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1.
Health And Performance Monitoring Of The Online Computer Cluster Of CMS / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa Perez, Jose Antonio (CERN) ; Deldicque, Christian (CERN) et al.
The CMS experiment's online cluster consists of 2300 computers and 170 switches or routers operating on a 24-hour basis. This huge infrastructure must be monitored in a way that the administrators are pro-actively warned of any failures or degradation in the system, in order to avoid or minimize downtime of the system which can lead to loss of data taking. [...]
CMS-CR-2012-158.- Geneva : CERN, 2012 - 8 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 042049 Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.042049
2.
Upgrade of the CMS Event Builder / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Cittolin, Sergio (UC, San Diego) ; Perez, J A Coarasa (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The Data Acquisition system of the Compact Muon Solenoid experiment at CERN assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GB/s. By the time the LHC restarts after the 2013/14 shut-down, the current computing and networking infrastructure will have reached the end of their lifetime. [...]
CMS-CR-2012-172.- Geneva : CERN, 2012 - 9 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 012039
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012039
3.
Distributed error and alarm processing in the CMS data acquisition system / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The error and alarm system for the data acquisition of the Compact Muon Solenoid (CMS) at CERN was successfully used for the physics runs at Large Hadron Collider (LHC) during first three years of activities. Error and alarm processing entails the notification, collection, storing and visualization of all exceptional conditions occurring in the highly distributed CMS online system using a uniform scheme. [...]
CMS-CR-2012-124.- Geneva : CERN, 2012 - 14 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 012038
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012038
4.
High availability through full redundancy of the CMS detector controls system / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Jose Antonio Coarasa (CERN) ; Deldicque, Christian (CERN) et al.
The CMS detector control system (DCS) is responsible for controlling and monitoring the detector status and for the operation of all CMS sub detectors and infrastructure. This is required to ensure safe and efficient data taking so that high quality physics data can be recorded. [...]
CMS-CR-2012-128.- Geneva : CERN, 2012 - 9 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 012041
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012041
5.
Status of the CMS Detector Control System / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Jose Antonio Coarasa (CERN) ; Deldicque, Christian (CERN) et al.
The Compact Muon Solenoid (CMS) is a CERN multi-purpose experiment that exploits the physics of the Large Hadron Collider (LHC). The Detector Control System (DCS) ensures a safe, correct and efficient experiment operation, contributing to the recording of high quality physics data. [...]
CMS-CR-2012-129.- Geneva : CERN, 2012 - 11 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 012023
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012023
6.
The CMS High Level Trigger System: Experience and Future Development / Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The CMS experiment at the LHC features a two-level trigger system. Events accepted by the first level trigger, at a maximum rate of 100 kHz, are read out by the Data Acquisition system (DAQ), and subsequently assembled in memory in a farm of computers running a software high-level trigger (HLT), which selects interesting events for offline storage and analysis at a rate of order few hundred Hz. [...]
CMS-CR-2012-147.- Geneva : CERN, 2012 - 9 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 012008
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012008

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