Speaker
D. Rebatto
(INFN - MILANO)
Description
In this paper we present an overview of the implementation of the LCG
interface for the ATLAS production system. In order to take profit
of the features provided by DataGRID software, on which LCG is based,
we implemented a Python module, seamless integrated into the Workload
Management System, which can be used as an object-oriented API to the
submission services. On top of it we implemented Lexor,an executor
component conforming to the pull/push model designed by the DC2
production system team. It pulls job descriptions from the supervisor
component and uses them to create job objects, which in turn are
submitted to the Grid. All the typical Grid operations (match-making
with respect to input data location, registration of output data in
the replica catalog, workload balancing) are performed by the
underlying middleware, while interactions with ATLAS metadata
catalog and the production database are granted by the integration
with the Data Management System (Don Quijote) client module and via
XML messages to the production supervisor (Windmill).
Primary authors
A. De Salvo
(INFN Roma)
C. Negri
(CNAF Bologna)
D. Rebatto
(INFN - MILANO)
L. Vaccarossa
(INFN Milano)
