The WLCG infrastructure provides the compute power and the storage capacity for the computing needs of the experiments at the Large Hadron Collider (LHC) at CERN. The infrastructure is distributed across over 170 data centers in more than 40 countries. The amount of consumed energy in WLCG to support the scientific program of the LHC experiments and its evolution depends on different factors: the luminosity of the LHC and its operating conditions, determining the data volume and the data complexity; the evolution of the computing models and the offline software of the experiments, considering the ongoing R&D program in preparation for the next LHC phase (HL-LHC); the computing hardware technology evolution in the direction of higher energy efficiency; the modernization of the facilities hosting the data centers, improving the Power Usage Efficiency. This contribution presents a study of the WLCG energy needs and their evolution for the continuation of the LHC program, based on the factors mentioned above. Some information is obtained from the CERN experience but can be extrapolated to the whole of WLCG. The study provides therefore a holistic view for the infrastructure rather than a detailed prediction at the level of the single facilities. It presents an accurate view of the trends and offers a model for more refined studies.
|Consider for long presentation||Yes|