n°28I quarterlyI January 2013 Focus | 23 w 03 02 the futurelsst telescope will be installed inchile on top ofcerro Pachón (artist’s rendition). 03With 189 sensors, it will record sky images in unpre- cedented detail. Pictured here: the simulation of a photo taken by a single sensor. 02 I orat P or lsstc © Mokrane Bouzeghoub, deputy scientific director of the INS2I,5 which coordinates Mastodons. “At the heart of these issues are algorithms, methodologies, but also High Performance Computing (HPC) infrastructures.” unAnswErED QuEsTIons M Farouk Toumani, LIMOS6 researcher I and head of the Petasky project within IMulat Mastodons, shares the same point of lssts view. “A telescope like the LSST, which © should go live in 2020, will be able to save AlGorIThm. come up with new ways to process data,” 01.laboratoireinformatiquedegrenoble(cnrs/ a 3 billion-pixel image of the sky every 17 A series of notes Toumani. Sihem Amer-Yahia, universitédegrenoble-I,-II,and-III/Institut seconds,” he explains. At the end of the operations and social network specialist at the LIG, 02.sources:Youtube,Instagram,theradicatigroup.renoble).gdepolytechnique program, astronomers will have a solve a problem. agrees. “The Big Data revolution, driven 03.physiquedesparticules. nucléaireetdephysiquedenationalInstitutinstructions to 140-petabyte database containing hun- by the explosion of social networks where 05.Institutdes.sciencesinformatiquesetdeleurscIDource:s04. dreds of characteristics for each object in citizens themselves provide the content, interactions. the sky. At present, even the most efficient has overthrown the traditional data 06.laboratoired’Informatique,demodélisationetdeniversitéu/cnrs(systèmesdesd’optimisation data mining algorithms would take doz- storage and processing structure.” clermont-Ferrand-Iand–II/ecoledesMinesde saint-etienne/Inst.Fr.Meca.avancéeclermont- ens of years to explore the database and Ferrand). answer certain questions raised by re- rADICAluPhEAvAl searchers. LSST program scientists al- Everybody is concerned. From biologists ready know that some of their more to astrophysicists, from Facebook to the complex interrogations will remain un- tax office: no one can escape the Big Data answered. Nevertheless, such a database phenomenon or the problems it spawns. is an ideal field of application for further This is an urgent issue: the amount of cihem Amer-yahia Ion:ormatFnIontacts fundamental research into Big Data, digital information generated worldwide > sihem.amer-yahia@imag.fr which is exactly what researchers on the doubles every two years, and this pace is > mokrane.bouzeghoub@cnrs-dir.frokrane Bouzeghoubm Petasky project are involved in. “In order accelerating. “Data is at the heart of both Christine Collet to overcome the obstacles inherent to the the digital economy and the information Farouk Toumanichristine.collet@grenoble-inp.fr> handling of very large volumes of data, society,” concludes Collet. “It represents a > farouk.toumani@isima.fr we will certainly need to improve storage basic ingredient with high-added value: >mark.asch@u-picardie.frark Aschm and processing technologies, as well as nothing will happen without it.”
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