How much data?
Since BaBar started operation last May, we have recorded and analysed 210 million events.
- 48 million written to database
- remainder rejected after analysis
- At least 4 more years’ running and continually improving luminosity.
- Eventually record data at ~100 Hz; ~109 events/year.
- Each event uses 100-300kb.
- Also need to generate 1-10 times that number of simulated events.
Database currently holds 33 Tb
- Expect to reach ~300 Tb/year
- Ie. 1-2 Pb in the lifetime of the experiment.