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

GridPP Meeting Jan 2003R. Hughes-Jones Manchester

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

Richard Hughes-JonesThe University of Manchester



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)


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


LARGE GE SWITCHES

152 SFIsDual CPU

2

1600 ROBs

FE/GE SWITCHES

Scalable 1 to 4 ? ?

SUPERVISORS

FE Fast Ethernet

GE Gigabit Ethernet

DFM

PSUEDO ROB

GE SWITCHES

378 L2PUsDual CPU

1 14

1 1600

1 27

1

8

1 38

1 4

1 38

5.2 Mbytes/s

72.8 Mbytes/s

18.9 Mbytes/s

75.2 Mbytes/s

3

Buffers to L2 processors and L3 event builder.


1 2 3 4 149 150 152151

1 50

75.2 Mbytes/s

1 38

57.2 Mbytes/s

1 2 3 30

1.9 Mbytes/s

0.19 Mbytes/s5.7 2 Mbytes/s

1 2 3 30

EVENT FILTER FARMS Dual CPU

CERNNetwork

ToStorage

SFOs

REMOTE FARMS

BACK ENDMANAGER

57.5 Mbytes/s

ControlNetwork N

SFIs

L3 event builder to Filter farms and Storage.


Nordunet

Darenet

CERN network

Polish National Network

GEANTPAN EuropeanGigabit ResearchNetwork

INP Krakow NBICopenhagen

BAT 513

Genevaairport

Lyngby

Poznan

Stockholm

1 GE

1 GE

1 GE

Manchester

SuperJANET

The Planned Network (some already going).

Documents

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