Pampoo: An Efficient Skip-Trie Based Query Processing Framework for P2P Systems

Meifang Li, Hongkai Zhu, Derong Shen, Tiezheng Nie, Yue Kou, Ge Yu

Abstract: In this paper, we present Pampoo, a novel distributed framework for efficient query processing in P2P systems. We propose a new locality preserving data structure Skip-trie as its substrate. Skip-trie incorporates the advantages of skip graph with features of traditional trie. Thus, Pampoo can efficiently support various types of queries such as range queries and k nearest neighbor queries. We study the time cost of search and update operations on Skip-trie structure under our Pampoo framework. We further briefly present a repairing strategy to boost the robustness of Pampoo system. Extensive experiments are conducted to verify the effectiveness and efficiency of our approach.