M. Bencivenni, M. Canaparo, F. Capannini, Luciana Carota, M. Carpene, Alessandro Cavalli, Andrea Ceccanti, M. Cecchi, Daniele Cesini, Andrea Chierici, Vincenzo Ciaschini, A. Cristofori, S. Dal Pra, Luca dell Agnello, D. De Girolamo, M. Donatelli, Danilo N. Dongiovanni, Enrico Fattibene, Tiziana Ferrari, Andrea Ferraro, Alberto Forti, Antonia Ghiselli, D. Gregori, G. Guizzunti, Alessandro Italiano, Luca Magnoni, B. Martelli, Mirco Mazzucato, G. Misurelli, M. Onofri, A. Paolini, A. Prosperini, P. P. Ricci, Elisabetta Ronchieri, F. Rosso, D. Salomoni, V. Sapunenko, Valerio Venturi, R. Veraldi, P. Veronesi, Maria Cristina Vistoli, D. Vitlacil, S. Zani, Riccardo Zappi. INFN-CNAF activity in the TIER-1 and GRID for LHC experiments. In 23rd IEEE International Symposium on Parallel and Distributed Processing, IPDPS 2009, Rome, Italy, May 23-29, 2009. pages 1-9, IEEE, 2009. [doi]
The four High Energy Physics (HEP) detectors at the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) are among the most important experiments where the National Institute of Nuclear Physics (INFN) is being actively involved. A Grid infrastructure of the World LHC Computing Grid (WLCG) has been developed by the HEP community leveraging on broader initiatives (e.g. EGEE in Europe, OSG in northen America) as a framework to exchange and maintain data storage and provide computing infrastructure for the entire LHC community. INFN-CNAF in Bologna hosts the Italian Tier-1 site, which represents the biggest italian center in the WLCG distributed computing. In the first part of this paper we will describe on the building of the Italian Tier-1 to cope with the WLCG computing requirements focusing on some peculiarities; in the second part we will analyze the INFN-CNAF contribution for the developement of the grid middleware, stressing in particular the characteristics of the Virtual Organization Membership Service (VOMS), the de facto standard for authorization on a grid, and StoRM, an implementation of the Storage Resource Manager (SRM) specifications for POSIX file systems. In particular StoRM is used at INFN-CNAF in conjunction with General Parallel File System (GPFS) and we are also testing an integration with Tivoli Storage Manager (TSM) to realize a complete Hierarchical Storage Management (HSM).