Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 


Argonne cloud computing helps scientists run high energy physics experiments

A novel system is enabling high energy physicists at CERN in Switzerland, to make production runs that integrate their existing pool of distributed computers with dynamic resources in "science clouds." The work was presented at the 17th annual conference on Computing in High Energy and Nuclear Physics, held in Prague, Czech Republic, March 21-27.

The integration was achieved by leveraging two mechanisms: the Nimbus Context Broker, developed by computer scientists at the U.S. Department of Energy's Argonne National Laboratory and the University of Chicago, and a portable software environment developed at CERN.

Scientists working on A Large Ion Collider Experiment, also known as the ALICE collaboration, are conducting heavy ion simulations at CERN. They have been developing and debugging compute jobs on a collection of internationally distributed resources, managed by a scheduler called AliEn.

Since researchers can always use additional resources, the question arose, How can one integrate a cloud's dynamically provisioned resources into an existing infrastructure such as the ALICE pool of computers, and still ensure that the various AliEn services have the same deployment-specific information? Artem Harutyunyan, sponsored by the Google Summer of Code to work on the Nimbus project, made this question the focus of his investigation. The first challenge was to develop a virtual machine that would support ALICE production computations.

"Fortunately, the CernVM project had developed a way to provide virtual machines that can be used as a base supporting the production environment for all four experiments at the Large Hadron Collider at CERN – including ALICE," said Harutyunyan, a graduate student at State Engineering University of Armenia and member of Yerevan Physics Institute ALICE group. "Otherwise, developing an environment for production physics runs would be a complex and demanding task."

The CernVM technology was originally started with the intent of supplying portable development environments that scientists could run on their laptops and desktops. A variety of virtual image formats are now supported, including the Xen images used by the Amazon EC2 as well as Science Clouds. The challenge for Harutyunyan was to find a way to deploy these images so that they would dynamically and securely register with the AliEn scheduler and thus join the ALICE resource pool.

Here the Nimbus Context Broker came into play. The broker allows a user to securely provide context-specific information to a virtual machine deployed on remote resources. It places minimal compatibility requirements on the cloud provider and can orchestrate information exchange across many providers.

"Commercial cloud providers such as EC2 allow users to deploy groups of unconnected virtual machines, whereas scientists typically need a ready-to-use cluster whose nodes share a common configuration and security context. The Nimbus Context Broker bridges that gap," said Kate Keahey, a computer scientist at Argonne and head of the Nimbus project.

Integration of the Nimbus Context Broker with the CernVM technology has proved a success. The new system dynamically deploys a virtual machine on the Nimbus cloud at the University of Chicago, which then joins the ALICE computer pool so that jobs can be scheduled on it. Moreover, with the addition of a queue sensor that deploys and terminates virtual machines based on demand, the researchers can experiment with ways to balance the cost of the additional resources against the need for them as evidenced by jobs in a queue.

According to Keahey, one of the most exciting achievements of the project was the fact that the work was accomplished by integrating cloud computing into the existing mechanisms. "We didn't need to change the users' perception of the system," Keahey said.

For more information on the CERNVM, please visit:

For more information on the Nimbus, please visit:

The U.S. Department of Energy's Argonne National Laboratory seeks solutions to pressing national problems in science and technology. The nation's first national laboratory, Argonne conducts leading-edge basic and applied scientific research in virtually every scientific discipline. Argonne researchers work closely with researchers from hundreds of companies, universities, and federal, state and municipal agencies to help them solve their specific problems, advance America's scientific leadership and prepare the nation for a better future. With employees from more than 60 nations, Argonne is managed by UChicago Argonne, LLC for the U.S. Department of Energy's Office of Science.

Eleanor Taylor | EurekAlert!
Further information:

More articles from Physics and Astronomy:

nachricht NASA spacecraft investigate clues in radiation belts
28.03.2017 | NASA/Goddard Space Flight Center

nachricht Researchers create artificial materials atom-by-atom
28.03.2017 | Aalto University

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Entwicklung miniaturisierter Lichtmikroskope - „ChipScope“ will ins Innere lebender Zellen blicken

Das Institut für Halbleitertechnik und das Institut für Physikalische und Theoretische Chemie, beide Mitglieder des Laboratory for Emerging Nanometrology (LENA), der Technischen Universität Braunschweig, sind Partner des kürzlich gestarteten EU-Forschungsprojektes ChipScope. Ziel ist es, ein neues, extrem kleines Lichtmikroskop zu entwickeln. Damit soll das Innere lebender Zellen in Echtzeit beobachtet werden können. Sieben Institute in fünf europäischen Ländern beteiligen sich über die nächsten vier Jahre an diesem technologisch anspruchsvollen Projekt.

Die zukünftigen Einsatzmöglichkeiten des neu zu entwickelnden und nur wenige Millimeter großen Mikroskops sind äußerst vielfältig. Die Projektpartner haben...

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Das anwachsende Ende der Ordnung

Physiker aus Konstanz weisen sogenannte Mermin-Wagner-Fluktuationen experimentell nach

Ein Kristall besteht aus perfekt angeordneten Teilchen, aus einer lückenlos symmetrischen Atomstruktur – dies besagt die klassische Definition aus der Physik....

Im Focus: Wegweisende Erkenntnisse für die Biomedizin: NAD⁺ hilft bei Reparatur geschädigter Erbinformationen

Eine internationale Forschergruppe mit dem Bayreuther Biochemiker Prof. Dr. Clemens Steegborn präsentiert in 'Science' neue, für die Biomedizin wegweisende Forschungsergebnisse zur Rolle des Moleküls NAD⁺ bei der Korrektur von Schäden am Erbgut.

Die Zellen von Menschen und Tieren können Schäden an der DNA, dem Träger der Erbinformation, bis zu einem gewissen Umfang selbst reparieren. Diese Fähigkeit...

Im Focus: Designer-Proteine falten DNA

Florian Praetorius und Prof. Hendrik Dietz von der Technischen Universität München (TUM) haben eine neue Methode entwickelt, mit deren Hilfe sie definierte Hybrid-Strukturen aus DNA und Proteinen aufbauen können. Die Methode eröffnet Möglichkeiten für die zellbiologische Grundlagenforschung und für die Anwendung in Medizin und Biotechnologie.

Desoxyribonukleinsäure – besser bekannt unter der englischen Abkürzung DNA – ist die Trägerin unserer Erbinformation. Für Prof. Hendrik Dietz und Florian...

Alle Focus-News des Innovations-reports >>>



im innovations-report
in Kooperation mit academics

Industriearbeitskreis »Prozesskontrolle in der Lasermaterialbearbeitung ICPC« lädt nach Aachen ein

28.03.2017 | Veranstaltungen

Neue Methoden für zuverlässige Mikroelektronik: Internationale Experten treffen sich in Halle

28.03.2017 | Veranstaltungen

Wie Menschen wachsen

27.03.2017 | Veranstaltungen

Weitere VideoLinks >>>
Latest News

Transport of molecular motors into cilia

28.03.2017 | Life Sciences

A novel hybrid UAV that may change the way people operate drones

28.03.2017 | Information Technology

NASA spacecraft investigate clues in radiation belts

28.03.2017 | Physics and Astronomy