BibTeX
@MISC{Garbacki_self-organizingsuper-peer,
author = {Paweł Garbacki and Dick H. J. Epema and Maarten Van Steen},
title = {Self-Organizing Super-Peer Networks},
year = {}
}
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Abstract
Abstract — Super-peer architectures exploit the heterogeneity of nodes in a peer-to-peer (P2P) network by assigning additional responsibilities to higher-capacity nodes. In the design of a superpeer network for file sharing, several issues have to be addressed: how client peers are related to super-peers, how super-peers locate files, how the load is balanced among the super-peers, and how the system deals with node failures. In this paper we introduce a self-organizing super-peer network architecture (SOSPNET) that solves these issues in a fully decentralized manner. SOSPNET maintains a super-peer network topology that reflects the semantic similarity of peers sharing content interests. Super-peers maintain semantic caches of pointers to files which are requested by peers with similar interests. Client peers, on the other hand, dynamically select super-peers offering the best search performance. We show how this simple approach can be employed not only to optimize searching, but also to solve generally difficult problems encountered in P2P architectures such as load balancing and fault tolerance. We evaluate SOSPNET using a model of the semantic structure derived from an 8-month traces of two large file-sharing communities. The obtained results indicate that SOSPNET achieves close-tooptimal file search performance, quickly adjusts to changes in the environment (node joins and leaves), survives even catastrophic node failures, and efficiently distributes the system load taking into account peer capacities. Index Terms — peer-to-peer, super-peer architectures, semantic clustering, self-organizing systems.
Keyphrases
self-organizing super-peer network client peer content interest search performance close-tooptimal file search performance account peer capacity select super-peers catastrophic node failure system load semantic clustering fault tolerance load balancing abstract super-peer architecture 8-month trace additional responsibility similar interest super-peer architecture several issue semantic structure semantic cache superpeer network difficult problem file sharing semantic similarity obtained result large file-sharing community higher-capacity node self-organizing super-peer network architecture self-organizing system super-peer network topology node failure p2p architecture node join simple approach index term peer-to-peer
