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 data acquisition (DAQ) of the Compact Muon Solenoid (CMS) experiment at CERN, collects data for events accepted by the Level-1 Trigger from the different detector systems and assembles them in an event builder prior to making them available for further selection in the High Level Trigger, and finally storing the selected events for offline analysis. In addition to the central DAQ providing global acquisition functionality, several separate, so-called “MiniDAQ” setups allow operating independent data acquisition runs using an arbitrary subset of the CMS subdetectors.
During Run 2 of the LHC, MiniDAQ setups were running their event builder and High Level Trigger applications on dedicated resources, separate from those used for the central DAQ. This cleanly separated MiniDAQ setups from the central DAQ system, but also meant limited throughput and a fixed number of possible MiniDAQ setups. In Run 3, MiniDAQ-3 setups share production resources with the new central DAQ system, allowing each setup to operate at the maximum Level-1 rate thanks to the reuse of the resources and network bandwidth. Configuration management tools had to be significantly extended to support the synchronization of the DAQ configurations needed for the various setups.
We report on the new configuration management features and on the first year of operational experience with the new MiniDAQ-3 system.