![]() ![]() We propose: (i) a complete analysis of the capabilities and limitations of the DIRAC Site Director (ii) several methods to speed up its execution, including parallel processing as well as bulk operations (iii) a comprehensive analysis of a group of Site Directors in the LHCb production environment during 12 months. ![]() This paper lays out an approach to increase the throughput of the jobs, on grid resources, by improving the performance of the Pilot-Job provisioning tools through a case study: the LHCb-specific solution, known as “DIRAC Site Director”. Yet, even though they have started to integrate their workflows on such infrastructures, LHC experiments still largely depend on WLCG resources. This sole approach will be insufficient and will need to be complemented to meet future computing needs – of the High-Luminosity LHC – and the rise of data generated over time: national science programs are consolidating computing resources and encourage using cloud and High-Performance Computing systems. LHC experiments have adopted the Pilot-Job paradigm, and deliver tools to supply grid resources with Pilot-Jobs, to efficiently leverage the computing power offered by WLCG. ![]() To study the constituents of matter, CERN mainly relies on the Worldwide LHC Computing Grid (WLCG), which processes petabytes of data coming from the Large Hadron Collider (LHC). ![]()
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