This is an archived page of the 2007 conference



Horst Simon, NERSC/LBNL, USA
Dr. Horst Simon was named Associate Laboratory Director (ALD) for Computing Sciences at Berkeley Lab in 2004. In his role as the ALD for Computing Sciences, Horst represents the interests of the Lab’s scientific computing divisions, NERSC and Computational Research, in the formulation of Laboratory policy, and leads the overall direction of the two divisions. He also coordinates constructive interactions within the computing sciences divisions to seek coupling with other scientific programs.

Horst joined LBNL in early 1996 as director of the newly formed NERSC Division, and was one of the key architects in establishing NERSC at its new location in Berkeley. The NERSC Center is DOE’s flagship supercomputing facility for unclassified research funded by DOE’s Office of Science and is currently supports 2,677 users at more than 300 institutions. Under Horst’s leadership, NERSC has enabled important discoveries in fields ranging from global climate modeling to combustion to astrophysics. Horst is also the founding director of Berkeley Lab's Computational Research Division, which conducts applied research and development in computer science, computational science, and applied mathematics. His research interests are in the development of sparse matrix algorithms, algorithms for large-scale eigenvalue problems, and domain decomposition algorithms for unstructured domains for parallel processing.

Horst's recursive spectral bisection algorithm is regarded as a breakthrough in parallel algorithms for unstructured computations, and his algorithm research efforts were honored with the 1988 Gordon Bell Prize for parallel processing research. Horst was member of the NASA team that developed the NAS Parallel Benchmarks, a widely used standard for evaluating the performance of massively parallel systems. He is also one of four editors of the twice-yearly “TOP500” list of the world’s most powerful computing systems.

Norman L. Miller, Lawrence Berkeley National Laboratory, USA
Norman L. Miller's research focuses on understanding hydroclimate processes and related impacts based on modeling and analysis of regional climate, hydrology, and ecology, and their impacts on energy and water supply and demand, water quality, agriculture, and impacts to other sectors of society. His research includes conceptual models, numerical code development and evaluation, statistical analyses of historical and projected global and regional climate, numerical weather and streamflow ensemble prediction, seasonal forecasts, and scaling theories.

Miller uses remote-sensed observations, reanalysis data, and IPCC AOGCM projections as input forcing to his limited area models and statistical downscaling schemes to understand climate and impacts at site-to-regional scales. He also leads the Regional Climate System Modeling Group, is the Associate Director of the Berkeley Water Center, and is an Adjunct Professor in the Department of Hydrology and Water Resources at the University of Arizona at Tucson.

Peter J. Ungaro, Cray Inc., USA
Peter J. Ungaro serves as President and Chief Executive Officer of Cray Inc. Prior to his appointment as President in May 2005, and CEO in August 2005, Ungaro was Senior Vice President responsible for sales, marketing and service. In this role Ungaro was responsible for creating and implementing the company's worldwide sales and marketing strategy, expanding opportunities for current and future Cray products, collaborating closely with product development and other technical leaders, enhancing the capabilities of Cray's global sales force, and leading service and support for Cray's customers around the world.

Before joining Cray in 2003, Ungaro served as Vice President of Sales for Worldwide Deep Computing, at IBM. In that role, he led global sales of all IBM server and storage products for high performance computing, life sciences, digital media and business intelligence markets. Ungaro coordinated IBM solutions teams that included sales, technical, marketing and product development personnel. Prior to that assignment, he was IBM's Vice President of Sales, Worldwide High Performance Computing. He also held a variety of other sales leadership positions since joining IBM in 1991. Ungaro received a B.A. in business administration from Washington State University.

Technical Presenters

Daniel Andresen, Kansas State University, USA
Daniel Andresen received his B.S. in Computer Science and Mathematics (double major) from Westmont College, California, in 1990, his M.S. in Computer Science from California Polytechnic State University, San Luis Obispo in 1992, and his Ph.D. in Computer Science from the University of California, Santa Barbara, in 1997. He joined the Department of Computing and Information Sciences at Kansas State University (KSU) in 1997. Andresen is currently an associate professor whose research interests include parallel and distributed computing, scheduling and runtime systems, high-performance scientific computing and digital libraries.

Vincent Bannister, Microsoft, USA
Vincent Bannister graduated from North Carolina State in 2006 with a B.S. in Computer Science and a B.S. in Applied Mathematics. He has been working at Microsoft in Redmond, Washington, since August 2006. As an undergraduate researcher helping Tim Kelley, he used the N.C. State HPC cluster for groundwater simulations. He will present some results on I/O optimization.

Brian Behlendorf, LLNL, USA
Brian Behlendorf is a Computer Scientist in the Production Linux Group at Lawrence Livermore National Labs. He is primarily involved in parallel file system development and deployment in a high-performance computing environment. His current projects include resolving stability, scalability, and performance issues observed on production Linux clusters at LLNL running the Lustre Parallel Filesystem.

Brian Bresnahan, University of Chicago, USA
John Bresnahan is a Senior Software Developer at Argonne National Laboratory and a Ph.D. student at the University of Chicago. His research interests include wide-area, fast data transport and data transfer Grid services. He has worked for the Globus project for more than eight years with a focus on GridFTP and data-transfer software.

Jason Cope, University of Colorado at Boulder, USA
Jason Cope is a Ph.D. student in the Department of Computer Science at the University of Colorado at Boulder. His research interests include high-performance computing, Grid computing, and service-oriented architectures.

Dave Fellinger, DataDirect Networks, USA
Dave Fellinger is one of the key architects of DataDirect Networks’ Silicon Storage Appliance (S2A) storage controller technology. He brings over 30 years of experience in engineering including film systems, ASIC design and development, GaAs semiconductor manufacture, RAID and storage systems, and video processing devices. His experience includes serving as Vice President of Engineering for Ultimatte Corporation, where his products won several awards including an Oscar and an Emmy. Mr. Fellinger attended Carnegie-Mellon University and holds patents in optics, motion control, video processing, and pattern recognition.

Chris Gottbrath, TotalView Technologies LLC, USA
Chris Gottbrath is Product Manager for the TotalView Debugger at TotalView Technologies LLC. He is focused on making it easier for programmers, scientists and engineers to solve even the most complex bugs and get "back to work." He has pursued this goal in a variety of customer-focused technical roles at Etnus over the last 6 years. Prior to that, as a graduate student of astrophysics at the University of Arizona in Tucson, he wrote cosmological simulations (with the occasional bug) using C and MPI on a small-scale Beowulf cluster.

Fengping Hu, Purdue University, USA
Fengping Hu is a graduate student in the Department of Electrical and Computer Engineering Technology, at Purdue University. He is finishing his master's program, specializing in computational science, this summer. He works as a research assistant for Professor Evans in the Adaptive Computing Systems Lab (ACSL).

Olfa Hamdi-Larbi, University of Sciences of Tunis, Tunisia
Olfa Hamdi-Larbi is preparing a co-advising Ph.D. between University of Sciences of Tunis in Tunisia and University of Versailles Saint-Quentin-en-Yvelines in France. She is working on "automatic detection of the optimal compression format for sparse matrices in parallel and distributed systems." She is teaching at High Institute of Computer Science in Tunisia.

Dean Hildebrand, Univeristy of Michigan, USA
Dean Hildebrand recently completed his Ph.D. in Computer Science and Engineering at the University of Michigan. His dissertation focused on increasing the scalability and performance of distributed access to high-performance file systems. His research includes pNFS, an NFSv4.1 high-performance enhancement that provides direct storage access to heterogeneous parallel file systems while preserving NFSv4 operating system and hardware platform independence.

Hildebrand also holds an M.S. from the University of Michigan and a B.S. from the University of British Columbia. He has worked as a research assistant at the Sandia National Laboratories and as a software developer at several companies, including IBM, Nortel Networks, and Scotiabank.

Terry Jones, LLNL, USA
Terry Jones works in the Integrated Computing and Communications Department (ICC) at LLNL where he investigate high-performance runtime systems and infrastructure software for parallel programming. His interests include the unique issues faced in High Performance Computing (HPC), especially issues surrounding the effective use of large, shared-memory and distributed-memory parallel machines. Jones also has a background in software design for scalable I/O architectures and in software development of new parallel tools and libraries.

Prior to coming to LLNL, he worked for Bell Helicopter as a software engineer and PA Incorporated as a physicist/programmer. He holds a master's degree in Computer Science from Stanford University and a bachelor's degree in Physics from Southwestern Oklahoma State University.

Rashawn Knapp, Portland State University, USA
Rashawn Knapp is a Ph.D. student in computer science at Portland State University (PSU). She conducts research with her advisor, Dr. Karen Karavanic, in the area of performance measurement and evaluation for parallel applications, as a member of the High Performance Computing Lab. Her dissertation work focuses on methods to diagnose performance problems observed in parallel applications that are caused by the runtime system. Since 2005, Knapp has contributed to the development of PerfTrack, a data store and interface for managing performance data from large-scale parallel applications. This project is a collaboration between PSU and Lawrence Livermore National Laboratory, where Knapp was a technical scholar in summer 2006.

Jeff Larkin, Cray Inc., USA
Jeff Larkin is a graduate of the Computer Science Departments of Furman University and the University of Tennessee. He currently works in the Cray Supercomputing Center of Excellence at Oak Ridge National Laboratory. His main area of expertise is porting and optimizing applications for the Cray XT supercomputers.

Andy Loftus, NCSA/UIUC, USA
Andy Loftus worked with Linux for 11 years and administered SANs for 5 years. He manages 1.1PB of disk storage, 757TB SAN attached across six SAN islands totaling 1,312 switch ports on 18 switches and 2 routers. Loftus has authored numerous programs that, combined with open-source tools, facilitate the automation of managing, monitoring and troubleshooting disks and SAN equipment.

Debbie Montano, Force10 Networks, USA
Debbie Montano is director of research and education alliances at Force10 Networks ( With 20 years of experience in networking and computer software development, implementing national IP and optical networks and forging alliances with industry groups and networking partners, Montano directs and develops Force10’s partnerships with organizations throughout the high-performance research and education community.

Montano has been deeply involved with the research and education community throughout her career. At National LambdaRail, she deployed a nationwide optical network for US research universities. As advanced Internet initiatives director at Qwest, she was instrumental in developing and implementing the nationwide Internet2 Abilene Network, which connects over 200 universities in all 50 states. Montano has collaborated and developed partnerships with leading regional research and education networking organizations, including TheQuilt, and government-sponsored projects such as the DARPA Next Generation Internet Supernet project and the Energy Sciences Network.

Montano fosters and advances relationships with Force10 partners and customers, including the Internet2 Hybrid Optical & Packet Infrastructure (HOPI) project, Teragrid, Gloriad, Transpac2, UltraScienceNet, CERN, US Department of Energy labs, the Quilt and many others. She has also supported the annual Supercomputing (SCxy) conferences since 1999, most recently as Bandwidth Challenge Chair for SC05.

Montano has also held positions at Kenan Systems, Hathaway Corporation and McData Corporation. She holds a BS in computer science and engineering from MIT.

Patrick Ohly, Intel Corporation, DE
Patrick Ohly is a Senior Software Engineer at Intel GmbH, Bruehl. He is responsible for development of "Intel Trace Collector", new features binary instrumentation, fault tolerance, and MPI correctness checking.

Matthew O'Keefe, USA
From 1990 to May 2000, Matthew O'Keefe taught and performed research in storage systems and parallel simulation software as a professor of electrical and computer engineering at the University of Minnesota. He founded Sistina Software in May of 2000 to develop storage infrastructure software for Linux, including the Global File System™ (GFS) and the Linux Logical Volume Manager (LVM). Sistina was acquired by Red Hat in December 2003, where O'Keefe developed storage product and technology strategy. In 2005, he founded Alvarri, a company specializing in online backup technologies. In addition, Alvarri has assisted Cray in developing storage architecture and deployment strategy for the XT product line.

Matthew Papakipos, PeakStream, USA
Matthew Papakipos is Chief Technology Officer and Founder of PeakStream. Before founding PeakStream, he spent seven years at NVIDIA where he was an early member of the Graphic Processing Unit (GPU) processor architecture group. He was responsible for developing several core architectural components of NVIDIA's GeForce GPU. He served as Architecture Group Manager and Director of Architecture, and ultimately led an 85-person processor architecture design organization.

Papakipos first worked in the area of high-performance computing in 1990, programming the MasPar MP-1 and Thinking Machines CM-5 supercomputers as an applications engineer at MasPar and as a student at Brown University. He is the author of more than 20 U.S. patents on processor architecture and implementation. Papakipos earned a Sc.B. degree in Mathematics/Computer Science from Brown University.

Ivan Passos, Avocent, USA
As a director of product management, Ivan Passos is responsible for defining future Avocent product offerings that will provide customers with top of the line management solutions. Those products will include the benefits generated by the integration of LANDesk and Avocent technologies.

With more than 10 years of experience developing products in IT connectivity and remote administration, Passos is also responsible for market research and product management for the emerging area of embedded server and blade management through iLO, IPMI and other service processors.

Prior to the 2006 acquisition of Cyclades Corporation by Avocent, Passos served at Cyclades as the Director of Research and Innovation. He joined Cyclades in 1995 as a Software Engineer in Research and Development and later moved to Product Marketing and global product management. Passos holds a bachelor of science degree in electrical engineering from San Jose State University in San Jose, California.

Stan Posey, Panasas, USA
Stan Posey currently manages the Panasas strategy of HPC Applications and Industry Development for a variety of target vertical markets. He is responsible for company guidance and consultation on Panasas advancement of HPC technology and solutions, with emphasis on applications in computational mechanics and sciences. Prior to joining Panasas in 2007, Posey has contributed for more than 20 years in various roles of HPC applications development including applications engineering and market development roles at SGI, research and engineering positions with the U.S. Department of Energy, Oak Ridge National Laboratory, consulting and software vendor CD-adapco Group, and systems vendor Control Data Corporation. Posey has co-authored several papers for HPC research journals and technical conferences, and his education includes a M.Sc. in Mechanical Engineering from the University of Tennessee, Knoxville, TN, USA.

Philip Roth, Oak Ridge National Laboratory, USA
Philip Roth is a computer scientist at Oak Ridge National Laboratory (ORNL), where he is a founding member of the Future Technologies Group in the Computer Science and Mathematics Division. His research interests include performance analysis, prediction, and tools with special emphases on scalability and automation; systems software; virtualization technologies; programming models; and storage for large-scale systems. He earned his Ph.D. in Computer Science from the University of Wisconsin, Madison in 2005. He joined ORNL in 2004.

Jeffrey Vetter, Oak Ridge National Laboratory, USA
Jeffery Vetter is a computer scientist in the Computer Science and Mathematics Division (CSM) of Oak Ridge National Laboratory (ORNL) where he leads the Future Technologies Group. He is also a joint professor in the College of Computing at Georgia Institute of Technology. His research interests lie largely in the areas of experimental software systems and architectures for high-end computing. Vetter earned his Ph.D. in Computer Science from the Georgia Institute of Technology; he joined CSM in 2003.


Robert Ballance, Sandia National Laboratories, USA
Robert (Bob) Ballance is a Principal Member of Technical Staff at Sandia National Laboratories, where he has been deeply involved in the delivery, acceptance testing, and production operation of Red Storm, Sandia's newest capability high-performance computing platform. As system manager, he stands in the intersection of system design, system administration, operations, and user support.

Ballance honed his production HPC-operations skills while serving as the Manager of Systems and Systems Research at the Center for High Performance Computing at the University of New Mexico (HPC@UNM). There, he oversaw all of the high-performance computing systems associated with the Center, including the 512-processor Los Lobos cluster. Los Lobos was among the first three Linux clusters to break the top 100 list of supercomputers. He also played a guiding role in the early adoption and evolution of Access Grid technology.

From 1993 to 1999 Bob was employed in the private sector, first as President of Object Science Corporation and later as an independent consultant serving both government and private-sector clients. During this time, he worked as a software architect, designer, and developer for products related to scientific computing and to the Internet. From 1988 to 1993, he served as an Assistant Professor of the University of New Mexico Computer Science Department. At UNM, His compiler research resulted in the definition and application of the Program Dependence Web as a data structure for optimizing compilers and program translators.

Ballance received his Ph.D. from University of California, Berkeley, in 1989. He currently serves as a member of the Linux Clusters Institute Steering Committee, and chair of the XT3/XT4 Special Interest Group of the Cray User’s Group.

Scott Brandt, UC at Santa Cruz, USA
Scott Brandt is Associate Professor and Director of Graduate Studies in the Computer Science Department of the University of California, Santa Cruz. He is Associate Director of the UCSC Storage Systems Research Center and the UCSC/Los Alamos Institute for Scalable Scientific Data Management. He received his Ph.D. in 1999 from the University of Colorado. Prior to joining academia, Brandt spent a number of years doing research and development at Secure Computing Corporation, Alliant Techsystems Research and Technology Center, Honeywell Systems and Research Center, and Theseus Research, a company he co-founded to pursue innovations in asynchronous circuit technology and parallel computer languages. Brandt's current research interests are in storage systems, real-time systems, and the confluence of the two areas, especially as applied to large distributed high-performance storage systems.

Gary Grider, Lawrence Berkeley National Laboratory, USA
Gary Grider is the group leader of HPC-5, the High-Performance Systems Integration group in the HPC division at the Los Alamos National Laboratory (LANL). Gary is also the the US-DOE/National Nuclear Safety Administration I/O and Storage Leader and the High End Computing Inter-agency Working Group (HECIWG) File Systems and I/O Leader which coordinates the US government investments in File Systems and I/O research and development. Additionally, Gary is the director of the LANL/University of California Santa Cruz Institute for Scalable Scientific Data Management, an educational institute training advanced degree students on high performance computing storage topics. Prior to working for LANL, Gary spent 10 years working for IBM in the storage area and 5 years working at Sandia National Laboratories also in the data storage field.

Don Lane, U.S. Forest Service, USA
Don Lane is the Supervisory Recreation Forester for the U.S. Forest Service at Lake Tahoe. Over the past 35-years he has been responsible for the management of the National Forest campgrounds, beaches, backcountry, wilderness areas and recreation programs within the Tahoe Basin. Lane has instructed multiple courses in forestry, natural history and recreation planning at the Lake Tahoe Community College, and he currently lectures at the college's wilderness institute. He has authored a score of magazine and newspaper articles on Tahoe's rich history, and is the author of Tahoe Tales of Bygone Days and Memorable Pioneers. Since 1995, he has recorded more than 3,000 segments of the popular local radio feature "Don Lane's Tales of Tahoe."

Ethan Miller, UC at Santa Cruz, USA
Ethan Miller is an associate professor of computer science at the University of California, Santa Cruz, where he is a member of the Storage Systems Research Center (SSRC). He received his ScB from Brown in 1987 and his PhD from UC Berkeley in 1995, where he was a member of the RAID project. He spent six years at the University of Maryland Baltimore County before joining the UC Santa Cruz faculty in 2000. He has written more than 75 papers covering topics such as archival storage, large-scale storage systems, file systems for next-generation storage technologies, secure file systems, distributed systems, and information retrieval. His current research projects, which are funded by the National Science Foundation, Department of Energy, and industry support for the SSRC, include issues in petabyte-scale storage systems, long-term archival storage systems, and file systems for non-volatile RAM technologies; earlier research on information retrieval was funded by the Department of Defense. Prof. Miller's broader interests include file systems, operating systems, parallel and distributed systems, and computer security. In addition to research and teaching in storage systems and operating systems, Miller has consulted with industry to help move research results into commercial use. He can be contacted at

Timothy Thomas, HPC@UNM, USA
Timothy Thomas is deputy director of the University of New Mexico Center for High Performance Computing. He is also research professor at the New Mexico Center for Particle Physics.

Brent Welch, Panasas, USA
Brent Welch is Director of Software Architecture at Panasas. Panasas has developed a scalable, high-performance, object-based distributed file system that is used in a variety of HPC environments, including many of the Top500 super computers. He has worked at Xerox-PARC and Sun Microsystems Laboratories. Brent has experience building software systems from the device driver level up through network servers, user applications, and graphical user interfaces. While getting his PhD at UC Berkeley, he designed and built the Sprite distributed file system. Brent participates in the NFSv4 working group, and is co-author of the pNFS internet drafts that specify parallel I/O extensions for NFSv4.

Vendor Presenters

David Barkai, Intel, USA
David Barkai is an HPC (High Performance Computing) computational architect for Intel corporation. He also held a number of positions within Intel research labs and was a content architect for the Intel Developer Forum conference. Before joining Intel in 1996, Barkai worked for more than 25 years in the field of scientific and engineering supercomputing for Control Data Corporation, Cray Research Inc., Supercomputer Systems Inc., and NASA Ames Research Center. He holds a Ph.D. in theoretical physics and has more than 20 publications as papers, conference proceedings, and textbook contributions on the subjects of physics, numerical methods, and computer applications and architectures. He authored the book Peer-to-Peer Computing: Technologies for Sharing and Collaborating on the Net (Intel Press, 2001) and articles on related topics.

Richard Friedman, Scali, USA
Richard Friedman is the Vice President of Product Marketing at Scali, a leader in Linux Cluster Management solutions. While he currently carries the title of VP of Product Marketing, he is, in fact, an engineer with a BSEE from University of Pennsylvania with experience in semiconductor design, networking and servers. Additionally, he spent a number of years in the high-performance applications areas of electronic design automation and pharmaceutical clinical trials. His combination of hardware and software experience, as a vendor and as a user, provides a unique perspective.

David Jackson, Cluster Resources, USA
David Jackson, CTO of Cluster Resources, has more than fifteen years of experience in the high-performance computing (HPC) industry. He designed and developed the pervasive Maui Scheduler and other open-source resource management software, and has since been the lead architect for cluster, grid and hosting center management suites (Moab Cluster Suite, Moab Grid Suite and Moab Hosting Suite).

Jackson has worked for numerous high-performance computing centers providing resource management and scheduling services including Lawrence Livermore National Laboratory, San Diego Supercomputer Center, NCSA, PNNL, MHPCC, and the Center for High Performance Computing. He has also worked as a consultant at IBM's AIX System Center. A founding member of the Global Grid Forum scheduling working group and a key member of the Department of Energy's Scalable System Software Initiative, Jackson authored numerous publications and has presented at various HPC conferences including Supercomputing, GlobusWorld, IEEE Sigmetrics, and Usenix/Extreme Linux.

Kent Koeninger, HP, USA
R. Kent Koeninger is the Product and Technology Marketing Manager for Emerging Technologies in High Performance Computing (HPC) at HP. Koeninger pays attention to scalable HPC storage, scalable interconnects, accelerators, and other emerging HPC technologies. He has more than twenty-five years of supercomputing experience, including positions such as the "Cray Evangelist" at Apple Computer, the Cray MPP Program Manager at Cray Research, high-performance clustering product management at SGI, and now Emerging HPC Technologies at HP.

Michael Leinberger, Myricom, USA
Available soon.

Benoît Marchand, eXludus, USA
Benoît Marchand is a renowned computer scientist, active in the field of high-performance computing, Distributed Processing and Database applications for more than 21 years. He has held senior management positions at Sun Microsystems where he grew the European HPC business from #5 ranking to top position in two years. While at Sun he also spearheaded compute cluster product design and sales. Prior to joining Sun, Marchand managed pre-sales technical support operations in Europe for SGI for eight years and developed innovative code optimization techniques and marketing initiatives, which enabled SGI to take and maintain a leadership position in high-performance computing in Europe for five consecutive years. Marchand was also a frequent lecturer at a number of major European research centers. He holds an MBA from HEC and a master's degree in computer science from University of Waterloo.

Douglas Miles, The Portland Group, USA
Douglas Miles is responsible for all business and technical operations of The Portland Group (PGI). He has worked in various positions over the past 20 years in HPC applications engineering, math library development and technical marketing at Floating Point Systems, Cray Research Superservers, PGI and STMicroelectronics.

Jamie Riotto, Cisco, USA
Jamie Riotto is currently Sr. Director of Engineering with Cisco Systems Server Virtualization Business Unit. Riotto joined Cisco as a result of Cisco’s acquisition of Topspin Communications in 2005 where Jamie was VP Engineering. He joined Topspin Communications in 2000 as VP Engineering & Operations and led Topspin’s creation of the Server Switch architecture which combined Server and I/O Virtualization technologies with high-performance InfiniBand switching to create an enterprise cluster fabric. Prior to Topspin Communications, Riotto was a co-founder and vice president of Engineering for Terawave Communications, a Passive Optical Networks (PON) company. Terawave ships a carrier-class Fiber-To-The-Buisiness product that supported SONET quality voice, QoS based IP, Video and ATM over single optical fibers.

Prior to Terawave, Riotto led the Systems Engineering team for SGI's high-end desktop division for most of the 1990s. During his tenure, he drove the architecture for the Octane workstation, one of the world's first full crossbar computers, and SGI’s first billion-dollar product. Prior to SGI, he was the Chief Hardware Architect at Unisys/Convergent, responsible for creating a hypercube distributed-message-based Unix fault-tolerant mainframe. Riotto was also a CPU designer at Tandem computers, helped debug the first SUN workstation at Stanford, and worked on the world's first portable computer, a 25-pound suitcase, at IBM.

Michael Rudgyard, Allinea, USA
Michael Rudgyard is the CEO and Founder of Allinea Software, a UK provider of parallel and multicore development tools. He has a DPhil in Numerical Analysis from Oxford University and was subsequently involved in parallel computing during a research career at CERFACS in France, and subsequently at Oxford and Warwick Universities in the UK. While in research, Rudgyard led a team that developed a complex application for fluid dynamics simulations that currently scales to more than 5,000 processes on the IBM BlueGene MPP. His experience in large-scale parallelism led him to set up Allinea with the aim of providing scalable, yet easy-to-use, development tools for HPC and multicore processing.

Jay Urbanski, IBM, USA
Jay Urbanski is a Linux Cluster Sales Specialist for IBM's Systems and Technology Group focused on large / complex opportunities. He has architected some of the largest Linux clusters in the world. He was a leading proponent of Linux and Linux clusters at IBM and helped found IBM's Linux cluster business. Urbanski has also held the positions of worldwide HPC IT Architect and lead Windows NT specialist in the IBM Americas Advanced Technical Support team. He has been at IBM since 1996.