4/12/00M.Mazzucato – GR1 - Roma2 Main conclusion of the Hoffmann Review The Panel1 recommends the multi-tier hierarchical model proposed by Monarc as one key element of the LHC computing model with the majority of the resources not based at CERN : 1/3 in 2/3 out About equal share between Tier0 at CERN, Tier1s and lower level Tiers down to desktops Tier0 ier all Tier2 +… General consensus that GRID technologies developed by Datagrid can provide the way to efficiently realize this infrastructure All experiments should perform Data Challenges of increasing size and complexity until LHC start-up involving also Tier2 EU Testbed : 30-50% of one LHC experiment by 2003 (Match well with INFN Grid assumptions : 10% of final size for each experiment) Limit heterogeneity : OS = Linux + backup solution, Persistency = 2 tools max
{}