Resource discovery in federated systems with voluntary sharing

Abstract

Federated system is a popular paradigm for multiple organizations to collaborate and share resources for common benefits. In practice, however, these organizations are often within different administrative domains and thus demand autonomous resource management, as opposed to blindly exporting their resources for efficient search. To address these challenges, we present a new resource discovery middleware, called ROADS, that can facilitate voluntary sharing. In ROADS, the participants can associate with each other at their own will and dictate the extent of sharing by properly exporting summaries, a condensed representation of their resource records. To enable efficient search, these summaries are aggregated and replicated along an overlayassisted server hierarchy, and the queries are routed to those servers that are likely to hold the desired resources. Our experimental results show that ROADS provides not only flexible resource sharing for federated systems but also efficient resource discovery, with performance comparable to a centrally managed system.

AYLLU : plataforma de cooperación mediada por agentes aplicada en un contexto de e-learning colaborativo : aprender a cooperar y cooperar para aprender

“…Otro administrador de recursos compartidos, denominado roads (Yang et al, 2007), se basa en el paradigma de los sistemas federados, en los que se comparten recursos, los cuales están en diferentes dominios y por tal razón requieren una "cabeza" que los maneje eficientemente. roads es un middleware que proporciona la localización de los recursos del sistema a través de servidores que forman una jerarquía de federados.…”

AYPUY: A resource management system for collaborative environments

“…Sin embargo, dichos agentes no son móviles, no se observan mecanismos de autenticación y/o autorización para manejar la confidencialidad de los recursos compartidos y su concepto de colaboración se limita a proporcionar acceso a los recursos en cualquier lugar o momento del estudiante y no se observan espacios de trabajo que amplíen dicha colaboración. Otro administrador de recursos compartidos, denominado ROADS [16], se basa en el paradigma de los sistemas federados, en los que se comparten recursos, los cuales están en diferentes dominios y por tal razón, demandan de una "cabeza" que los maneje eficientemente. ROADS es un middleware que proporciona la localización de los recursos del sistema a través de servidores que forman una jerarquía federados.…”

CLASP: Collaborating, Autonomous Stream Processing Systems

“…We intend to use ROADS [20], a resource discovery service, as the basis for this component. ROADS allows multiple sites to query and search for resource information from others.…”

“…Finally the RAEs possessing matching resource information will return it to the requesting site. The details about how summaries are produced and queries are evaluated against them can be found in [20].…”