Practical experience in ARDA with Atlas software and the prototype for the EGEE middleware - gLite

The ARDA project aims to provide end-to-end systems for physics analysis for the LHC experiments. In collaboration with the experiments, prototype systems are being developed that are based on the experimental software and on the middleware under development within the EGEE project â" gLite. The strategy of the ATLAS experiment is to develop high level services that supports physics analysis and simplifies grid usage for the physicist. A first implementation of such a service, DIAL, has already been developed and interfaces to conventional batch systems such as LSF or Condor. In this report first experiences using ATLAS software with the gLite prototype are described. The integration of ATLAS software components with the prototype is discussed. Some aspects of job execution, data management, metadata and Software installation are considered. A first implementation of a DIAL service based on the middleware prototype is demonstrated.