Delivering Social Multimedia Content with Scalability

Content Distribution Network (CDN) services are increasingly being used to enable the delivery of bandwindth-demanding large media data to end-users of multimedia content providers. Especially today that HTTP traffic ascribed to media circulating over Online Social Networks (OSNs) has grown, a social-awareness mechanism over a CDN becomes essential [15]. This mechanism aims to exploit patterns of social interactions of the users to reduce the load on the origin server, the traffic on the Internet, and ultimately improve the user experience. By addressing the issue of which content will be copied in the surrogate servers of a CDN, it ensures a near-optimal content diffusion placement. At the same time, it moderates the impact on bandwidth that the Big Data transmitted via OSNs has, offering scalable solutions to existing CDNs or OSNs providers. In this framework, we further address complementary efficient caching policies in the surrogate servers of the CDN infrastructure. We experimentally prove that the various caching schemes applied contribute toward maximization of CDN performance, while content replication costs are taken into consideration.

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