Performance evaluation of redirection schemes in content distribution networks

  • Authors:
  • J Kangasharju;K.W Ross;J.W Roberts

  • Affiliations:
  • Institut Eurécom, B.P. 193, Sophia Antipolis, France;Institut Eurécom, B.P. 193, Sophia Antipolis, France;France Télécom R and D Issy les Moulineaux, France

  • Venue:
  • Computer Communications
  • Year:
  • 2001

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Abstract

Content distribution on the Web is moving from an architecture where objects are placed on a single, designated server to an architecture where objects are replicated on geographically distributed servers and clients transparently access a nearby copy of an object. In this paper we study how the different redirection schemes used in modern content distribution networks affect the user-perceived performance in normal Web page viewing. Using both simulations and experiments with real Web servers we show that redirection schemes that require clients to retrieve different parts of a Web page from different servers yield sub-optional performance compared to schemes where a client accesses only one server for all the parts of a Web page. This implies that when replicating Web pages, we should treat the whole page (HTML and images) as a single entity.