Design And Commissioning Of The First 32 Tbit/s Event-Builder

The LHCb experiment is a forward spectrometer, designed to study beauty and charm quarks Physics at the LHC. To exploit of higher luminosity that will be delivered during Run3, full needed substantial upgrade, from detector Data Acquisition (DAQ) High Level Trigger (HLT). In this paper, we focus on new DAQ system for experiment; represents paradigm shift compared previous one, similar systems used by experiments in past present times. overcome inefficiencies introduced local selection implemented directly with readout hardware, Run3 perform software reconstruction all produced events. achieve this, both HLT need process ~ 30 MHz event-rate. particular, paper introduce final design system; it provide hardware Event Building (EB) how integrated technologies Performance Computing (HPC) world - like InfiniBand HDR (200 Gb/s)- into performance measurements EB under different operational conditions; feedback operation beginning data-taking.