GridPP Meeting Jan 2003 R. Hughes-Jones Manchester 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

GridPP Meeting Jan 2003 R. Hughes-Jones Manchester ATLAS Trigger/DAQ Real-time Use of GÉANT uWish to test remote processing for Level 3 Trigger uWay to make strong links on-off line Grids uCERN NBI Krakow Manchester involved uSlides from Bob Dobinson Dec 02 Trigger/DAQ Week uWould be part of DataGrid WP7 collaboration with Dante uWP7 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 An ATLAS TDAQ Candidate Architecture. uMessage 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 LARGE GE SWITCHES 152 SFIs Dual CPU ROBs FE/GE SWITCHES Scalable 1 to 4 ? ? SUPERVISORS FE Fast Ethernet GE Gigabit Ethernet DFM PSUEDO ROB GE SWITCHES 378 L2PUs Dual CPU Mbytes/s 72.8 Mbytes/s 18.9 Mbytes/s 75.2 Mbytes/s 3 Buffers to L2 processors and L3 event builder.

GridPP Meeting Jan 2003 R. Hughes-Jones Manchester Mbytes/s Mbytes/s Mbytes/s 0.19 Mbytes/s Mbytes/s EVENT FILTER FARMS Dual CPU CERN Network To Storage SFOs REMOTE FARMS BACK END MANAGER 57.5 Mbytes/s Control Network N SFIs L3 event builder to Filter farms and Storage.

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