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ATLAS Trigger/DAQ Real-time use of the Grid Network

ATLAS Trigger/DAQ Real-time use of the Grid Network. Richard Hughes-Jones The University of Manchester. ATLAS Trigger/DAQ Real-time Use of G É ANT. Wish to test remote processing for Level 3 Trigger Way to make strong links on-off line Grids CERN NBI Krakow Manchester involved

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ATLAS Trigger/DAQ Real-time use of the Grid Network

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  1. ATLAS Trigger/DAQ Real-time use of the Grid Network Richard Hughes-Jones The University of Manchester GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  2. GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  3. ATLAS Trigger/DAQ Real-time Use of GÉANT • Wish to test remote processing for Level 3 Trigger • Way to make strong links on-off line Grids • CERN NBI Krakow Manchester involved • Slides from Bob Dobinson Dec 02 Trigger/DAQ Week • Would be part of DataGrid WP7 collaboration with Dante • WP7 Response: • Would investigate aspects of interactive Grid computing • Would strengthen the collaboration with Dante • Does not use Middleware eg globus (but may well need AAA in the future) GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  4. An ATLAS TDAQ Candidate Architecture. • Message Flows: • L2PU request to ROBs. • SFI request to ROBs. • Super to L2PU. • Low rate ~ 230Hz / L2PU • Super to DFM. • Grouped accept+reject from L2 ~ 2 kHz 1Super to 1DMF • DMF to SFI . • Low rate ~ 20 Hz /SFI • DFM to ROB. • Mcast clears GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  5. 1600 ROBs 1600 1 FE Fast Ethernet 2 1 38 3 FE/GE SWITCHES GE Gigabit Ethernet SUPERVISORS 1 Scalable 1 to 4 ? ? DFM 8 PSUEDO ROB 75.2 Mbytes/s 72.8 Mbytes/s 27 GE SWITCHES 38 1 1 18.9 Mbytes/s 5.2 Mbytes/s 378 L2PUs Dual CPU 1 14 1 4 Buffers to L2 processors and L3 event builder. LARGE GE SWITCHES 152 SFIs Dual CPU GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  6. 1 50 1 1 2 2 3 3 30 30 L3 event builder to Filter farms and Storage. 1 2 3 4 149 150 151 152 SFIs SFOs CERN Network To Storage 1 38 Control Network 75.2 Mbytes/s 57.5 Mbytes/s N BACK END MANAGER 57.2 Mbytes/s 0.19 Mbytes/s REMOTE FARMS 5.7 2 Mbytes/s 1.9 Mbytes/s EVENT FILTER FARMS Dual CPU GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

  7. Lyngby Nordunet Stockholm Darenet Polish National Network Poznan 1 GE 1 GE GEANT PAN European Gigabit Research Network NBI Copenhagen INP Krakow SuperJANET Geneva airport CERN network 1 GE Manchester BAT 513 The Planned Network (some already going). GridPP Meeting Jan 2003 R. Hughes-Jones Manchester

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