-10-20 Presentation
Open HPC Certification and Relationship to OSS (Dr. Julian Kunkel), BCS Open Source Specialist Group Meeting, Virtual, 2020-10-15 Presentation
Welcome to the Summer School on Effective HPC for Climate and Weather (Dr. Julian Kunkel), BCS Open Source Specialist Group Meeting, Virtual, 2020-08-24 Presentation Video
Welcome to the HPC IODC workshop (Dr. Julian Kunkel), HPC IODC Workshop, Virtual, 2020-06-25 Presentation Video
Data Systems at Scale in Climate and Weather: Activities in the ESiWACE Project (Dr. Julian Kunkel), HPC IODC Workshop, Virtual, 2020-06-25 Presentation Video
Open Source Software for Scientific and Parallel Computing (Dr. Julian Kunkel), BCS Open Source Specialist Group Meeting, Virtual, 2020-06-11 Presentation Video
Data-Centric IO: Potential for Climate/Weather (Dr. Julian Kunkel), 6th ENES HPC Workshop, Virtual/Hamburg, Germany, 2020-05-29 Presentation
Progress of WP4: Data at Scale (Dr. Julian Kunkel), ESiWACE General Assembly, Virtual/Hamburg, Germany, 2020-05-27 Presentation
About the HPC Certification Forum (Dr. Julian Kunkel), HPC Certification Workshop, Virtual, 2020-05-20 Presentation Video
About the HPC Certification Forum (Dr. Julian Kunkel), HPC Certification Workshop, Virtual, 2020-05-18 Presentation Video
Toward Next Generation Interfaces for Exploiting Workflows (Dr. Julian Kunkel), SIG IO UK, University of Reading, Reading, UK, 2020-04-23 Presentation Video
Potential of I/O-Aware Workflows in Climate and Weather (Dr. Julian Kunkel), Supercomputing Frontiers Europe, Virtual/Warshaw Poland, 2020-03-25 Presentation
Challenges and Approaches for Extreme Data Processing (Dr. Julian Kunkel), EPSRC Centre for Doctoral Training Mathematics of Planet Earth, University of Reading, Reading, UK, 2020-03-11 Presentation

Smarter Management using Metadata and Workflow Expertise (Dr. Julian Kunkel), BoF: Knowledge Is Power: Unleashing the Potential of Your Archives Through Metadata, Supercomputing, Denver, USA, 2019-11-21 Presentation
Tracking User-Perceived I/O Slowdown via Probing (Dr. Julian Kunkel), BoF: Analyzing Parallel I/O, Supercomputing, Denver, USA, 2019-11-20 Presentation
The Virtual Institute of I/O (Dr. Julian Kunkel), BoF: The IO500 and The Virtual Institute of I/O, Supercomputing, Denver, USA, 2019-11-19 Presentation
IO500 (George Markomanolis, John Bent, Dr. Julian Kunkel, Jay Lofstead), BoF: The IO500 and The Virtual Institute of I/O, Supercomputing, Denver, USA, 2019-11-19 Presentation
Exploiting Different Storage Types with the Earth-System Data Middleware (Dr. Julian Kunkel), Parallel Data Systems Workshop, Supercomputing, Denver, USA, 2019-11-18 Presentation
Contributing HPC Skills to the HPC Certification Forum (Dr. Julian Kunkel), BPHTE19 Workshop, Supercomputing, Denver, USA, 2019-11-17 Presentation
Using Deep Learning to Identify Atmospheric Features (Dr. Julian Kunkel), 1st Artificial Intelligence for Copernicus Workshop, ECMWF, Reading, UK, 2019-11-06 Presentation
OpenSource Software (Dr. Julian Kunkel), Hacktoberfest, University of Reading, Reading, UK, 2019-10-27 Presentation
The Earth-System Data Middleware: An Approach for Heterogeneous Storage Infrastructure (Dr. Julian Kunkel), SPPEXA Final Symposium, Dresden, Germany, 2019-10-23 Presentation
Scientific Data Compression with SCIL (Dr. Julian Kunkel), SPPEXA Final Symposium, Dresden, Germany, 2019-10-23 Presentation
Utilizing Heterogeneous Storage Infrastructures via the Earth-System Data Middleware (Dr. Julian Kunkel), NEXTGenIO Workshop on applications of NVRAM storage to exascale I/O, ECMWF, Reading, Germany, 2019-09-27 Presentation
Data-Centric I/O and Next Generation Interfaces (Dr. Julian Kunkel), HPC IODC Workshop, ISC HPC, Frankfurt, Germany, 2019-06-20 Presentation
Tracking User-Perceived I/O Slowdown via Probing (Dr. Julian Kunkel), HPC IODC Workshop, ISC HPC, Frankfurt, Germany, 2019-06-20 Presentation
One Year HPC Certification Forum in Retrospective (Dr. Julian Kunkel), Workshop on HPC Education and Training for Emerging Technologies (HETET19), ISC HPC, Frankfurt, Germany, 2019-06-20 Presentation
The goldilocks node: getting the RAM just right (Dr. Julian Kunkel), BoF: Data-Centric I/O, ISC HPC, Frankfurt, Germany, 2019-06-19 Presentation
High-Level Workflows – Potential for Innovation? The NGI Initiative and More (Dr. Julian Kunkel), BoF: Data-Centric I/O, ISC HPC, Frankfurt, Germany, 2019-06-19 Presentation
IO-500 (George Markomanolis, John Bent, Jay Lofstead, Dr. Julian Kunkel), BoF: The IO-500 and the Virtual Institute for IO, ISC HPC, Frankfurt, Germany, 2019-06-18 Presentation
The Virtual Institute for IO (Dr. Julian Kunkel), BoF: The IO-500 and the Virtual Institute for IO, ISC HPC, Frankfurt, Germany, 2019-06-18 Presentation
The HPC Certification Program (Dr. Julian Kunkel), BoF: International HPC Certification Program, ISC HPC, Frankfurt, Germany, 2019-06-18 Presentation
Fighting the Data Deluge with Data-Centric Middleware (Dr. Julian Kunkel), PASC Minisymposium: The Exabyte Data Challenge, Zürich, Switzerland, 2019-06-14 Presentation
The importance of AI for high-performance I/O (Dr. Julian Kunkel), BSSG Open source AI workshop, University of Reading, UK, 2019-04-05 Presentation
Strategic Planning Agenda (Dr. Julian Kunkel), ACES Strategy Meeting, Reading, UK, 2019-03-25 Presentation
ESiWACE WP4: Highlights, challenges and outlook (Dr. Julian Kunkel), ESiWACE General Assembly, Hamburg, Germany, 2019-03-11 Presentation
The HPC Certification Program (Dr. Julian Kunkel), HPC-SIG meeting, London, UK, 2019-02-13 Presentation
Challenges and Approaches for Extreme Data Processing (Dr. Julian Kunkel), , Köln, Germany, 2019-01-14 Presentation

Opportunities for Integrating I/O Capabilities with Cylc (Dr. Julian Kunkel), Cylc Weather User Group; Supercomputing 2018, Dallas, USA, 2018-11-15 Presentation
The HPC Certification Program (Dr. Julian Kunkel), BoF: HPC Certification Program; Supercomputing 2018, Dallas, USA, 2018-11-15 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
Using Benchmarks to Understand Performance Behavior (Dr. Julian Kunkel), BoF: Analyzing Parallel I/O; Supercomputing 2018, Dallas, USA, 2018-11-13 Presentation
Towards an HPC Certification Program (Dr. Julian Kunkel), Fifth SC Workshop on Best Practices for HPC Training and Education; Supercomputing 2018, Dallas, USA, 2018-11-12 Presentation
Status of WP4: Exploitability (Dr. Julian Kunkel, Bryan N. Lawrence, Jakob Luettgau, 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
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), WOPSSS, Frankfurt, Germany, 2018-06-28 Presentation
Cost and Performance Modeling for Earth System Data Management and Beyond (Dr. Julian Kunkel), 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
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
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
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
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
Fortran Test Generator: Automatic and Flexible Unit Test Generation for Legacy HPC Code (Dr. Julian Kunkel), ISC HPC, Poster session, Frankfurt, Germany, 2017-06-20
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
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
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
BoF: VI4IO: The I/O Community Hosting the High-Performance Storage List (Dr. Julian Kunkel), ISC High Performance, Frankfurt, Germany, 2016-06-15 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

WP2: Efficient input/output of very large data sets (Dr. Julian Kunkel), Bull Cooperation Kickoff, Germany, 2015-12-02
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
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
I/O at the German Climate Computing Center (Dr. Julian Kunkel), International Supercomputing Conference, Frankfurt, Germany, 2015-07-16 Presentation
Predicting Performance of Non-Contiguous I/O with Machine Learning (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

Open source vehicle ECU diagnostics and testing platform, Ashcon Mohseninia (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, 2021-04-29, Thesis BibTeX

Beamer Slide Composition, Joseph Dyer (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, 2019-06-09, Thesis BibTeX
Recognition of Company Mergers Using Interactive Labeling and Machine Learning Methods, Anne Lorenz (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, Doris Birkefeld, 2019-05-08, Thesis BibTeX
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

All publications as BibTex

Dr. Julian Kunkel

Biography

Research Interests

Projects

Advisory roles

Editorial roles

Programm committee membership

Journal review duties

Event organization

Other responsibilities

Teaching

Autumn Term 2021

Autumn Term 2020

Spring Term 2020

Autumn Term 2019

Spring Term 2019

Autumn Term 2018

Summer Term 2018

Wintersemester 2017/2018

Sommersemester 2017

Wintersemester 2016/2017

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Wintersemester 2015/2016

Sommersemester 2015

Wintersemester 2014/2015

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Wintersemester 2011/2012

Sommersemester 2011

Wintersemester 2010/2011

Sommersemester 2010

Wintersemester 2009/2010

Sommersemester 2009

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Sommersemester 2008

Wintersemester 2007/2008

Theses

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To appear

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2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

Talks

2021

2020

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2015

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2009

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Supervised Theses

2021

2019

2018

2017