CERN Accelerating science

Published Articles
Title	Interoperating AliEn and ARC for a Distributed Tier1 in the Nordic Countries
Author(s)	Gros, Philippe (Lund U.) ; Gregersen, Anders Rhod (Aalborg U.) ; Lindemann, Jonas (Lund U. (main)) ; Saiz, Pablo (CERN) ; Zarochentsev, Andrey (St. Petersburg State U.)
Publication	2011
Number of pages	10
DOI	10.1007/978-1-4419-8014-4_16
Subject category	Computing and Computers
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	To reach its large computing needs, the ALICE experiment at CERN has developed its own middleware called AliEn, centralised and relying on pilot jobs. One of its strength is the automatic installation of the required packages. The Nordic countries have offered a distributed Tier-1 centre for the CERN experiments, where the job management should be done with the NorduGrid middleware ARC. We have developed an interoperation module to allow to unify several computing sites using ARC, and make them look like a single site from the point of view of AliEn. A prototype has been completed and tested out of production. This talk will present implementation details of the system and its performance in tests.

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