Simulation framework for adaptive overlay content caching

Current Internet architecture is challenged by the overwhelming multiplication of available content and the increasing requirements of the content delivery applications. Content Delivery Networks have been playing a catalytic role in content delivery solutions, replicating (caching) content at the edges of the network. In this paper, we investigate the role and the benefits of a more flexible and adaptive form of overlay content replication, considering changing conditions such as the popularity and the size of the content objects. We have designed and simulated a cache evaluator framework which considers the external varying conditions and can provide guidance on the operations of in - network caches.