A policy evaluation tool for multisite resource management
Enterprises typically operate multiple data center sites, each handling workloads according to an enterprise-level strategy. Sharing resources across multiple sites (or enterprises) brings up several important problems. Each site may have its own policies that govern its interactions with other remote sites. Different policies impact the system performance in different ways, and site administrators and system designers need to understand the effects of a given set of policies on potential workloads. In this paper, we describe an analysis methodology that determines the impact of policies on workloads, and we present results and validation for a prototypical multisite resource sharing system. Our analytical tool is capable of evaluating complex policies on a large-scale system and permits independent policies for each site so that policy makers can quickly evaluate several alternatives and their effects on the workloads before deploying them.
resource sharing modeling and prediction performance of systems policy impact analysis distributed systems