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