Dr. Julian Kunkel

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E-mailj.m.kunkel@reading.ac.uk
AddressUniversity of Reading, CS Department, Polly Vacher, room 133
Telephone+44 118 378 8218

Dr. Kunkel is a Lecturer at the Computer Science Department at the University of Reading. Previously, he worked as postdoc in the research department of the German Climate Computing Center (DKRZ) that partners with the Scientific Computing group at the Universität Hamburg.
He manages several research projects revolving around High-Performance Computing and particularly high-performance storage. Julian became interested in the topic of HPC storage in 2003, during his studies of computer science. Besides his main goal to provide efficient and performance-portable I/O, his HPC-related interests are: data reduction techniques, performance analysis of parallel applications and parallel I/O, management of cluster systems, cost-efficiency considerations, and software engineering of scientific software. Dr. Kunkel is a member of many international program committees. He is committed to excellence in research and teaching.

  • Parallel file systems
  • 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
  • 2018, Member of the OSSG Committee, BCS Open Source Specialist Group
  • 2018, IO-500 steering committee, The Virtual Institute for I()
  • 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; 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
  • 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
  • 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)
  • 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)
  • 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)
  • 2016–2018, 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 excahange, 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

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)
  • 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

2018

2017

2016

2015

2014

2013

2012

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

2011

  • HDTrace – A Tracing and Simulation Environment of Application and System Interaction (Julian Kunkel), 2011-01-23 BibTeX PDF
  • Towards an Energy-Aware Scientific I/O Interface – Stretching the ADIOS Interface to Foster Performance Analysis and Energy Awareness (Julian Kunkel, Timo Minartz, Michael Kuhn, Thomas Ludwig), 2011 BibTeX DOI PDF

2010

  • System Performance Comparison of Stencil Operations with the Convey HC-1 (Julian Kunkel, Petra Nerge), 2010-11-16 BibTeX URL
  • Classification of Network Computers Based on Distribution of ICMP-echo Round-trip Times (Julian Kunkel, Jan C. Neddermeyer, Thomas Ludwig), 2010-09-28 BibTeX URL
  • Poster: Benchmarking Application I/O in the Community (Julian Kunkel, Olga Mordvinova, Dennis Runz, Michael Kuhn, Thomas Ludwig), 2010-06-01 BibTeX URL Abstract PDF
  • Poster: Simulation of Cluster Power Consumption and Energy-to-Solution (Timo Minartz, Julian Kunkel, Thomas Ludwig), 2010-04-14 BibTeX URL
  • From experimental setup to bioinformatics: an RNAi screening platform to identify host factors involved in HIV-1 replication (Kathleen Börner, Johannes Hermle, Christoph Sommer, Nigel P. Brown, Bettina Knapp, Bärbel Glass, Julian Kunkel, Gloria Torralba, Jürgen Reymann, Nina Beil, Jürgen Beneke, Rainer Pepperkok, Reinhard Schneider, Thomas Ludwig, Michael Hausmann, Fred Hamprecht, Holger Erfle, Lars Kaderali, Hans-Georg Kräusslich, Maik J. Lehmann), 2010-01 BibTeX URL DOI
  • Tracing Performance of MPI-I/O with PVFS2: A Case Study of Optimization (Yuichi Tsujita, Julian Kunkel, Stephan Krempel, Thomas Ludwig), 2010 BibTeX URL DOI
  • Collecting Energy Consumption of Scientific Data (Julian Kunkel, Olga Mordvinova, Michael Kuhn, Thomas Ludwig), 2010 BibTeX URL DOI
  • Simulation of power consumption of energy efficient cluster hardware (Timo Minartz, Julian Kunkel, Thomas Ludwig), 2010 BibTeX URL DOI
  • I/O Performance Evaluation with Parabench – Programmable I/O Benchmark (Olga Mordvinova, Dennis Runz, Julian Kunkel, Thomas Ludwig), 2010 BibTeX URL DOI

2009

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

2008

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

2007

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

2006

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

2018

  • PeCoH – Performance Conscious HPC: Status (Dr. Julian Kunkel, Kai Himstedt, Nathanael Hübbe, Sandra Schröder, Michael Kuhn, Hinnerk Stüben, Thomas Ludwig, Stephan Olbrich, Matthias Riebisch), 8. HPC-Status-Konferenz der Gauß-Allianz, Erlangen, Germany, 2018-10-09 Presentation
  • Overcoming Storage Issues of Earth-System Data with Intelligent Storage Systems (Dr. Julian Kunkel), 18th Workshop on high performance computing in meteorology, ECMWF, Reading, UK, 2018-09-27 Presentation
  • RD&E in Compression (Dr. Julian Kunkel), NCAS Meeting, Reading, UK, 2018-07-27
  • Comparison of Clang Abstract Syntax Trees using String Kernels (Raul Torres, Dr. Julian Kunkel, Manuel Dolz, Thomas Ludwig), HPCS 2018, Orleans, France, 2018-07-17 Presentation
  • Challenges and Opportunities for I/O (Dr. Julian Kunkel), Gung Ho Networking Meeting, Reading, UK, 2018-07-04 Presentation
  • Understanding Metadata Latency with MDWorkbench (Dr. Julian Kunkel, George Markomanolis), WOPSSS, Frankfurt, Germany, 2018-06-28 Presentation
  • Cost and Performance Modeling for Earth System Data Management and Beyond (Dr. Julian Kunkel, Jakob Lüttgau), HPC IODC Workshop, Frankfurt, Germany, 2018-06-28 Presentation
  • Community Development of Next Generation Semantic Interfaces (Dr. Julian Kunkel), Joint session of the HPC IODC Workshop and WOPSSS, Frankfurt, Germany, 2018-06-28 Presentation
  • The Virtual Institute of I/O (Dr. Julian Kunkel), BoF: The IO-500 and the Virtual Institute of I/O, ISC HPC, Frankfurt, Germany, 2018-06-27 Presentation
  • The Need for Next Generation Semantic Interfaces to Process Climate/Weather Workflows (Dr. Julian Kunkel), SIG IO UK, University of Reading, UK, 2018-06-06 Presentation
  • Towards Intelligent Storage Systems (Dr. Julian Kunkel), Computer Science Workshop, University of Reading, UK, 2018-05-08 Presentation
  • Creating a Meaningless Single Number to Appease Human Irrationality (Jay Lofstead, Dr. Julian Kunkel, John Bent, George Markomanolis), Lustre Users Group, Chicago, USA, 2018-04-26 Presentation
  • Exploiting the Heterogeneous Storage Landscape in a Data Center (Dr. Julian Kunkel), Per3s: Performance and Scalability of Storage Systems Workshop, Rennes, France, 2018-01-12 Presentation

2017

2016

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

2015

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

2014

  • 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

2013

  • 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

2012

  • 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

2011

2010

  • 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

2009

2008

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

2007

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

2006

  • 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

2018

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