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Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 76: Computing 1

T 76.3: Talk

Wednesday, February 29, 2012, 17:15–17:30, VG 0.111

Data access at Tier2s in ATLASAdil Aktas1, Guenter Duckeck2, Anton Gamel1, Torsten Harenberg3, •Sergey Kalinin3, Gen Kawamura4, Kai Leffhalm5, Joerg Meyer6, Andreas Petzold7, Cedric Serfon2, Jan-Erik Sundermann1, and Rodney Walker21Uni Freiburg, Freiburg im Breisgau — 2LRZ/LMU, München — 3BUW, Wuppertal — 4Uni Mainz, Mainz — 5DESY-ZN, Zeuthen — 6Goegrid, Göttingen — 7KIT/SCC, Karlsruhe

The LHC experiments have developed very complex and powerful data distribution systems which provide detailed information on overall data distribution and usage. However, this covers the actual data usage only partially, since access from locally submitted jobs is not included. A set of tools has been developed at Bergische Universitaet Wuppertal and Ludwig-Maximilians-Universitaet Munich to fill this gap for sites which use dCache as the storage system. These tools also provide means to obtain filtered accounting information and reveal data access patterns which are not available in the standard dCache monitoring. We will present the typical usage patterns for two Tier2 sites (BUW, LRZ) for the case of ATLAS but also other VOs active at BUW.

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