“This exciting project has been the single most data-intensive exercise yet for Gordon since we completed large-scale acceptance testing back in early 2012,” said SDSC Director Michael Norman, who is also an astrophysicist involved in research studying the origins of the universe. “I’m pleased that we were able to make Gordon’s capabilities available under this partnership between UC San Diego, the OSG, and the CMS project.”
The around-the-clock data processing run on Gordon was completed in about four weeks’ time, making the data available for analysis several months ahead of schedule. About 1.7 million core hours – or about 15% of Gordon’s total compute capacity - were dedicated to this task, with more than 125 terabytes of data streaming through Gordon’s nodes and into SDSC’s Data Oasis storage system for further analysis. Just one terabyte of data, or one trillion bytes, equals the information printed on paper made from 50,000 trees.
“Access to Gordon, and its excellent computing speed due to its flash-based memory, really helped push forward the processing schedule for us,” said Frank Wuerthwein, a professor of physics at UC San Diego and a member of the CMS project. “With only a few weeks’ notice, we were able to gain access to Gordon and complete the runs, making the data available for analysis in time to provide crucial input toward international planning meetings on the future of particle physics.”
“Giving us access to the Gordon supercomputer effectively doubled the data processing compute power available to us,” added Lothar Bauerdick, OSG’s executive director and the U.S. software and computing manager for the CMS project. “This gives CMS scientists precious months to get to their science analysis of the data reconstructed at SDSC.”
The UC San Diego-OSG collaboration comes as the LHC was shut down in February 2013 to make numerous upgrades during the next two years. One major activity during the shutdown includes the development of plans for efficient, effective searches once the LHC is back in operation. To do that – and to have time enough to upgrade equipment – researchers must also sift through massive amounts of stockpiled data to help define future research agendas.
“Unfortunately, the shutdown schedule meant that the parked data would not be available for analysis this summer, and possibly not even for deriving meaningful contributions to planning documents for future upgrades of the experiment that are due this fall,” explained Wuerthwein.The Hunt for Dark Matter
UC San Diego researchers and CMS team members, in addition to Wuerthwein, include Jim Branson, Vivek Sharma, and Avi Yagil, all of whom played major roles in the discovery of the Higgs particle and will continue to make meaningful contributions to future related research.
“UC San Diego has been one of the most successful institutions in the global hunt for the Higgs particle discovery at the LHC,” said Wuerthwein, who is leading the university’s search for dark matter.
Wuerthwein and his colleagues will present additional details of the CMS collaboration at the 20th International Conference on Computing in High Energy and Nuclear Physics (CHEP) to be in Amsterdam, The Netherlands October 14-18, 2013. More about UC San Diego’s role in the quest to find the Higgs particle can be found at http://physicalsciences.ucsd.edu/higgs/Media Contact
Jan Zverina | EurekAlert!
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