Structured Overlays
At the same time file sharing systems have been fighting to fill the void left by Napster, the research community has been exploring an alternative design for peer-to-peer networks. We refer to these networks as structured, to contrast them with the essentially random (unstructured) way in which a Gnutella network evolves. Unstructured overlays like Gnutella employ trivial overlay construction and maintenance algorithms, but the best they can offer is unreliable, random search. In contrast, structured overlays are designed to conform to a particular graph structure that allows reliable and efficient (probabilistically bounded delay) object location, in return for additional complexity during overlay construction and maintenance.
Structured OverlaysAt the same time file sharing systems have been fighting to fill the void left by Napster, the research community has been exploring an alternative design for peer-to-peer networks. We refer to these networks as structured, to contrast them with the essentially random (unstructured) way in which a Gnutella network evolves. Unstructured overlays like Gnutella employ trivial overlay construction and maintenance algorithms, but the best they can offer is unreliable, random search. In contrast, structured overlays are designed to conform to a particular graph structure that allows reliable and efficient (probabilistically bounded delay) object location, in return for additional complexity during overlay construction and maintenance.
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