The National Laboratory of Legnaro (LNL) includes a computing farm since 2001. The computing center is part of the GRID infrastructure developed to satisfy the requirements of the modern high energy physics experiments at the Large Hadron Collider (LHC). LHC is a hadron collider that run with proton proton beams at center of mass energy 7 TeV (2011) and 8 TeV (2012). The LNL site is Tier 2 site for especially the Compact Muon Solenoid (CMS) since 2006 and for A Large Ion Collider Experiment (ALICE) since 2011. The total storage is around 2 PB and the computing power is around 5500 kSI2000. More than 3000 server are located in 22 racks in an hall with temperature and humidity controlled. The Tier 2 network is essentially based on a 1 Gb/s backbone. A dedicated cooling infrastructure is active. Physicists from every country can access to data stored at LNL and they can run their analysis jobs with good performance in time and safety.

New boson Higgs like is discovered. A lot of SUSY and exotica studies set stringent limits on new particles mass. Some features of QGP are succefully investigated. GRID is an essential tool for HEP collaborations. LNL-Padova is an important and efficient distributed computing center.

ALICE is a dedicated heavy-ion detector to exploit the unique physics potential of nucleus-nucleus interactions at LHC energies. Aim is to study the physics of strongly interacting matter at extreme energy densities, where the formation of a new phase of matter, the quark-gluon plasma, is expected.

Number jobsNumber CPU used by jobAvailabilityPhedex data transferWhich data are stored al LNL?…….……………..………………….

10 km fiber optic links @ 10 Gbps

LNL-Padova Distributed Computing Center in the LHC World Wide Computing GRID

INFN - LNL

LHC DATA ANALYSIS CENTRE @ INFN (LNL – PADOVA)A world wide Computing GRID enabled site

CMS is a general purposes physics experiment installed near Cessy (France) 100 m underground along the LHC circunference. CMS goals are discovery and studies Higgs boson, searches about supersymmetry and new physics at 1 TeV scale.

LNL-Padova Computing Centre performances

ALICE running jobs…………………….…………………………………………

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CPU load in the period March 2012 – Februry 2013 …………………….………………………………….………………..…………….

Data provenance Total data tansferred = 440 TB…………………….……………………………………………………………

Particle physics experiments @ LNL-Padova computing center

INFN - Padova

Worl Wide Computing GRID