S. Paterson

TL;DR: The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva).

TL;DR: An overview of the DIRAC system architecture and design choices is given to show how different components are put together to compose an integrated data processing system including all the aspects of the LHCb experiment - from the MC production and raw data reconstruction to the final user analysis.

TL;DR: The DIRAC Workload Management System provides one single scheduling mechanism for jobs with very different profiles, and organizes pending jobs in task queues, both for individual users and production activities to achieve an overall optimisation.

TL;DR: DIRAC3 as mentioned in this paper is a fully grid security compliant framework for building service oriented distributed systems; complete Pilot Job framework for creating efficient workload management systems; several subsystems to manage high level operations like data production and distribution management.

TL;DR: The recent developments to support Monte Carlo simulation, data processing and distributed user analysis in a consistent way across disparate compute resources including individual PCs, local batch systems, and the Worldwide LHC Computing Grid are described.