• Citer

The CMS data transfer test environment in preparation for LHC data taking

par Bagliesi, Giuseppe;Magini, Nicolò;Bauerdick, Lothar A T L.;Fisk, Ian;Rossman, Paul;Wu, Yuping;Belforte, Stefano;Bloom, Kenneth;Bockelman, Brian;Bonacorsi, Daniele;Sartirana, Andrea;Brew, Chris A J C.;D'Hondt, Jorgen;Maes, Jan Willem;Van Mulders, Petra;Egeland, Ricky;Elgammal, Sherif ;Fassi, Farida;Pukhaeva, Nelli;Flix, Josep;Hernández, José Manuel;Kadastik, Mario;Sõnajalg, S.;Klem, Jukka;Kodolova, Olga;Kuo, Chiaming C.M.;Letts, James;Wiirthwein, F.;Metson, Simon;Piedra, Jónatan;Ge, Qing;Shih, Jason;Teodoro, Douglas;Trunov, Artem;Tuura, Lassi;Wildish, Tony
Référence IEEE Nuclear Science Symposium conference record, page (3475-3482), 4775085
Publication Publié, 2008

Article révisé par les pairs

• Détails
• Contenu

Résumé :

The CMS experiment is preparing for LHC data taking in several computing preparation activities. In distributed data transfer tests, in early 2007 a traffic load generator infras-tructure was designed and deployed, to equip the WLCG Tiers which support the CMS Virtual Organization with a means for debugging, load-testing and commissioning data transfer routes among CMS Computing Centres. The LoadTest is based upon PhEDEx as a reliable, scalable dataset replication system. In addition, a Debugging Data Transfers (DDT) Task Force was created to coordinate the debugging of data transfer links in the preparation period and during the Computing Software and Analysis challenge in 2007 (CSA07). The task force aimed to commission most crucial transfer routes among CMS tiers by designing and enforcing a clear procedure to debug problematic links. Such procedure aimed to move a link from a debugging phase in a separate and independent environment to a production environment when a set of agreed conditions are ach eved for that link. The goal was to deliver one by one working transfer routes to Data Operations. The experiences with the overall test trans-fers infrastructure within computing challenges - as in the WLCG Common-VO Computing Readiness Challenge (CCRC'08) - as well as in daily testing and debugging activities are reviewed and discussed, and plans for the future are presented. ©2008 IEEE.