Before revision:  Currently, this is often done using simple threshold policies to reserve large parts of each cluster, which leads to low average utilizationof the cluster. In this paper, we propose more sophisticated policies for controlling admission to a cluster and demonstrate that they significantly increase cluster utilization.
After revision:  Currently, this is often done using simple threshold policies to reserve large parts of each cluster, which leads to low utilization. We propose more sophisticated policies for controlling admission to a cluster and demonstrate that they significantly increase cluster utilization.