Date Added: Jan 2013
Resource provisioning is one of the main challenges in large-scale resource sharing environments such as federated Grids. Recently, many resource management systems in these environments have started to use the lease abstraction and Virtual Machines (VMs) for resource provisioning. In resource sharing environments resource providers serve requests from external users along with their own local users. The problem arises when there are not sufficient resources for local users, who have higher priority than external ones, and need resources urgently. This problem could be solved by preempting leases from external users and allocating them to the local ones.