Séminaire conjoint CRT-Chaire de recherche du Canada en distributique

TITRE : Joint Object Placement and Request Routing in Content Distribution Networks

CONFÉRENCIER : Tolga Bektas, Chaire de recherche du Canada en distributique

DATE et ENDROIT : 17 février 2006, 10h30, salle 5441, Pavillon André-Aisenstadt, Campus de l'Université de Montréal

RESPONSABLE : Gilbert Laporte (343-6143)

RÉSUMÉ : This study addresses the joint problem of object placement and request routing in a so-called Content Distribution Network (CDN). A CDN is a technology used to efficiently distribute electronic content throughout an existing IP network. The problem consists of replicating content on the proxy servers and routing the requests for the content to a suitable proxy server in a Content Distribution Network such that the total cost of distribution is minimized. The problem is formulated as a nonlinear integer programming formulation and three linearizations for the proposed formulation are offered. Two approaches, one based on Benders decomposition and the other based on Lagrangean relaxation and decomposition, are proposed for the solution of the problem. Tests are conducted in comparing the linearizations as well as the solution approaches on randomly generated Internet topologies.