The following email has been sent to ERHAN, Samim:
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Dear Samim Erhan,
The submission of your abstract has been successfully processed.
Abstract submitted: https://indico.cern.ch/userAbstracts.py?confId=192695.
Status of your abstract: https://indico.cern.ch/abstractDisplay.py?abstractId=98&confId=192695.
See below a detailed summary of your submitted abstract:
Conference: Tipp 2014 - Third International Conference on Technology and Instrumentation in Particle Physics
Submitted by: ERHAN, Samim
Submitted on: 30 January 2014 10:56
Title: The new CMS DAQ system for run 2 of the LHC
Abstract content The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GByte/s to the high level trigger (HLT) farm. The HLT farm selects interesting events for storage and offline analysis at a rate of around 1 kHz. The DAQ system has been redesigned during the accelerator shutdown in 2013/14. The motivation is twofold: Firstly, the current compute nodes, networking, and storage infrastructure will have reached the end of their lifetime by the time the LHC restarts. Secondly, in order to handle higher LHC luminosities and event pileup, a number of sub-detectors will be upgraded, increasing the number of readout channels and replacing the off-detector readout electronics with a μTCA implementation. The new architecture will take advantage of the latest developments in the computing industry. For data concentration, 10/40 Gbit Ethernet technologies will be used, as well as an implementation of a reduced TCP/IP in FPGA for a reliable transport between custom electronics and commercial computing hardware. A 56 Gbps Infiniband FDR CLOS network has been chosen for the event builder with a throughput of ~4 Tbps. The HLT processing is entirely file based. This allows the DAQ and HLT systems to be independent, and to use the same framework for the HLT as for the offline processing. The fully built events are sent to the HLT with 1/10/40 Gbit Ethernet via network file systems. Hierarchical collection of HLT accepted events and monitoring meta-data are stored into a global file system. This paper presents the requirements, technical choices, and performance of the new system.
Summary
Primary Authors: MEIJERS, Frans (CERN) frans.meijers@cern.ch
Co-authors: BAWEJ, Tomasz Adrian (Warsaw University of Technology (PL)) tomasz.adrian.bawej@cern.ch BEHRENS, Ulf (Deutsches Elektronen-Synchrotron (DE)) ulf.behrens@cern.ch BRANSON, James Gordon (Univ. of California San Diego (US)) branson@ucsd.edu CHAZE, Olivier (CERN) olivier.chaze@cern.ch CITTOLIN, Sergio (Univ. of California San Diego (US)) sergio.cittolin@cern.ch DARLEA, Georgiana Lavinia (Massachusetts Inst. of Technology (US)) lavinia.darlea@cern.ch DELDICQUE, Christian (CERN) christian.deldicque@cern.ch Dr. DOBSON, Marc (CERN) marc.dobson@cern.ch DUPONT, Aymeric Arnaud (CERN) aymeric.dupont@cern.ch ERHAN, Samim (Univ. of California Los Angeles (US)) samim.erhan@cern.ch FORREST, Andrew Kevin (University of Kent (GB)) andrew.kevin.forrest@cern.ch GIGI, Dominique (CERN) dominique.gigi@cern.ch GLEGE, Frank (CERN) frank.glege@cern.ch GOMEZ CEBALLOS RETUERTO, Guillelmo (Massachusetts Inst. of Technology (US)) guillelmo.gomez.ceballos@cern.ch GOMEZ-REINO GARRIDO, Robert (CERN) robert.gomez-reino@cern.ch Dr. HEGEMAN, Jeroen (CERN) jeroen.hegeman@cern.ch HOLZNER, Andre Georg (Univ. of California San Diego (US)) andre.georg.holzner@cern.ch MASETTI, Lorenzo (CERN) lorenzo.masetti@cern.ch MESCHI, Emilio (CERN) emilio.meschi@cern.ch MOMMSEN, Remi (Fermi National Accelerator Lab. (US)) remigius.mommsen@cern.ch MOROVIC, Srecko (CERN) srecko.morovic@cern.ch NUNEZ BARRANCO FERNANDEZ, Carlos (CERN) carlos.nunez-barranco.fernandez@cern.ch O'DELL, Vivian (Fermi National Accelerator Lab. (US)) vivian.o'dell@cern.ch ORSINI, Luciano (CERN) luciano.orsini@cern.ch PAUS, Christoph (Massachusetts Inst. of Technology (US)) paus@mit.edu PETRUCCI, Andrea (CERN) andrea.petrucci@cern.ch PIERI, Marco (Univ. of California San Diego (US)) marco.pieri@cern.ch Dr. RACZ, Attila (CERN) attila.racz@cern.ch SAKULIN, Hannes (CERN) hannes.sakulin@cern.ch SCHWICK, Christoph (CERN) christoph.schwick@cern.ch STIEGER, Benjamin (CERN) stiegerb@cern.ch SUMOROK, Konstanty (Massachusetts Inst. of Technology (US)) konstanty.sumorok@cern.ch Mr. VEVERKA, Jan (Massachusetts Inst. of Technology (US)) jan.veverka@cern.ch ZEJDL, Petr (CERN) petr.zejdl@cern.ch
Abstract presenters: MEIJERS, Frans
Track classification: Data-processing: 3b) Trigger and Data Acquisition Systems
Presentation type: --not specified--
Comments: