HEP — Fermilab and CMS

• The Compact Muon Solenoid (CMS)

  • $750M Experiment being built at CERN in Switzerland
  • Will be active in 2007
  • Data rate from the detectors is ~1 PB/sec
  • Data rate after filtering is ~hundreds of MB/sec

• The Data Problem

  • Dataset for a single experiment is ~1PB
  • Several experiments per year are run
  • Must be made available to 5000 scientists all over the planet (Earth primarily)
  • Dense dataset, sparse data access by any one user
  • Access patterns are not deterministic

• HEP experiments cost $US 1B, last 20 years, involve thousands of collaborators at hundreds of institutions world-wide, and collect and analyze several petabytes of data per year

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