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Sophia: An information plane for networked systems (2004)

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by Mike Wawrzoniak , Larry Peterson , Timothy Roscoe
Citations:97 - 7 self
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BibTeX

@MISC{Wawrzoniak04sophia:an,
    author = {Mike Wawrzoniak and Larry Peterson and Timothy Roscoe},
    title = {Sophia: An information plane for networked systems},
    year = {2004}
}

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Abstract

This paper motivates and describes an example network Information Plane, called Sophia, currently deployed on PlanetLab. Sophia is a distributed system that collects, stores, propagates, aggregates, and reacts to observations about the network’s current conditions. Sophia’s approach is novel: it can be viewed as a multi-user distributed expression evaluator in which sensors and actuators form the ground terms, and statements take on the complete expressiveness of a logic language like Prolog. This paper argues that this approach has several advantages in managing and controlling a complex, federated, and evolving network: (1) a declarative logic language provides a natural way to express the kinds of statements that are common to this application domain, through temporal and positional logic rules, facts and expressions; and (2) distributed evaluation of such logic expressions provides many opportunities for performance optimization yielding an efficient system.

Keyphrases

networked system    information plane    logic expression    expression evaluator    complete expressiveness    ground term    network current condition    application domain    positional logic rule    performance optimization    many opportunity    example network information plane    efficient system    declarative logic language    sophia approach    distributed system    several advantage    natural way    logic language   

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