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Peer-to-peer systems have emerged as a robust, scalable and decentralized way to share and publish data. In this paper, we propose P-Ring, a new P2P index structure that supports both equality and range queries. P-Ring is fault-tolerant, provides logarithmic search performance even for highly skewed data distributions and efficiently supports large sets of(More)
New and emerging P2P applications require sophisticated range query capability and also have strict requirements on query correctness, system availability and item availability. While there has been recent work on developing new P2P range indices, none of these indices guarantee correctness and availability. In this paper, we develop new techniques that can(More)
Resource Description Framework (RDF) was designed with the initial goal of developing metadata for the Internet. While the Internet is a conglomeration of many interconnected networks and computers, most of today's best RDF storage solutions are confined to a single node. Working on a single node has significant scalability issues, especially considering(More)
1. INTRODUCTION Current peer-to-peer (P2P) indices are monolithic pieces of software that address only a subset of the desired func-tionality for P2P databases. For instance, Chord [6] provides reliability and scalability, but only supports equality queries. Skip Graphs [1] support equality and range queries, but only for one data item per peer. PePeR [4](More)
Bloom filters are probabilistic data structures that have been successfully used for approximate membership problems in many areas of Computer Science (networking, distributed systems, databases, etc.). With the huge increase in data size and distribution of data, problems arise where a large number of Bloom filters are available, and all the Bloom filters(More)
We present a modularized storage and indexing framework that cleanly separates the functional components of a P2P system, enabling us to tailor the P2P infrastructure to the specific needs of various Internet applications eat, without having to devise completely new storage management and index structures for each application.