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A Distributed Control Law for Load Balancing in Content Delivery Networks

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3 Author(s)
Manfredi, S. ; Dipt. di Inf. e Sist., Federico II Univ. of Napoli, Naples, Italy ; Oliviero, F. ; Romano, S.P.

In this paper, we face the challenging issue of defining and implementing an effective law for load balancing in Content Delivery Networks (CDNs). We base our proposal on a formal study of a CDN system, carried out through the exploitation of a fluid flow model characterization of the network of servers. Starting from such characterization, we derive and prove a lemma about the network queues equilibrium. This result is then 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 in terms of its actual implementation in a real-world scenario. Finally, the overall approach is validated by means of simulations.

Published in:

Networking, IEEE/ACM Transactions on  (Volume:21 ,  Issue: 1 )