The growing demand for Web and multimedia content accessed through heterogeneous devices requires the providers to tailor resources to the device capabilities on-the-fly. Providing services for content adaptation and delivery opens two novel challenges to the present and future content provider architectures: content adaptation services are computationally expensive; the global storage requirements increase because multiple versions of the same resource may be generated for different client devices. We propose a novel two-level distributed architecture for the support of efficient content adaptation and delivery services. The nodes of the architecture are organized in two levels: thin edge nodes on the first level act as simple request gateways towards the nodes of the second level; fat interior clusters perform all the other tasks, such as content adaptation, caching and fetching. Several experimental results show that the Two-level architecture achieves better performance and scalability than that of existing flat or no cooperative architectures.

A two-level distributed architecture for the support of content adaptation and delivery services / Canali, Claudia; Colajanni, Michele; Lancellotti, Riccardo. - In: CLUSTER COMPUTING. - ISSN 1386-7857. - STAMPA. - 13:1(2010), pp. 1-17. [10.1007/s10586-009-0094-y]

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