CRAB on OSG

Description of the Activity

CMS-INFN is leading the development of CRAB, the CMS Remote Analysis Builder. This INFN effort is focused on the LCG infrastructure. DISUN (UFL) together with FNAL is repsonsible for adaptation of CRAB to OSG. This activity also informs the OSG-LCG interoperability effort. A first prototype of OSG-CRAB was used during service challenge 3 (sc3) to submit more than 18,000 analysis jobs across the six participating CMS tier-2 centers in the US. DISUN (UFL) was responsible for operations of this part of sc3 as described in detail here. In the context of CRAB submissions to OSG via the LCG resource broker, DISUN is driving the OSG-LCG interoperability for USCMS tier-2 sites. First successful submissions to UFL and UCSD via the LCG resource broker occured on February 6th, 2006.