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Ver el documento (formato PDF)   Righetti, Claudio Enrique.  "Fallas de escalabilidad en Internet"  (2000)
Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires

This dissertation presents an Object Distribution System (ODS), a distributed system inspired by the ultra-large scale distribution models used in everyday life (e.g. food or newspapers distribution chains). Beyond traditional mechanisms of approaching information to readers (e.g. caching and mirroring), this system enables the publication, classification and subscription to volumes of objects (e.g. documents, events). Authors submit their contents to publication agents. Classification authorities provide classification schemes to classify objects. Readers subscribe to topics or authors, and retrieve contents from their local delivery agent (like a kiosk or library, with local copies of objects). Object distribution is an independent process where objects circulate asynchronously among distribution agents. ODS is designed to perform specially well in an increasingly populated, widespread and complex Internet jungle, using weak consistency replication by object distribution, asynchronous replication, and local access to objects by clients. ODS is based on two independent virtual networks, one dedicated to the distribution (replication) of objects and the other to calculate optimized distribution chains to be applied by the first network. The IRTF (Internet Research Task Force) has stated that resource discovery tools (RDT) have scalability problems. Danzing et. Al. has classified these problems in three dimensions: Data volume, number of users, and RDT diversity. Our work is focused on providing solutions to the lack of scalability mainly on the first two dimensions. The goal is to provide local access to relevant and pre-selected information; obtaining the best service from the ordered use of global interconnections where bandwidth is scarce, quality is unstable and network partitions occur too often; and providing a global and cooperative mechanism for content classification and qualification (meta-information). We focus on a model centered on communities or organizations that are producers and consumers of information: they may produce, classify, label, offer and publish information, and also look for and consume information produced by other distant communities. These interactions occur with a local (region, organization) service agent, while object distribution is done asynchronously, reliably and cooperatively among agents located anywhere in Internet. This model is appropriate because intra-community networking is usually adequate meanwhile external networking is usually poor and more expensive.
Título : Fallas de escalabilidad en Internet    
Autor : Righetti, Claudio Enrique
Director : Navarro Moldes, Leandro
Año : 2000
Editor : Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires
Filiación : Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales
Grado obtenido : Doctor en Ciencias de la Computación
Ubicación : Preservación - http://digital.bl.fcen.uba.ar/gsdl-282/cgi-bin/library.cgi?a=d&c=tesis&d=Tesis_3327_Righetti
Idioma : Español
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