D0 data processing within EDG/LCG
Van Leeuwen, W, Templon, J, Groep, D, Fisher, S, Bos, K, Mättig, P, Harenberg, T, Byrom, R · CERN Document Server (European Organization for Nuclear Research) · 2005
The DØ experiment at the Tevatron is collecting some 100 Terabytes of data each year and has a very high need of computing resources for the various parts of the physics program.DØ meets these demands by establishing a world wide distributed computing infrastructure -increasingly based on GRID technologies.Distributed resources are used for DØ MC production and data reprocessing of 1 billion events, requiring 250 TB to be transported over WANs.While in 2003 most of this computing at remote sites was distributed manually, some data reprocessing was performed with the EDG.In 2004 GRID tools are increasingly and successfully employed.We will report on performing data reprocessing using EDG's Application Testbed.We will explain how the DØ computing environment was linked to this GRID platform, and will discuss some lessons learned (for both Grid computing and preparing applications for distributed operation) from the DØ reprocessing on EDG, subjecting a generic Grid infrastructure to real data for the first time.An outlook on plans for applying LCG within DØ is given.