Resumen El sistema operativo Debian es una de las distribuciones de GNU/Linux más populares a dıa... more Resumen El sistema operativo Debian es una de las distribuciones de GNU/Linux más populares a dıa de hoy. Desde su nacimiento, hace una década, ha sufrido muchos cambios técnicos, estructurales y organizativos. Este artıculo pretende estudiar la ...
The increasing number of functionally similar services requires the existence of a non-functional... more The increasing number of functionally similar services requires the existence of a non-functional properties selection process based on the Quality of Service (QoS). Thus, in this article, authors focus on the provision of a QoS model, an architecture and an implementation which enhance the selection process by the annotation of Service Level Agreement (SLA) templates with semantic QoS metrics. This QoS model is composed by a specification for annotating SLA templates files, a QoS conceptual model formed as a QoS ontology and selection algorithm. This approach, which is backward compatible, provides interoperability among customer-providers and a lightweight alternative. Finally, its applicability and benefits are shown by using examples of Infrastructure services.
Abstract This paper faces the problem of searching in unstructured peer-to-peer (P2P) networks. I... more Abstract This paper faces the problem of searching in unstructured peer-to-peer (P2P) networks. It introduces a novel paradigm of self-organized dynamic overlays whose topology adapts to the particular traffic offered to the network. The proposed mechanism uses random walks for resource location and, under this assumption, can be proven to drive the system to an optimal configuration when the network is in very high or in very low load conditions. A fully functional implementation of a P2P system based on this approach has been ...
In this paper we introduce DANTE, an unstructured P2P system in which the topology of the underly... more In this paper we introduce DANTE, an unstructured P2P system in which the topology of the underlying overlay network can be dynamically adapted to the system conditions. Such an adaption is performed by the peers in an autonomous manner. DANTE uses a simple search mechanism based on random walks that, combined with the topology adaptation, allows it to work in a very efficient way. We have evaluated how DANTE behaves in practice, showing that it successfully adapts to varying system load conditions.
International Journal of Business Information Systems, 2010
... Juan Caceres is a Technological Specialist at the Middleware unit of Telefónica Investigación... more ... Juan Caceres is a Technological Specialist at the Middleware unit of Telefónica Investigación y Desarrollo (TID), Madrid, Spain ... per-use model in which guarantees are offered by the Infrastructure Provider by means of customized SLAs. Following a current research by Gartner: ...
Resumen El sistema operativo Debian es una de las distribuciones de GNU/Linux más populares a dıa... more Resumen El sistema operativo Debian es una de las distribuciones de GNU/Linux más populares a dıa de hoy. Desde su nacimiento, hace una década, ha sufrido muchos cambios técnicos, estructurales y organizativos. Este artıculo pretende estudiar la ...
The increasing number of functionally similar services requires the existence of a non-functional... more The increasing number of functionally similar services requires the existence of a non-functional properties selection process based on the Quality of Service (QoS). Thus, in this article, authors focus on the provision of a QoS model, an architecture and an implementation which enhance the selection process by the annotation of Service Level Agreement (SLA) templates with semantic QoS metrics. This QoS model is composed by a specification for annotating SLA templates files, a QoS conceptual model formed as a QoS ontology and selection algorithm. This approach, which is backward compatible, provides interoperability among customer-providers and a lightweight alternative. Finally, its applicability and benefits are shown by using examples of Infrastructure services.
Abstract This paper faces the problem of searching in unstructured peer-to-peer (P2P) networks. I... more Abstract This paper faces the problem of searching in unstructured peer-to-peer (P2P) networks. It introduces a novel paradigm of self-organized dynamic overlays whose topology adapts to the particular traffic offered to the network. The proposed mechanism uses random walks for resource location and, under this assumption, can be proven to drive the system to an optimal configuration when the network is in very high or in very low load conditions. A fully functional implementation of a P2P system based on this approach has been ...
In this paper we introduce DANTE, an unstructured P2P system in which the topology of the underly... more In this paper we introduce DANTE, an unstructured P2P system in which the topology of the underlying overlay network can be dynamically adapted to the system conditions. Such an adaption is performed by the peers in an autonomous manner. DANTE uses a simple search mechanism based on random walks that, combined with the topology adaptation, allows it to work in a very efficient way. We have evaluated how DANTE behaves in practice, showing that it successfully adapts to varying system load conditions.
International Journal of Business Information Systems, 2010
... Juan Caceres is a Technological Specialist at the Middleware unit of Telefónica Investigación... more ... Juan Caceres is a Technological Specialist at the Middleware unit of Telefónica Investigación y Desarrollo (TID), Madrid, Spain ... per-use model in which guarantees are offered by the Infrastructure Provider by means of customized SLAs. Following a current research by Gartner: ...
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