Scheduling strategies in federated grids

Résumé

The GridWay Metascheduler enables efficient sharing of computing resources managed by different LRM (Local Resource Management) systems, not only within a single organization, but also across several administrative domains. The possibility to access to the services available in different Globus based grids allows the union of grids to create a federation. This scenario has particular characteristics, possibly the most important one is that it has different types of users: internal users, external users, and direct users. Basically, all these users compete for the resources of the federated grid to achieve their own particular goals. However, GridWay is not providing the best scheduling strategy under this scenario, because its current scheduling policy does not take into account resource ownership. In this paper we introduce a variation of GridWay’s current scheduling strategy suitable to this new scenario. This variation is based on the parameters provided by a previously proposed performance model. In addition, the results obtained by simulation lead us to conclude that there is a real necessity to enhance scheduling policies in federated grids.