Kangasharju, Jussi ; Roberts, James ; Ross, Keith (2002)
Object Replication Strategies in Content
Distribution Networks.
In: Computer Communications, 25 (4)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Recently the Internet has witnessed the emergence of content distribution networks (CDNs). In this paper we study the problem of optimally replicating objects in CDN servers. In our model, each Internet Autonomous System (AS) is a node with finite storage capacity for replicating objects. The optimization problem is to replicate objects so that when clients fetch objects from the nearest CDN server with the requested object, the average number of ASs traversed is minimized. We formulate this problem as a combinatorial optimization problem. We show that this optimization problem is NP complete. We develop four natural heuristics and compare them numerically using real Internet topology data. We find that the best results are obtained with heuristics that have all the CDN servers cooperating in making the replication decisions. We also develop a model for studying the benefits of cooperation between nodes, which provides insight into peer-to-peer content distribution.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2002 |
| Autor(en): | Kangasharju, Jussi ; Roberts, James ; Ross, Keith |
| Art des Eintrags: | Bibliographie |
| Titel: | Object Replication Strategies in Content Distribution Networks |
| Sprache: | Deutsch |
| Publikationsjahr: | 2002 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Computer Communications |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 4 |
| Kurzbeschreibung (Abstract): | Recently the Internet has witnessed the emergence of content distribution networks (CDNs). In this paper we study the problem of optimally replicating objects in CDN servers. In our model, each Internet Autonomous System (AS) is a node with finite storage capacity for replicating objects. The optimization problem is to replicate objects so that when clients fetch objects from the nearest CDN server with the requested object, the average number of ASs traversed is minimized. We formulate this problem as a combinatorial optimization problem. We show that this optimization problem is NP complete. We develop four natural heuristics and compare them numerically using real Internet topology data. We find that the best results are obtained with heuristics that have all the CDN servers cooperating in making the replication decisions. We also develop a model for studying the benefits of cooperation between nodes, which provides insight into peer-to-peer content distribution. |
| Fachbereich(e)/-gebiet(e): | 20 Fachbereich Informatik 20 Fachbereich Informatik > Telekooperation |
| Hinterlegungsdatum: | 31 Dez 2016 12:59 |
| Letzte Änderung: | 03 Jun 2018 21:29 |
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