Message processing on xml-based publish/subscribe systems

Message processing on xml-based publish/subscribe systems(2012)

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Abstract
With new innovations in information and communication, XML-based publish/subscribe systems have received more and more attention from academic communities and industries. In order to design a high-performance pub/sub system, this thesis considers the design of XML-based pub/sub systems from an integrated standpoint which includes using: caching technique, query aggregation algorithms, query routing algorithms, and networking. Existing research mainly focuses on the efficiency of filtering algorithms. Little research, however, has considered using computing in combination with network technologies in the context of XML filtering. First of all, this thesis proposes two caching schemes to be used in conjunction with an XML filtering engine. In addition, this thesis experiments with synthetic data and real data from web applications. Secondly, this thesis presents a novel algorithm for computing XPath query aggregation using a region encoding scheme. Extensive experiments have been performed to study the effectiveness of the proposed approaches and examine the trade-off between costs and gains. Thirdly, an innovative XML routing model, a peer model, is presented. This peer model can significantly improve the system throughput and scalability, and is robust for network changes.
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Key words
caching technique,XML-based pub,sub system,query routing algorithm,query aggregation algorithm,caching scheme,innovative XML routing model,XPath query aggregation,thesis experiment,message processing,existing research
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