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Fourth IEEE International Symposium on Network Computing and Applications (2005)
Cambridge, Massachusetts
July 27, 2005 to July 29, 2005
ISBN: 0-7695-2326-9
pp: 91-100
Roberto Baldoni , Dipartimento di Informatica e Sistemistica - Universit`a di Roma "La Sapienza", Roma, Italy
Leonardo QuerzonI , Dipartimento di Informatica e Sistemistica - Universit`a di Roma "La Sapienza", Roma, Italy
Antonino Virgillito , Dipartimento di Informatica e Sistemistica - Universit`a di Roma "La Sapienza", Roma, Italy
Ricardo Jimenez-Peris , Universidad Politecnica de Madrid (UPM), Madrid, Spain
Marta Patino-Martýnez , Universidad Politecnica de Madrid (UPM), Madrid, Spain
ABSTRACT
<p>Peer-to-peer systems (P2P) have become a popular technique to architect decentralized systems. However, despite its popularity most P2P systems consist in simple applications such as file sharing or chat systems. The main reason is that more complex applications require levels of consistency that nowadays are not offered by P2P systems. In this paper, we explore how to provide consistency based on distributed mutual exclusion via quorum systems in DHTbased P2P networks. Our results show that quorum systems applied directly to such networks are not scalable due to the high traffic imposed onto the underlying network. The paper introduces some design principles for both quorum systems and protocols using them that help to boost their performance. These design principles consist in dynamic and decentralized selection of quorums and in the exposition and exploitation of internals of the DHT such as the finger table. We show that by combining both design principles it is possible to minimize the number of visited sites and the latency needed to obtain a quorum.</p>
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CITATION

L. QuerzonI, A. Virgillito, R. Jimenez-Peris, R. Baldoni and M. Patino-Martýnez, "Dynamic Quorums for DHT-based P2P Networks," Fourth IEEE International Symposium on Network Computing and Applications(NCA), Cambridge, Massachusetts, 2005, pp. 91-100.
doi:10.1109/NCA.2005.17
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