FU Berlin, Fachbereich Mathematik und Informatik, Institut für Informatik
Content-based addressing and routing is a new kind of network service
in which the destinations of a message, and therefore its routing, are
determined by the content of the message rather than on any
specialized addressing and routing information attached to, or
otherwise associated with, the message. We have studied content-based
addressing and routing in the context of our Siena project. Siena is
a wide-area publish/subscribe event notification service, which is a
general-purpose facility for asynchronously and implicitly conveying
information from generators of events to any and all parties
expressing interest in those events. Siena is designed as a
de-centralized service whose basis is a network that implements
content-based addressing and routing. In this talk I will briefly
introduce the interface of Siena, I will present the fundamental
algorithms and processing strategies that realize content-based
routing in Siena, and I will discuss some design issues for
content-based routing networks, including some intrinsic trade-offs
between scalability and expressiveness of the service.
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