Compute Facilities at CERN
DAQ / Calibration
L2/L3 trigger processing
Reconstruction
Re-reconstruction (2-3 times per year)
CDR 80 Gb/s
Experiment - LHC Pit 8
CERN Computer Centre
Temporary store (10 TB)
for Raw Data and ESD
Calibration (5TB)
Data Storage and Analysis
Physics Analysis
MSS
Readout
Network
Data Taking
DAQ @ 200 Hz
Raw data 20 MB/s
ESD data 20 MB/s
SHUTDOWN
Reprocessing @ 600 Hz
Raw data 60 MB/s
ESD Data 60 MB/s
disk
RAW
ESD
AOD
TAG
Data and CPU
server
CPU farm
AOD TAG
to Regional Centres
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