In Content Delivery Networks (CDNs) the challenging issue is defining and implementing an effective law for load balancing. In the proposed system an formal study of a CDN system is carried out through the exploitation of a fluid flow model characterization of the network of servers. It provides a lemma about the network queues equilibrium. The result is leveraged in order to devise a novel distributed and time-continuous algorithm for load balancing, which is also reformulated in a time-discrete version .The discrete formulation of the proposed balancing law is eventually discussed with the actual implementation in a real-world scenario. Finally, this is validated by the means of simulations.
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Content Delivery Network (CDN), control theory, request balancing.