Experiment Dashboard: the monitoring system for the LHC experiments

In this paper we present the Experiment Dashboard monitoring system, which is currently in use by four Large Hadron Collider (LHC)[1] experiments. The goal of the Experiment Dashboard is to monitor the activities of the LHC experiments on the distributed infrastructure, providing monitoring data from the virtual organization/user perspectives. All LHC experiments are using various Grid infrastructures (LCG/EGEE, OSG, Nordugrid) with correspondingly various middleware flavors and job submission methods. Providing a uniform and complete view of the various activities like job processing, data movement and publishing, access to distributed databases regardless of the underlying Grid flavor is the challenging task. In this paper we will describe the solutions implemented in the Experiment Dashboard.