Affiliations: Departamento de Arquitectura de Computadores y Automática, Facultad de Informática, Universidad Complutense de Madrid, 28040 Madrid, Spain | Universidad Politécnica de Madrid, Madrid, Spain
Note:  This research was supported by Consejería de Educación de la Comunidad de Madrid, Fondo Europeo de Desarrollo Regional (FEDER) and Fondo Social Europeo (FSE), through BIOGRIDNET Research Program S-0505/TIC/000101, and by Ministerio de Educación y Ciencia, through the research grant TIN2006-2806.
Abstract: In order to achieve a reasonable degree of performance and reliability, Metascheduling has been revealed as a key functionality of the grid middleware. The aim of this paper is to provide a comparative analysis between two major grid scheduling philosophies: a semi-centralized approach, represented by the EGEE Workload Management System, and a fully distributed approach, represented by the Grid Way Metascheduler. The distributed approach follow a loosely-coupled philosophy for the Grid resembling the end-to-end principle, which has fostered the spectacular development and diffusion of the Internet and, in particular, Web technologies in the past decade. The comparative is both theoretical, through a functionality checklist, and experimental, through the execution of a fusion physics plasma application on the EGEE infrastructure. This paper not only includes a standard analysis with the obtained times, but also a complex analysis based on a performance model.