GIOD - Database of “real” LHC events
Caltech/HEP submitted a proposal to NPACI to generate ~1,000,000 fully-simulated multi-jet QCD events
- Using CMSIM on the Exemplar
- Directly study Higgs ? ?? backgrounds for first time
- Computing power of Exemplar makes this possible in ~few months
- Accepted in March ‘98.
Event production on the Exemplar since May 24th.
- ~0.6 TBytes of FZ files (~600,000 events) in HPSS
Used as copious source of “raw” LHC event data
- Files are read using the “ooZebra” utility developed in CMS
- Raw data objects (Tracker, Muon hit maps, ECAL, HCAL energy maps) created for each event and stored in Objy federated database
- Tracks and energy clusters reconstructed: new objects stored in the database
- Pattern matching creates “physics” objects like Jets, Photons and Electrons: stored in the database