Date Added: Jan 2011
Performance of proxy caches for database federations that serve a large number of users is crucially dependent on its physical design. Current techniques automated or otherwise, for physical design depend on the identification of a representative workload. In proxy caches, however, such techniques are inadequate since workload characteristics change rapidly. This is remarkably shown at the proxy cache of SkyQuery, an Astronomy federation, which receives a continuously evolving workload. The authors present novel techniques for automated physical design that adapt with the workload and balance the performance benefits of physical design decisions with the cost of implementing these decisions.