Erich Strohmaier Retiring After Nearly 20 Years at Berkeley Lab

June 11, 2020

One of Erich Strohmaier’s first realizations, when he came to the United States in 1995, was that despite what his guidebook told him, the wooded areas of East Tennessee weren’t all that much like the Bavarian forests he grew up in.

But it worked out for him, which seems to be a pattern in his life. He was waiting in a restaurant in Southern California when he struck up a conversation with a woman who was also waiting for someone. The random encounter led to marriage.

Erich Strohmaier presenting the Top500 list at SC18 in Dallas, Texas. (Photo courtesy of SC Conference)

After turning down one job offer from Berkeley Lab around 2000, Strohmaier applied for another one and joined the Future Technologies Group in 2001. That worked out as well and in June, he will retire from the lab after leading the group, since renamed Computer Languages & Systems Software Group, for 12 years.

 “I’m ready to do something else and I think it’s better to do it sooner rather than later,” Strohmaier said. “I will remain an affiliate at the lab so I can maintain an academic connection, listening to talks, and maybe giving a presentation now and then.”

Like many folks approaching retirement, Strohmaier and his wife had been mapping out travel ideas, with trips alternating between Europe and Asia, with some domestic travel thrown in. But the COVID-19 pandemic has caused them to hit the pause button for now. Fortunately, they were able to celebrate the annual cherry blossom festival in Japan last year.

He also plans to continue working with the TOP500 List of the world’s most powerful supercomputers. That’s another thing that started off as a small project in 1993 and has taken on a life of its own.

The Start of Something Big

Jack Dongarra, Erich Strohmaier and Horst Simon talk about the past, present, and future of the TOP500 project to celebrate the release of the 50th list. 

Strohmaier’s introduction to high performance computing (HPC) came as he was earning his Ph.D.  in theoretical physics at the University of Heidelberg. Since his thesis focused on numerical methods in elementary particle physics for which he used the largest supercomputers available, After earning his degree, he accepted a research position in HPC at the University of Mannheim for a new project comparing the performance of a number of physics applications on a Fujitsu VP2600 supercomputer.

On the first day of his new job, he attended a small university conference, the “Mannheimer Supercomputer Seminar” organized by Prof. Hans Meuer and Dr. Hans-Martin Wacker. One of his duties while working for Prof. Meuer was to assemble statistics on worldwide supercomputers in preparation for the seminar in June 1993. Thinking it would be a one-time deal, Strohmaier created a database on his computer for just that. But then Meuer and Strohmaier decided to see how much the list would change in five months and recalculated the list in time to present the results at the 1993 Supercomputing conference held in November in Portland, Oregon. The TOP500 list of the world’s top supercomputers was born.

Since then, Strohmaier’s presentation of the twice-yearly TOP500 list has become a hallmark of both the International Supercomputing held every June in Germany and the SC conference held every November in the U.S. The TOP500 list ranks supercomputers on their performance in running the Linpack benchmark application.

“Erich has been secret of the success of the list, first as a postdoc with Hans Meuer, then again with Jack Dongarra, and then a scientist at NERSC and Berkeley Lab,” said Berkeley Lab Deputy Director for Research Horst Simon, who is also a co-editor of the list. “For almost 30 years, he has provided the consistency that made the list a success and a yardstick of the progress in supercomputing. He is a great colleague and friend and it’s been a joy working with him to experience the excitement of new developments in HPC, from the days of teraflops to the dawn of exascale computing.”

The list, and increasing role of supercomputers in scientific research, gained a much higher profile in June 2002 when Japan’s Earth Simulator system assumed the top position, knocking off the ASCI White machine at Lawrence Livermore. The launch of the Earth Simulator, which held on to the No. 1 spot for five consecutive lists, spurred greater computing investments by the U.S. government. Similar ripples shook the community when China’s Tianhe-1 and Tianhe-2 systems took the top position in November 2010 and June 2013 respectively.

Coming to America

Left to right, Horst Simon, Jonathan Carter, Kathy Yelick and Erich Strohmaier accept a Top500 Award at the SC10 Conference. (Source: LBNL)

In 1995, as his research funding at Mannheim was ending, Strohmaier decided to look for a position in the U.S He consulted a German travel guide, which likened the forests around Strohmaier’s home city of Passau in Bavaria with those in eastern Tennessee. He ended up working as a postdoc with Linpack author and fellow TOP500 editor Jack Dongarra at the University of Tennessee.

At the time, Strohmaier expected his stay in the States to be temporary. After he’d been in Tennessee, a Belgian friend told him that something happens after you’ve been here after about three years and you end up staying on. But he didn’t stay in Tennessee.

He had connections with researchers at Berkeley Lab and applied for a job. He was offered the position but decided it wasn’t the right fit and turned it down. He applied for another position but didn’t get it. He applied again and was hired into the Future Technologies Group.

“The third time was the charm,” he said.

He was subsequently promoted to lead the group and sees the group’s success as one of his top three successes at the lab.

He also points to his role as principal investigator for the Extreme-Scale Scientific Workflow Analysis and Prediction (X-SWAP) project, which developed an integrated analytic performance modeling framework for distributed extreme-scale science workflows. The models were designed to reflect the observed end-to-end performance of current large scientific workflows and predict performance for future extreme-scale workflows.

The work focused on experiments at light-sources (the ALS at Berkeley and LCLS at SLAC), astronomical surveys ( the Palomar Transient Factory at Berkeley and Large Synoptic Survey Telescope at SLAC), and genomic sequence production at the Joint Genome Institute (JGI). The team used testbeds at NERSC and ESnet to verify the models.

Strohmaier said the work was broad-based, involving groups in five lab divisions and two more divisions at SLAC.

“One of my traits is that I really need to sink my teeth into things and X-SWAP was exactly that kind of project,” he said. “We worked with scientists to learn how to better analyze experimental data and we had a great collegial atmosphere.”

He said his work on the TOP500 list satisfies another one of his traits; to stick to his guns and see things through to the end.

That same drive served him well when he and his wife took a trekking vacation in Bhutan about 10 years ago. The trip was led by Robert Thurman, an author, and academic who has written and translated several books on Tibetan Buddhism (and father of actress Uma Thurman.)

“That was one of the best trips I’ve ever been on,” Strohmaier said. To remind them of the trip, they brought back three carved wooden panels that hang in their Oakland Hills home, though that may change.

One possibility is a move to Los Angeles, where Strohmaier’s wife has family. They’ve been checking real estate prices in West LA, but the situation is blurred by the current pandemic. Strohmaier thinks they may do a test-relocation for a few months to get a feel for living in the Southland.

Whatever they choose to do, it will probably work out fine.

About Computing Sciences at Berkeley Lab

The Computing Sciences Area at Lawrence Berkeley National Laboratory provides the computing and networking resources and expertise critical to advancing Department of Energy Office of Science research missions: developing new energy sources, improving energy efficiency, developing new materials, and increasing our understanding of ourselves, our world, and our universe.

Founded in 1931 on the belief that the biggest scientific challenges are best addressed by teams, Lawrence Berkeley National Laboratory and its scientists have been recognized with 13 Nobel Prizes. Today, Berkeley Lab researchers develop sustainable energy and environmental solutions, create useful new materials, advance the frontiers of computing, and probe the mysteries of life, matter, and the universe. Scientists from around the world rely on the Lab’s facilities for their own discovery science. Berkeley Lab is a multiprogram national laboratory, managed by the University of California for the U.S. Department of Energy’s Office of Science.

DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit energy.gov/science.


Source: John Bashor, Lawrence Berkeley National Laboratory 

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