A group-based content delivery network
Jaime Lloret, Miguel García, Diana Bri, Juan R. Díaz · 2008
It is known that a group-based system provides better performance and more scalability to the whole system while decreasing the communication traffic. Group-based architectures in Content Delivery Networks (CDNs) could be a good solution to the need of scalability. There is not any group-based CDN in existence, although we proposed in reference [1] a group-based system to interconnect CDNs of different providers. This article shows a Content Delivery Network based on grouping surrogates. We will show the benefits of our proposal and its application environment. We will describe the protocol developed to connect surrogates from the same group and from different groups. The neighbor selection algorithm is based on their proximity in order to provide lower content distribution times and trying to assure Quality of Service (QoS) by connecting to surrogates with higher available capacity. Real measurements of the network control traffic and of the performance of the surrogates will be shown. Finally we will show the differences with the system proposed in reference [1].