Dr. Julian Kunkel

juliankunkel.jpg

E-mailjulian.kunkel@gwdg.de
PGP1468 1A86 A908 D77E B40F 45D6 2B15 73A5 9D39 A28E
AddressRZGö, Burckhardtweg 4, Georg-August Universität Göttingen, room 4.111
Telephone+49 551/39-30144

Biography

Dr. Kunkel is a Professor in High-Performance Computing at the University of Göttingen, a Deputy Head of the GWDG and group leader of the working group Computing. 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.

Research Interests

  • 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

Projects

Advisory roles

  • 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)

Editorial roles

  • 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

Programm committee membership

Journal review duties

  • 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)

Event organization

Other responsibilities

  • 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.org
  • 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

Teaching

Autumn Term 2024

Summer Term 2024

Autumn Term 2023

Summer Term 2023

Autumn Term 2022

Summer Term 2022

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

Sommersemester 2016

Wintersemester 2015/2016

Sommersemester 2015

Wintersemester 2014/2015

Sommersemester 2014

Wintersemester 2013/2014

Sommersemester 2013

Wintersemester 2012/2013

Sommersemester 2012

Wintersemester 2011/2012

Sommersemester 2011

Wintersemester 2010/2011

Sommersemester 2010

Wintersemester 2009/2010

Sommersemester 2009

Wintersemester 2008/2009

Sommersemester 2008

Wintersemester 2007/2008

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

Open Thesis Topics

Theses

  • 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

Publications

  • \myPub{2024}{HOSHMAND: Accelerated AI-Driven Scheduler Emulating Conventional Task Distribution Techniques for Cloud Workloads}{Michael Bidollahkhani, Aasish Kumar Sharma, Julian Kunkel}{IEEE Computers, Software, and Applications Conference, pp. 1-8, IEEE, COMPSAC 2024}
  • \myPub{}{Deployment of an HPC-Accelerated Research Data Management System: Exemplary Workflow in HeartAndBrain Study}{V. Telzki, H. tom Wörden, F. Spreckelsen, Hendrik Nolte, Julian Kunkel, U. Parlitz, S. Luther, M. Uecker, M. Bähr}{Poster, Biosignals Workshop, Göttingen}
  • \myPub{}{Revolutionizing system reliability: The role of AI in predictive maintenance strategies}{Michael Bidollahkhani, Julian Kunkel}{IARIA CloudComputing 2024 Conference, pp. 1-9, Venice, Italy, ISSN: 2308-4294. ISBN: 978-1-68558-156-5}
  • \myPub{2023}{Transfer Learning Workflow for High-Quality I/O Bandwidth Prediction with Limited Data}{Dmytro Povaliaiev, Radita Liem, Julian Kunkel, Jay Lofstead, Philip Carns}{Poster, SC 2023, Denver, Colorado, USA}
  • \myPub{}{Mango-IO: I/O Metrics Consistency Analysis}{Radita Liem, Sebastian Oeste, Jay Lofstead, Julian Kunkel}{IEEE International Conference on Cluster Computing Workshops (CLUSTER Workshops) (2023), Santa Fe, NM, USA}
  • \myPub{}{TCDetect: A New Method of Detecting the Presence of Tropical Cyclones Using Deep Learning}{Daniel Galea, Julian Kunkel, Bryan N. Lawrence}{In American Meteorological Society (AMS)}
  • \myPub{}{Governance-Centric Paradigm: Overcoming the Information Gap between Users and Systems by Enforcing Data Management Plans on HPC-Systems}{Hendrik Nolte, Julian Kunkel}{INFOCOMP (13), pp. 13–20, INFOCOMP, ISBN: 978-1-68558-073-5}
  • \myPub{}{DECICE: Device-Edge-Cloud Intelligent Collaboration Framework}{Julian Kunkel, Christian Boehme, Jonathan Decker, Fabrizio Magugliani, Dirk Pleiter, Bastian Koller, Karthee Sivalingam, Sabri Pllana, Alexander Nikolov, Mujdat Soyturk, Christian Racca, Andrea Bartolini}{ACM, Computing Frontiers, ISBN: 979-8-4007-0140-5/23/05}
  • \myPub{}{Secure HPC: A Workflow Providing a Secure Partition on an HPC System}{Hendrik Nolte, Nicolai Spicher, Andrew Russel, Tim Ehlers, Sebastian Krey, Dagmar Krefting, Julian Kunkel}{In Future Generation Computer Systems (141), pp. 677–691}
  • \myPub{2022}{Secure Authorization for RESTful HPC Access}{Mohammad Hossein Biniaz, Sven Bingert, Christian Köhler, Hendrik Nolte, Julian Kunkel}{INFOCOMP 2022, The Twelfth Internation Conference on Advanced Communications and Computation (12), pp. 12–17, INFOCOMP, INFOCOMP, ISBN: 978-1-61208-961-4}
  • \myPub{}{Performance Evaluation of Open-Source Serverless Platforms for Kubernetes}{Jonathan Decker, Piotr Kasprzak, Julian Kunkel}{In Algorithms, MDPI, ISSN: 1999-4893}
  • \myPub{}{Road Intersection Coordination Scheme for Mixed Traffic (Human-Driven and Driverless Vehicles): A Systematic Review}{Ekene F. Ozioko, Julian Kunkel, Frederic Stahl}{In Journal of Advanced Transportation, Hindawi}
  • \myPub{}{Improve the Deep Learning Models in Forestry Based on Explanations and Expertise}{Ximeng Cheng, Ali Doosthosseini, Julian Kunkel}{In Frontiers in Plant Science, Schloss Dagstuhl – Leibniz-Zentrum für Informatik, ISSN: 1664-462X}
  • \myPub{}{A Secure Workflow for Shared HPC Systems}{Hendrik Nolte, Simon Hernan Sarmiento Sabater, Tim Ehlers, Julian Kunkel}{In 2022 22nd IEEE International Symposium on Cluster, Cloud and Internet Computing (CCGrid), 2022 22nd IEEE International Symposium on Cluster, Cloud and Internet Computing (CCGrid) (22), pp. 965–974, IEEE, CCGrid}
  • \myPub{}{Predicting Stock Price Changes Based on the Limit Order Book: A Survey}{Ilia Zaznov, Julian Kunkel, Alfonso Dufour, Atta Badii}{In Mathematics, Series: 1234, MDPI, ISSN: 2227-7390}
  • \myPub{}{Assessing IO500 Benchmark for Performance Engineering Guidance}{Radita Liem, Geral Lofstead, Julian Kunkel}{USDOE National Nuclear Security Administration (NNSA), SNL-NM, United States}
  • \myPub{2021}{User-Centric System Fault Identification Using IO500 Benchmark}{Radita Liem, Dmytro Povaliaiev, Jay Lofstead, Julian Kunkel, Christian Terboven}{In In 2021 IEEE/ACM Sixth International Parallel Data Systems Workshop (PDSW), pp. 35-40, IEEE, International Parallel Data Systems Workshop (PDSW), St. Louis}
  • \myPub{}{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 (12761), pp. 161–173, Springer, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-90539-2}
  • \myPub{}{Understanding I/O Behavior in Scientific and Data-Intensive Computing (Dagstuhl Seminar 21332)}{Philip Carns, Julian Kunkel, Kathryn Mohror, Martin Schulz}{In Dagstuhl Reports, pp. 16–75, Schloss Dagstuhl – Leibniz-Zentrum für Informatik, ISSN: 2192-5283}
  • \myPub{}{Analyzing the Performance of the S3 Object Storage API for HPC Workloads}{Frank Gadban, Julian Kunkel}{In Applied Sciences, Series: 11, MDPI}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{2020}{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, Springer, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-59851-8, ISSN: 1611-3349}
  • \myPub{}{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, Springer, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-59851-8, ISSN: 1611-3349}
  • \myPub{}{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, Springer International Publishing, ISBN: 978-3-030-47956-5, ISSN: 2197-7100}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{}{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, Springer, COLOC - Workshop on Data Locality, Göttingen, Germany, ISBN: 978-3-030-48340-1, ISSN: 1611-3349}
  • \myPub{}{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}
  • \myPub{}{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, ISBN: 978-0-12-819154-5}
  • \myPub{}{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, Publishing Center of South Ural State University, ISSN: 2313-8734}
  • \myPub{}{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, ISSN: 2153-4136}
  • \myPub{}{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, ISSN: 2153-4136}
  • \myPub{2019}{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, Springer, P^3MA workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, HPC IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-34356-9, ISSN: 1611-3349}
  • \myPub{}{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}
  • \myPub{}{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, CEUR-WS.org, LWDA 2019, Berlin, Germany}
  • \myPub{}{The Virtual Institute for I/O and the IO-500}{Julian Kunkel, Jay Lofstead, John Bent, George Markomanolis}{Poster, ISC High Performance 2019, Frankfurt, Germany}
  • \myPub{}{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}{Poster, ISC High Performance, Frankfurt, Germany}
  • \myPub{}{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}{Poster, ISC High Performance, Frankfurt, Germany}
  • \myPub{}{International HPC Certification Program}{Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, Lev Lafayette, Anja Gerbes, Waseem Kamleh, Sharan Kalwan}{Poster, ISC High Performance, Frankfurt, Germany}
  • \myPub{}{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, Elsevier, ISSN: 2210-5379}
  • \myPub{}{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}
  • \myPub{}{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, SBAC-PAD 2018, Lyon, France, ISBN: 978-1-5386-7769-8, ISSN: 1550-6533}
  • \myPub{}{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, PDSW-DISCS, Dallas, Texas, ISBN: 978-1-7281-0192-7}
  • \myPub{}{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, Forschungszentrum Jülich, Extreme Data Workshop, Jülich, Germany, ISBN: 978-3-95806-392-1, ISSN: 1868-8489}
  • \myPub{}{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, Springer, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, P3MA workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, WOPSSS workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, WOPSSS workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349}
  • \myPub{}{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, Springer, HPC-IODC workshop, ISC HPC, Frankfurt, Germany, ISBN: 978-3-030-02465-9, ISSN: 1611-3349}
  • \myPub{}{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}
  • \myPub{}{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, WPMVP-2019, Washington DC, USA, ISBN: 978-1-4503-6291-7/19/02}
  • \myPub{2018}{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, HPCS 2018, Orleans, France, ISBN: 978-1-5386-7879-4}
  • \myPub{}{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}
  • \myPub{}{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}{Poster, ISC HPC, Frankfurt, Germany}
  • \myPub{}{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}{Poster, ISC HPC, Frankfurt, Germany}
  • \myPub{}{International HPC Certification Program}{Julian Kunkel, Kai Himstedt, Weronika Filinger, Jean-Thomas Acquaviva, William Jalby, Lev Lafayette}{Poster, ISC HPC, Frankfurt, Germany}
  • \myPub{}{The Virtual Institute for I/O and the IO-500}{Julian Kunkel, Jay Lofstead, John Bent}{Poster, ISC HPC, Frankfurt, Germany}
  • \myPub{}{A user-controlled GGDML Code Translation Technique for Performance Portability of Earth System Models}{Nabeeh Jumah, Julian Kunkel}{Poster, ISC HPC, Frankfurt, Germany}
  • \myPub{}{Automatic Profiling for Climate Modeling}{Anja Gerbes, Nabeeh Jumah, Julian Kunkel}{Poster, Euro LLVM, Bristol, United Kingdom}
  • \myPub{}{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, Publishing Center of South Ural State University}
  • \myPub{2017}{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}
  • \myPub{}{Adaptive Tier Selection for NetCDF and HDF5}{Jakob Lüttgau, Eugen Betke, Olga Perevalova, Julian Kunkel, Michael Kuhn}{Poster, SC17, Denver, CO, USA}
  • \myPub{}{Toward Decoupling the Selection of Compression Algorithms from Quality Constraints}{Julian Kunkel, Anastasia Novikova, Eugen Betke}{Poster, SC17, Denver, CO, USA}
  • \myPub{}{Understanding Hardware and Software Metrics with respect to Power Consumption}{Julian Kunkel, Manuel F. Dolz}{In Sustainable Computing: Informatics and Systems, Series: Sustainable Computing, Elsevier, ISSN: 2210-5379}
  • \myPub{}{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, Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6}
  • \myPub{}{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, Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6}
  • \myPub{}{Icosahedral Modeling with GGDML}{Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif}{Poster, DKRZ user workshop 2017, Hamburg, Germany}
  • \myPub{}{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}
  • \myPub{}{The Virtual Institute for I/O and the IO-500}{Julian Kunkel, Jay Lofstead, John Bent}{Poster, ISC High Performance 2017, Frankfurt, Germany}
  • \myPub{}{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}{Poster, ISC 2017, Germany, Frankfurt}
  • \myPub{}{Towards Performance Portability for Atmospheric and Climate Models with the GGDML DSL}{Nabeeh Jumah, Julian Kunkel, Günther Zängl, Hisashi Yashiro, Thomas Dubos, Yann Meurdesoif}{Poster, ISC 2017, Germany, Frankfurt}
  • \myPub{}{Performance Conscious HPC (PeCoH)}{Julian Kunkel, Michael Kuhn, Thomas Ludwig, Matthias Riebisch, Stephan Olbrich, Hinnerk Stüben, Kai Himstedt, Hendryk Bockelmann, Markus Stammberger}{Poster, ISC High Performance 2017, Frankfurt, Germany}
  • \myPub{}{Enhanced Adaptive Compression in Lustre}{Anna Fuchs, Michael Kuhn, Julian Kunkel, Thomas Ludwig}{Poster, ISC High Performance 2017, Frankfurt, Germany}
  • \myPub{}{FortranTestGenerator: Automatic and Flexible Unit Test Generation for Legacy HPC Code}{Christian Hovy, Julian Kunkel}{Poster, ISC High Performance 2017, Frankfurt}
  • \myPub{}{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}
  • \myPub{}{SFS: A Tool for Large Scale Analysis of Compression Characteristics}{Julian Kunkel}{Research Papers (4), Research Group: Scientific Computing, University of Hamburg}
  • \myPub{}{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, ISBN: 978-3-924330-57-6}
  • \myPub{}{Intelligent Selection of Compiler Options to Optimize Compile Time and Performance}{Anja Gerbes, Julian Kunkel, Nabeeh Jumah}{Poster, Euro LLVM, Saarbrücken}
  • \myPub{}{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, Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6}
  • \myPub{}{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, Springer, ISC High Performance, Frankfurt, Germany, ISBN: 978-3-319-67629-6}
  • \myPub{}{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, Springer, PaCT, Nizhni Novgorod, Russia, ISBN: 978-3-319-62932-2}
  • \myPub{2016}{Analyzing Data Properties using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features}{Julian Kunkel}{Poster, ISC High Performance 2016, Frankfurt}
  • \myPub{}{Predicting I/O-performance in HPC using Artificial Neural Networks}{Jan Fabian Schmid, Julian Kunkel}{Poster, ISC High Performance 2015, Frankfurt}
  • \myPub{}{Interaktiver C-Programmierkurs, ICP}{Julian Kunkel, Jakob Lüttgau}{In Synergie, Fachmagazin für Digitalisierung in der Lehre (2), pp. 74–75}
  • \myPub{}{Modeling and Simulation of Tape Libraries for Hierarchical Storage Systems}{Jakob Lüttgau, Julian Kunkel}{Poster, SC16, Salt Lake City, Utah, USA}
  • \myPub{}{Utilizing In-Memory Storage for MPI-IO}{Julian Kunkel, Eugen Betke}{Poster, SC16, Salt Lake City, Utah, USA}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{}{Data Compression for Climate Data}{Michael Kuhn, Julian Kunkel, Thomas Ludwig}{In Supercomputing Frontiers and Innovations, Series: Volume 3, Number 1, pp. 75–94}
  • \myPub{}{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, Springer, ISC-HPC 2017, Frankfurt, Germany, ISBN: 978-3-319-46079-6}
  • \myPub{}{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}
  • \myPub{2015}{Interaktiver C Kurs (ICP)}{Julian Kunkel, Thomas Ludwig, Jakob Lüttgau, Dion Timmermann, Christian Kautz, Volker Skwarek}{Poster, Campus Innovation 2015, Hamburg}
  • \myPub{}{Using Machine Learning to Predict the Performance of Non-Contiguous I/O}{Julian Kunkel, Michaela Zimmer, Eugen Betke}{Poster, Frankfurt, Germany}
  • \myPub{}{Advanced Data Sieving for Non-Contigouous I/O}{Enno Zickler, Julian Kunkel}{Poster, Frankfurt, Germany}
  • \myPub{}{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}
  • \myPub{}{Identifying Relevant Factors in the I/O-Path using Statistical Methods}{Julian Kunkel}{Research Papers (3), Research Group: Scientific Computing, University of Hamburg}
  • \myPub{}{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}
  • \myPub{}{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, ISC High Performance, Frankfurt, ISSN: 0302-9743}
  • \myPub{}{Speicherung großer Datenmengen und Energieeffizienz}{Thomas Ludwig, Manuel Dolz, Michael Kuhn, Julian Kunkel, Hermann Lenhart}{Max-Planck-Gesselschaft}
  • \myPub{2014}{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}{Poster, ISC'14 Leipzig}
  • \myPub{}{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}
  • \myPub{}{Whitepaper: E10 – Exascale IO}{Andre Brinkmann, Toni Cortes, Hugo Falter, Julian Kunkel, Sai Narasimhamurthy}{}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{}{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, Lecture Notes in Computer Science, ISC'14, Leipzig, ISBN: 978-3-319-07517-4}
  • \myPub{2013}{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}
  • \myPub{}{Source-to-Source Translation for Climate Models}{Raul Torres, Leonidas Lindarkis, Julian Kunkel}{Poster, International Supercomputing Conference 2013, Leipzig, Germany}
  • \myPub{}{Using Simulation to Validate Performance of MPI(-IO) Implementations}{Julian Kunkel}{In Supercomputing, Lecture Notes in Computer Science (7905), pp. 181–195, Springer, ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743}
  • \myPub{}{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, Springer, ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743}
  • \myPub{}{Towards Self-optimization in HPC I/O}{Michaela Zimmer, Julian Kunkel, Thomas Ludwig}{In Supercomputing, Lecture Notes in Computer Science (7905), pp. 422–434, Springer, ISC 2013, Leipzig, Germany, ISBN: 978-3-642-38749-4, ISSN: 0302-9743}
  • \myPub{}{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}
  • \myPub{}{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}
  • \myPub{}{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., ISSN: 1865-2034}
  • \myPub{2012}{A Study on Data Deduplication in HPC Storage Systems}{Dirk Meister, Jürgen Kaiser, Andre Brinkmann, Michael Kuhn, Julian Kunkel, Toni Cortes}{In Proceedings of the ACM/IEEE Conference on High Performance Computing (SC), IEEE Computer Society, SC'12, Salt Lake City, USA}
  • \myPub{}{Simulating parallel programs on application and system level}{Julian Kunkel}{In Computer Science – Research and Development, Series: Volume 28 Number 2-3, Springer, ISSN: 1865-2042}
  • \myPub{}{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, ISBN: 978-1-4398-5040-4}
  • \myPub{}{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), Institute for Systems Engineering and Automation, PDP 2012, Garching, Germany, ISBN: 978-3-902457-31-8}
  • \myPub{}{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), Institute for Systems Engineering and Automation, PDP 2012, Garching, Germany, ISBN: 978-3-902457-31-8}
  • \myPub{}{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, IEEE Computer Society, PDP 2012, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192}
  • \myPub{}{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, IEEE Computer Society, PDP 2012, Garching, Germany, ISBN: 978-0-7695-4633-9, ISSN: 1066-6192}
  • \myPub{}{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, IOS Press, ParCo 2011, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452}
  • \myPub{}{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, IOS Press, ParCo 2011, Ghent, Belgium, ISBN: 978-1-61499-040-6, ISSN: 0927-5452}
  • \myPub{2011}{HDTrace – A Tracing and Simulation Environment of Application and System Interaction}{Julian Kunkel}{Research Papers (2), Research Group: Scientific Computing, University of Hamburg}
  • \myPub{}{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, Springer}
  • \myPub{2010}{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}
  • \myPub{}{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}
  • \myPub{}{Benchmarking Application I/O in the Community}{Julian Kunkel, Olga Mordvinova, Dennis Runz, Michael Kuhn, Thomas Ludwig}{Poster, International Supercomputing Conference, Hamburg, Germany}
  • \myPub{}{Simulation of Cluster Power Consumption and Energy-to-Solution}{Timo Minartz, Julian Kunkel, Thomas Ludwig}{Poster, International Conference on Energy-Efficient Computing and Networking, Passau, Germany}
  • \myPub{}{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, ISSN: 1860-7314}
  • \myPub{}{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, Springer, ISSN: 1865-2034}
  • \myPub{}{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, Springer, ISSN: 1865-2034}
  • \myPub{}{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, ISSN: 1877-0509}
  • \myPub{}{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}
  • \myPub{2009}{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, PDCAT-09, Higashi Hiroshima, Japan, ISBN: 978-0-7695-3914-0}
  • \myPub{}{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, GRID-09, Banff, Alberta, Canada, ISBN: 978-1-4244-5148-7}
  • \myPub{}{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., ISSN: 1532-0626}
  • \myPub{}{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, EuroPVM/MPI-09, Espoo, Finland, ISBN: 978-3-642-03769-6}
  • \myPub{}{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, IPDPS-09, Rome, Italy, ISBN: 978-1-4244-3751-1}
  • \myPub{}{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}{Poster, German Symposium on Systems Biology 2009, Heidelberg, Germany}
  • \myPub{2008}{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, Euro-Par-08, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0}
  • \myPub{}{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, Euro-Par-08, Las Palmas de Gran Canaria, Spain, ISBN: 978-3-540-85450-0}
  • \myPub{2007}{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, PDP-07, Napoli, Italy, ISBN: 0-7695-2784-1}
  • \myPub{}{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, Springer, EuroPVM/MPI-07, Paris, France, ISBN: 978-3-540-75415-2}
  • \myPub{2006}{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, Springer, EuroPVM/MPI-06, Bonn, Germany, ISBN: 3-540-39110-X}

Talks

  • \myPub{2021}{Input/Output and Middleware}{Summer School on Effective HPC for Climate and Weathe}{Virtual}
  • \myPub{}{Lifting the user I/O abstraction to workflow level a possibility or in vain?}{Dagstuhl Seminar}{Schloß Dagstuhl}
  • \myPub{}{Data Systems at Scale in Climate and Weather}{Hidalgo Workshop}{Virtual}
  • \myPub{}{A Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis}{HPC IODC Workshop}{Virtual}
  • \myPub{}{The Virtual Institute for I/O}{IO500 Release ISC 2021}{ISC HPC}
  • \myPub{}{Data-Centric Computing for the Next Generation}{BoF session}{ISC HPC 2021}
  • \myPub{}{The HPC Certification Forum in 2021}{}{HPC Certification Forum Annual Meeting}
  • \myPub{2020}{Smart Processing for Extreme Data}{Virtual}{Georg-August-Universität Göttingen}
  • \myPub{}{A Workflow for Identifying Jobs with Similar I/O Behavior Utilizing Time Series Analysis}{CHPC Conference}{CHPC Conference}
  • \myPub{}{The Virtual Institute for I/O}{IO500 Release Supercomputing Conference 2020}{Virtual}
  • \myPub{}{Beyond OpenSource Software – The Open Source Specialist Group}{BCS Open Source Specialist Group Meeting}{Virtual}
  • \myPub{}{Beyond OpenSource Software}{Hacktoberfest}{Virtual}
  • \myPub{}{Open HPC Certification and Relationship to OSS}{BCS Open Source Specialist Group Meeting}{Virtual}
  • \myPub{}{Welcome to the Summer School on Effective HPC for Climate and Weather}{BCS Open Source Specialist Group Meeting}{Virtual}
  • \myPub{}{Welcome to the HPC IODC workshop}{HPC IODC Workshop}{Virtual}
  • \myPub{}{Data Systems at Scale in Climate and Weather: Activities in the ESiWACE Project}{HPC IODC Workshop}{Virtual}
  • \myPub{}{Open Source Software for Scientific and Parallel Computing}{BCS Open Source Specialist Group Meeting}{Virtual}
  • \myPub{}{Data-Centric IO: Potential for Climate/Weather}{6th ENES HPC Workshop}{Virtual/Hamburg, Germany}
  • \myPub{}{Progress of WP4: Data at Scale}{ESiWACE General Assembly}{Virtual/Hamburg, Germany}
  • \myPub{}{About the HPC Certification Forum}{HPC Certification Workshop}{Virtual}
  • \myPub{}{About the HPC Certification Forum}{HPC Certification Workshop}{Virtual}
  • \myPub{}{Toward Next Generation Interfaces for Exploiting Workflows}{SIG IO UK}{University of Reading, Reading, UK}
  • \myPub{}{Potential of I/O-Aware Workflows in Climate and Weather}{Supercomputing Frontiers Europe}{Virtual/Warshaw Poland}
  • \myPub{}{Challenges and Approaches for Extreme Data Processing}{EPSRC Centre for Doctoral Training Mathematics of Planet Earth}{University of Reading, Reading, UK}
  • \myPub{2019}{Smarter Management using Metadata and Workflow Expertise}{BoF: Knowledge Is Power: Unleashing the Potential of Your Archives Through Metadata}{Supercomputing, Denver, USA}
  • \myPub{}{Tracking User-Perceived I/O Slowdown via Probing}{BoF: Analyzing Parallel I/O}{Supercomputing, Denver, USA}
  • \myPub{}{The Virtual Institute of I/O}{BoF: The IO500 and The Virtual Institute of I/O}{Supercomputing, Denver, USA}
  • \myPub{}{Exploiting Different Storage Types with the Earth-System Data Middleware}{Parallel Data Systems Workshop}{Supercomputing, Denver, USA}
  • \myPub{}{Contributing HPC Skills to the HPC Certification Forum}{BPHTE19 Workshop}{Supercomputing, Denver, USA}
  • \myPub{}{Using Deep Learning to Identify Atmospheric Features}{1st Artificial Intelligence for Copernicus Workshop}{ECMWF, Reading, UK}
  • \myPub{}{OpenSource Software}{Hacktoberfest}{University of Reading, Reading, UK}
  • \myPub{}{The Earth-System Data Middleware: An Approach for Heterogeneous Storage Infrastructure}{SPPEXA Final Symposium}{Dresden, Germany}
  • \myPub{}{Scientific Data Compression with SCIL}{SPPEXA Final Symposium}{Dresden, Germany}
  • \myPub{}{Utilizing Heterogeneous Storage Infrastructures via the Earth-System Data Middleware}{NEXTGenIO Workshop on applications of NVRAM storage to exascale I/O}{ECMWF, Reading, Germany}
  • \myPub{}{One Year HPC Certification Forum in Retrospective}{Workshop on HPC Education and Training for Emerging Technologies (HETET19)}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{Data-Centric I/O and Next Generation Interfaces}{HPC IODC Workshop}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{Tracking User-Perceived I/O Slowdown via Probing}{HPC IODC Workshop}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{The goldilocks node: getting the RAM just right}{BoF: Data-Centric I/O}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{High-Level Workflows – Potential for Innovation? The NGI Initiative and More}{BoF: Data-Centric I/O}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{The Virtual Institute for IO}{BoF: The IO-500 and the Virtual Institute for IO}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{The HPC Certification Program}{BoF: International HPC Certification Program}{ISC HPC, Frankfurt, Germany}
  • \myPub{}{Fighting the Data Deluge with Data-Centric Middleware}{PASC Minisymposium: The Exabyte Data Challenge}{Zürich, Switzerland}
  • \myPub{}{The importance of AI for high-performance I/O}{BSSG Open source AI workshop}{University of Reading, UK}
  • \myPub{}{Strategic Planning Agenda}{ACES Strategy Meeting}{Reading, UK}
  • \myPub{}{ESiWACE WP4: Highlights, challenges and outlook}{ESiWACE General Assembly}{Hamburg, Germany}
  • \myPub{}{The HPC Certification Program}{HPC-SIG meeting}{London, UK}
  • \myPub{}{Challenges and Approaches for Extreme Data Processing}{}{Köln, Germany}
  • \myPub{2018}{Opportunities for Integrating I/O Capabilities with Cylc}{Cylc Weather User Group; Supercomputing 2018}{Dallas, USA}
  • \myPub{}{The HPC Certification Program}{BoF: HPC Certification Program; Supercomputing 2018}{Dallas, USA}
  • \myPub{}{The Virtual Institute for I/O}{BoF: The IO-500 and the Virtual Institute for I/O; Supercomputing 2018}{Dallas, USA}
  • \myPub{}{Using Benchmarks to Understand Performance Behavior}{BoF: Analyzing Parallel I/O; Supercomputing 2018}{Dallas, USA}
  • \myPub{}{Towards an HPC Certification Program}{Fifth SC Workshop on Best Practices for HPC Training and Education; Supercomputing 2018}{Dallas, USA}
  • \myPub{}{Status of WP4: Exploitability}{ESiWACE review meeting}{DKRZ, Hamburg, Germany}
  • \myPub{}{Introducing the HPC Certification Program}{SIGHPC Education – Webinar}{Internet}
  • \myPub{}{OpenSource Software}{Hacktoberfest}{Thames Tower, Reading, UK}
  • \myPub{}{PeCoH – Performance Conscious HPC: Status}{8. HPC-Status-Konferenz der Gauß-Allianz}{Erlangen, Germany}
  • \myPub{}{Overcoming Storage Issues of Earth-System Data with Intelligent Storage Systems}{18th Workshop on high performance computing in meteorology}{ECMWF, Reading, UK}
  • \myPub{}{RD&E in Compression}{NCAS Meeting}{Reading, UK}
  • \myPub{}{Challenges and Opportunities for I/O}{Gung Ho Networking Meeting}{Reading, UK}
  • \myPub{}{Understanding Metadata Latency with MDWorkbench}{WOPSSS}{Frankfurt, Germany}
  • \myPub{}{Cost and Performance Modeling for Earth System Data Management and Beyond}{HPC IODC Workshop}{Frankfurt, Germany}
  • \myPub{}{Community Development of Next Generation Semantic Interfaces}{Joint session of the HPC IODC Workshop and WOPSSS}{Frankfurt, Germany}
  • \myPub{}{The Virtual Institute of I/O}{BoF: The IO-500 and the Virtual Institute of I/O, ISC HPC}{Frankfurt, Germany}
  • \myPub{}{The Need for Next Generation Semantic Interfaces to Process Climate/Weather Workflows}{SIG IO UK}{University of Reading, UK}
  • \myPub{}{Towards Intelligent Storage Systems}{Computer Science Workshop}{University of Reading, UK}
  • \myPub{}{Exploiting the Heterogeneous Storage Landscape in a Data Center}{Per3s: Performance and Scalability of Storage Systems Workshop}{Rennes, France}
  • \myPub{2017}{Exploiting Weather and Climate Data at Scale (WP4)}{ESiWACE General Assembly}{Berlin, Germany}
  • \myPub{}{The Virtual Institute for I/O and the IO-500}{BoF: The Virtual Institute for I/O and the IO-500}{Denver, USA}
  • \myPub{}{Establishing the IO-500 Benchmark}{PDSW/DISC Workshop WiP session}{Denver, USA}
  • \myPub{}{Towards new storage interfaces – chance or curse?}{Workshop: Exascale I/O for Unstructured Grids}{DKRZ, Hamburg, Germany}
  • \myPub{}{Empowering Scientists with Domain Specific Languages}{SciCADE 2017}{Bath, UK}
  • \myPub{}{IO-500 Status}{Data Benchmarking Workshop}{LBNL, USA}
  • \myPub{}{Metadata Issues}{Data Benchmarking Workshop}{LBNL, USA}
  • \myPub{}{MPI-IO In-Memory Storage with the Kove XPD}{Workshop on Performance and Scalability of Storage Systems (WOPSSS)}{Frankfurt, Germany}
  • \myPub{}{Lustre at DKRZ}{ISC HPC, BoF: EOFS}{Frankfurt, Germany}
  • \myPub{}{Fortran Test Generator: Automatic and Flexible Unit Test Generation for Legacy HPC Code}{ISC HPC, Poster session}{Frankfurt, Germany}
  • \myPub{}{Decoupling the Selection of Compression Algorithms from Required Precision with the Scientific Compression Library (SCIL)}{ISC HPC, Poster session}{Frankfurt, Germany}
  • \myPub{}{BoF: The Virtual Institute for I/O and the IO-500}{ISC HPC}{Frankfurt, Germany}
  • \myPub{}{Research Achievements and Perspectives for HPC and Earth Science}{}{Reading, UK}
  • \myPub{}{Big Data Analytics}{DKRZ Tour “Computational Sciences in Engineering”}{Hamburg, Germany}
  • \myPub{}{Analysis of Input/Output Phenomena using Statistics and Machine Learning}{}{HAW, Hamburg}
  • \myPub{}{Visual Analytics}{}{HAW, Hamburg}
  • \myPub{}{Metadata/Small File Benchmarking and Status of the IO-500}{Workshop on Understanding I/O Performance Behavior (UIOP)}{DKRZ, Hamburg, Germany}
  • \myPub{}{Advanced Computation and I/O Methods for Earth-System Simulations Status update}{SPPEXA Annual Plenary Meeting}{Leibniz Supercomputing Centre, Munich, Germany}
  • \myPub{}{AIMES: Status of the Project}{AIMES Face-to-face Meeting}{Leibniz Supercomputing Centre, Munich, Germany}
  • \myPub{}{AIMES Status Report: University of Hamburg}{AIMES Face-to-face Meeting}{Leibniz Supercomputing Centre, Munich, Germany}
  • \myPub{2016}{BoF: The Virtual Institute for I/O and the IO-500}{Supercomputing Conference}{Salt Lake City, USA}
  • \myPub{}{Statistical File Characterization and Status Update: Monitoring at DKRZ}{BoF: Analyzing Parallel I/O, Supercomputing Conference}{Salt Lake City, USA}
  • \myPub{}{Middleware for Earth System Data}{PDSW-DISC Workshop}{Salt Lake City, USA}
  • \myPub{}{MPI-IO In-Memory Storage with the Kove XPD}{PDSW-DISC Workshop}{Salt Lake City, USA}
  • \myPub{}{Performance Conscious HPC (PeCoH) Kickoff}{PeCoH Kickoff}{Hamburg, Germany}
  • \myPub{}{Additional I/O Considerations}{Bull cooperation meeting}{Grenoble, France}
  • \myPub{}{Analyzing Data Properties Using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features}{HPC-IODC Workshop}{Frankfurt, Germany}
  • \myPub{}{Lustre at DKRZ}{Lustre BoF, ISC High Performance}{Frankfurt, Germany}
  • \myPub{}{Analyzing Data Properties Using Statistical Sampling Techniques – Illustrated on Scientific File Formats and Compression Features}{ISC High Performance}{Frankfurt, Germany}
  • \myPub{}{I/O Benchmarking}{JAMSTEC cooperation}{Hamburg, Germany}
  • \myPub{}{BoF: VI4IO: The I/O Community Hosting the High-Performance Storage List}{ISC High Performance}{Frankfurt, Germany}
  • \myPub{}{I/O Perspectives for Earth Science Data}{MPI-M/DKRZ joint I/O workshop}{Hamburg, Germany}
  • \myPub{}{Advanced Computation and I/O Methods for Earth-System Simulations (AIMES)}{SPPEXA annual symposium}{Munich, Germany}
  • \myPub{}{AIMES overview, contributions of WR to WPs}{AIMES kickoff meeting}{Munich, Germany}
  • \myPub{}{Compression (in HDF5) in the projects ICOMEX and AIMES}{Informal meeting}{Hamburg, Germany}
  • \myPub{2015}{WP2: Efficient input/output of very large data sets}{Bull Cooperation Kickoff}{Germany}
  • \myPub{}{Interaktiver C Kurs (ICP)}{Campus Innovation}{Hamburg, Germany}
  • \myPub{}{SIOX: A flexible approach}{BoF: Analyzing Parallel I/O, Supercomputing Conference}{Austin, USA}
  • \myPub{}{Monitoring plans at DKRZ}{BoF: Analyzing Parallel I/O, Supercomputing Conference}{Austin, USA}
  • \myPub{}{Future CS Trends and IO}{Max-Planck-Institute for Meteorology Retreat}{Germany}
  • \myPub{}{High-Performance I/O at Mistral}{DKRZ user workshop}{Hamburg, Germany}
  • \myPub{}{Mistral Supercomputer I/O}{CluStor Workshop}{Hamburg, Germany}
  • \myPub{}{Analyzing and Assessing I/O Performance}{CluStor Workshop}{Hamburg, Germany}
  • \myPub{}{Predicting Performance of Non-Contiguous I/O with Machine Learning}{International Supercomputing Conference}{Frankfurt, Germany}
  • \myPub{}{I/O at the German Climate Computing Center}{International Supercomputing Conference}{Frankfurt, Germany}
  • \myPub{}{Advanced Computation and I/O Methods for Earth-System Simulations (AIMES)}{SPPEXA applicant colloquium}{Bonn, Germany}
  • \myPub{}{Domain-specific Language Development}{Group seminar, University of Hamburg}{Hamburg, Germany}
  • \myPub{2014}{Challenges in HPC I/O}{University of Basel}{Basel, Switzerland}
  • \myPub{}{Monitoring Energy Consumption With SIOX – Autonomous Monitoring Triggered by Abnormal Energy Consumption}{Energy-Aware High Performance Computing Conference}{Dresden, Germany}
  • \myPub{}{The SIOX Architecture – Coupling Automatic Monitoring and Optimization of Parallel I/O}{International Supercomputing Conference}{Leipzig}
  • \myPub{}{Deficiencies in I/O and the Future with E10}{EOFS breakfast meeting, International Supercomputing Conference}{Leipzig, Germany}
  • \myPub{}{Exascale 10 – High-Level Architecture}{BoF: Towards Exascale I/O with E10, International Supercomputing Conference}{Leipzig, Germany}
  • \myPub{}{Introductions to the SIOX Architecture}{BoF: Autonomic I/O Optimization, International Supercomputing Conference}{Leipzig, Germany}
  • \myPub{}{Exascale 10 – High-Level Architecture}{CluStor I/O Workshop}{Hamburg, Germany}
  • \myPub{}{Advancing Independent Non-Contiguous I/O}{CluStor I/O Workshop}{Hamburg, Germany}
  • \myPub{}{Hochleistungsrechnen: Einblicke in Leistungsanalyse und Speichersysteme der Zukunft}{Ernst-Moritz-Arndt-Universität Greifswald}{Greifswald, Germany}
  • \myPub{}{I/O Interfaces Will Change – Chance or Curse for Programmers?}{ICOMEX project meeting}{Offenbach, Germany}
  • \myPub{}{ICOMEX}{G8 Initiative – Final Review Meeting}{Princeton, USA}
  • \myPub{}{Challenges in Understanding, Optimizing and Procuring Storage Systems}{CSCS Storage Workshop}{Lugano, Switzerland}
  • \myPub{}{Lessions learned from G8 ICOMEX: ICOsahedral-grid Models for Exascale Earth System Simulations}{ENES Workshop on Exascale Technologies and Innovation in HPC for Climate Models}{Hamburg, Germany}
  • \myPub{}{Monitoring, Simulation and Autonomous Optimization of Parallel I/O}{Zentrum für Datenverarbeitung, Johannes Gutenberg Universität}{Mainz, Germany}
  • \myPub{2013}{Guiding Parallel I/O – The Semantical Gap}{ZKI-Tagung AK Supercomputing}{Darmstadt, Germany}
  • \myPub{}{Monitoring and Optimization of I/O-Performance with SIOX}{HPC-Status-Konferenz der Gauß-Allianz}{Dresden, Germany}
  • \myPub{}{Using Simulation to Validate Performance of MPI(-IO) Implementations}{International Supercomputing Conference}{Leipzig, Germany}
  • \myPub{}{Towards Intelligent Self-Optimisation in HPC I/O}{Exascale10/EIOW satellite event, International Supercomputing Conference}{Leipzig, Germany}
  • \myPub{}{Ganzheitliches Verständnis von Nutzungs- und Systemverhalten als Zugang zu effizienterem Hochleistungsrechnen}{Paderborn Center for Parallel Computing}{Paderborn}
  • \myPub{2012}{EXIOS – Unified Exascale I/O System}{SPPEXA applicant colloquium}{Bonn, Germany}
  • \myPub{}{Simulating Parallel Programs on Application and System Level}{International Supercomputing Conference}{Hamburg, Germany}
  • \myPub{}{Towards a Unified Exascale I/O System}{IS-ENES I/O Workshop}{Hamburg, Germany}
  • \myPub{}{WiP: Simulating Application and System Interaction with PIOsimHD}{PDP 2012}{Munich, Germany}
  • \myPub{}{Modeling the I/O Path with a Functional Representation of Parallel File System and Hardware Architecture}{PDP 2012}{Munich, Germany}
  • \myPub{2011}{Towards an Energy-Aware Scientific I/O Interface}{EnA-HPC 2011}{Hamburg, Germany}
  • \myPub{}{Visualization of MPI(-IO) Datatypes}{ParCo 2011}{Ghent, Belgium}
  • \myPub{2010}{Collecting Energy Consumption of Scientific Data}{International Conference on Energy-Aware High Performance Computing}{Hamburg, Deutschland}
  • \myPub{}{Ansätze zum Monitoring hierarchischer E/A-Systeme}{ZKI-Arbeitskreis Supercomputing}{Hamburg, Germany}
  • \myPub{2009}{Tracing Internal Communication in MPI and MPI-I/O}{PDCAT 2009}{Hiroshima, Japan}
  • \myPub{2008}{Bottleneck Detection in Parallel File Systems with Trace-Based Performance Monitoring}{Euro-Par 2008}{Gran Canaria, Spain}
  • \myPub{2007}{Performance Evaluation of the PVFS2 Architecture}{Euromicro Conference on Parallel, Distributed and Network-based Processing}{Naples, Italy}
  • \myPub{2006}{Performance Analysis of Parallel File Systems}{CluStor 2006}{Heidelberg, Germany}
  • \myPub{}{Migration and Load Balancing Within PVFS2}{CluStor 2006}{Heidelberg, Germany}

Supervised Theses

2022

  • Interactive Data Center Digital Twin using Virtual Reality, Lars Quentin (Bachelor's Thesis), Advisors: Dr. Julian Kunkel, 2022-12-15, Thesis BibTeX
  • The Potential of Serverless Kubernetes-Based FaaS Platforms for Scientific Computing Workloads, Jonathan Decker (Master's Thesis), Advisors: Dr. Julian Kunkel, 2022-01-31, BibTeX URL

2021

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

2019

  • 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

2018

  • 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

2017

  • 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

2016

  • 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

2015

2014

  • 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

2012

  • 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

2010

  • 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

2009

  • 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

2008

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

2007

  • 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

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