S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February International data management: The experience of the Auger Collaboration S. J. Sciutto Departamento de Física and IFLP/CONICET Universidad Nacional de La Plata La Plata, Argentina LISHEP2004 Rio de Janeiro, February 2004

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February The Auger Collaboration  2 Observatories  19 Countries  50+ Institutions  300+ People Southern hemisphere: Malargüe Mendoza, Argentina Northern hemisphere: Millard county Utah, USA

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February The Auger hybrid detector  3000 km 2 surface array.  4 fluorescence eyes.  Detector cross calibration with hybrid events.

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February SD local station Three 8” PM Tubes Plastic tank White light diffusing liner 12 m 3 of de-ionized water Comms. antenna GPS antenna Battery box SD array:  Hexagonal grid of 1600 stations  1500 m between neighbour stations Solar panel and electronics box

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Fluorescence detectors 33 telescope units. 3.4 meter diameter mirrors. 440 PMTs per camera. Operate in clear moonless nights (10% duty cycle)

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Malargüe FD Ethernet R R R 34Mbs SD Ethernet LSX BSU LS Pm Fd Inet – I2 R High Speed Switch CDAS cluster Campus Ethernet gateway Non-IP traffic Non-Routable IP traffic Routable IP traffic (René Bilhaut LAL & SJS) Private IP CLASS B x.x official IP CLASS C

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Auger southern observatory networks SD digital radio links FD and SD microwave links CDAS and campus LAN Link Malargüe – Buenos Aires Access to Internet Access to Internet 2 Designed, built and maintained by Auger Provided by RETINA

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Auger data mirroring system Auger countries CDAS at Malargüe Observatory RETINA (Buenos Aires) 1 Mbps link Malargüe- Buenos Aires Primary mirror at Lyon, France Mirror at Fermilab, USA AMPATH link Argentina-USA

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Malargüe Observatory gets connected Before Dial-up connection via a long distance call ( and basic services only). Survey of available alternatives for an Internet link. Main difficulty: The last mile Comissioning of 128 kbps full duplex dedicated satellite link with RETINA (Buenos Aires): Full internet services become available at Malargüe The Engineering array prototype starts taking data. The mirroring system enters in operation Upgrading domestic link to 1 Mbps (Microwave + fiber optics). Auger enters Internet 2. Now. Data mirroring system in production phase (120 GB transmitted so far). Current data flow (50 MB/day) is low (only 10% of the SD detectors operative) and expected to grow in the future to 1 TB/yr. Users’ requirements increase continously.

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February Computer simulations and data analysis  Computer simulations are essential for interpreting the real data.  Large CPU and storage requirements.  Basic simulated data is generated and stored at Fermilab and Lyon. Approximately 200 CPU years have already been used to produce about 6 TB of data.  Analysis of simulated data performed at the production centers.

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February TB across the Atlantic, steered from Argentina The excercise: Copy 25,000 individual data sets of mean size 40 MB (total size 1 TB) from FNAL’s MSS to Lyon. Operations performed from La Plata, Argentina.

S. J. Sciutto (Auger Collaboration) - LISHEP2004, Rio de Janeiro, February International data management at the Auger Collaboration Conclusions  The task of providing a reliable internet connection to a location like the Auger Southern Observatory was carried up successfully.  The major difficulty was related to the last mile issue.  The link proved to be essential for the development of the Observatory.  The quality of the communications with institutions within I2 is, at present, very good; but the links to some institutions in developing countries need to be improved.