Abstract
Grid accounting requires usage information to be shared among sites across administrative domains. These shared usage information provides an assurance of resource/service utilization of jobs. LCG-RUS is being developed as a compatible implementation of RUS (Resource Usage Service) specification [http://www.doc.ic.ac.uk/-sjn5/GGF/draft-ggf-rus-service-l.pdf] defined by OGF (Open Grid Forum) working group. The main purpose of LCG-RUS is to provide a usage information management system for LCG (the Large Hadron Collider Grid) [http://lcg.web.cern.ch/LCG/], which is a multi-grid environment composed of three grid infrastructure peers, OSG (Open Science Grid) [http://www.opensciencegrid.org/], NorduGrid [http://www.nordugrid.org/], and EGEE (Enabling Grids for E-sciencE) [http://public.eu-egee.org/]. Rather than maintaining job usage information, LCG-RUS realize grid accounting in aggregate level, reporting usage information in summarized format, while providing on-demand job usage tracking facilities. The performance test results indicate a satisfactory performance and flexibility.
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