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Tier2 Centre ~1 TIPS

1 TIPS = 25,000 SpecInt95 PC ( 1999 ) = ~15 SpecInt95. ~PBytes/sec. Online System. ~100 MBytes/sec. Offline Farm ~20 TIPS. One bunch crossing per 25 ns 100 triggers per second Each event is ~1 Mbyte. ~100 MBytes/sec. Tier 0. CERN Computer Centre >20 TIPS.

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Tier2 Centre ~1 TIPS

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  1. 1 TIPS = 25,000 SpecInt95 PC (1999) = ~15 SpecInt95 ~PBytes/sec Online System ~100 MBytes/sec Offline Farm~20 TIPS • One bunch crossing per 25 ns • 100 triggers per second • Each event is ~1 Mbyte ~100 MBytes/sec Tier 0 CERN Computer Centre >20 TIPS ~ Gbits/sec or Air Freight HPSS Tier 1 RAL Regional Centre US Regional Centre Italian Regional Centre French Regional Centre HPSS HPSS HPSS HPSS Tier 2 Tier2 Centre ~1 TIPS Tier2 Centre ~1 TIPS Tier2 Centre ~1 TIPS ScotGRID++ ~1 TIPS Tier 3 ~Gbits/sec Physicists work on analysis “channels” Each institute has ~10 physicists working on one or more channels Data for these channels should be cached by the institute server Institute ~0.25TIPS Institute Institute Institute Physics data cache 100 - 1000 Mbits/sec Tier 4 Workstations

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