Author:
Amoiridis Vassileios,Behrens Ulf,Bocci Andrea,Branson James,Brummer Philipp,Cano Eric,Cittolin Sergio,Da Silva Almeida Da Quintanilha Joao,Darlea Georgiana-Lavinia,Deldicque Christian,Dobson Marc,Dvorak Antonin,Gigi Dominique,Glege Frank,Gomez-Ceballos Guillelmo,Gorniak Patrycja,Gutić Neven,Hegeman Jeroen,Izquierdo Moreno Guillermo,James Thomas Owen,Karimeh Wassef,Kartalas Miltiadis,Krawczyk Rafał Dominik,Li Wei,Long Kenneth,Meijers Frans,Meschi Emilio,Morović Srećko,Orsini Luciano,Paus Christoph,Petrucci Andrea,Pieri Marco,Rabady Dinyar Sebastian,Racz Attila,Rizopoulos Theodoros,Sakulin Hannes,Schwick Christoph,Šimelevičius Dainius,Tzanis Polyneikis,Vazquez Velez Cristina,Žejdl Petr,Zhang Yousen,Zogatova Dominika
Abstract
The Compact Muon Solenoid (CMS) experiment at CERN incorporates one of the highest throughput data acquisition systems in the world and is expected to increase its throughput by more than a factor of ten for High-Luminosity phase of Large Hadron Collider (HL-LHC). To achieve this goal, the system will be upgraded in most of its components. Among them, the event builder software, in charge of assembling all the data read out from the different sub-detectors, is planned to be modified from a single event builder to an orbit builder that assembles multiple events at the same time. The throughput of the event builder will be increased from the current 1.6 Tb/s to 51 Tb/s for the HL-LHC orbit builder. This paper presents preliminary network transfer studies in preparation for the upgrade. The key conceptual characteristics are discussed, concerning differences between the CMS event builder in Run 3 and the CMS Orbit Builder for the HL-LHC. For the feasibility studies, a pipestream benchmark, mimicking event-builder-like traffic has been developed. Preliminary performance tests and results are discussed.
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