this paper describes challenging requirements on the configuration service for the ATLAS experiment at CERN. It presents the status of the implementation and testing one year before the start of data taking, providing...
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this paper describes challenging requirements on the configuration service for the ATLAS experiment at CERN. It presents the status of the implementation and testing one year before the start of data taking, providing details of: 1. the capabilities of the underlying OKS object manager to store and to archive configuration descriptions, its user and programming interfaces; 2. the organization of configuration descriptions for different types of data taking runs and combinations of participating sub-detectors; 3. the scalable architecture to support simultaneous access to the service by thousands of processes during the online configuration stage of ATLAS; 4. the experience withthe usage of the configuration service during large scale tests, test beam, commissioning and technical runs. the paper also presents pro and contra of the chosen object-oriented implementation compared with solutions based on pure relational database technologies, and explains why after several years of usage we continue with our approach.
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