Dynamic Placement of Content Replicas in Distributed Multimedia Systems

We present in this article a multimedia content replica management system, able to satisfy users' constraints and preferences, while limiting the load of the servers and the proxy-caches. Our goal is to optimize the placement of a limited number of replicas via mechanisms of duplication and migration. Our system allows owners to keep control over their multimedia contents even with large scale replica dissemination. We developed an advanced model for integrating multiple metrics on the execution context to better suit the dynamicity inherent to distributed applications. Experiments on simulated networks of proxy-caches validate the approach.