EuroFGI Workshop on IP QoS and Traffic Control

Bulk data transfers in Grids require end-to-end performance guarantees as well as a reliable and efficient transfer mechanism. The specific traffic requirements and environment conditions need to be taken into account as the focus of resource utilization is shifting from power to network resources in data Grids. This article investigates network resource sharing in Grids, especially data Grids. The scheduling of advance resource reservations in Grids was proven to be NP-complete. The existing heuristics for the scheduling of bandwidth requests do not take communication and computation delays and communication overheads into account which are involved in the reliable transfers of such reservations. This paper proposes a flexible, reliable and realistic QoS Mechanism which maximizes acceptance rate and network resource utilization and demonstrates the performance improvement by documenting results of simulations.