Roger Jones: The ATLAS Computing Model Ankara, Turkey - 2 May 2008 13 ATLAS Data Management Model l Tier-1s send AOD data to Tier-2s l Tier-2s produce simulated data and send them to Tier-1s l In the ideal world (perfect network communication hardware and software) we would not need to define default Tier-1—Tier-2 associations l In practice, it turns out to be convenient (robust ) to partition the Grid so that there are default (not compulsory) data paths between Tier-1s and Tier-2s nFTS (File Transfer System) channels are installed for these data paths for production use nAll other data transfers go through normal network routes l In this model, a number of data management services are installed only at Tier-1s and act also on their associated Tier-2s: nVO Box nFTS channel server (both directions) nLocal file catalogue (part of DDM/DQ2)
{}