Design and Performance Analysis of Resource Usage Service for LCG

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.