利用Metadata增加unstructured P2P系統之查詢效率

Expedite the Query Processes With Metadata in Unstructured P2P Systems

邱冠瑜(Guan-Yu Chiu)

指導教授 ： 陳宜欣

國立清華大學/電機資訊學院/資訊工程學系/碩士(2007年)

摘要

摘要

現今在P2P系統上，如何有效的存取資料是一個重要的課題，為了能夠快速的在P2P上找到想要的資料，我們需要在中央系統上保存一些額外的global資訊來幫助搜尋，可是維持這些global資訊的完整性和及時性是非常困難的，在我們的研究中，提出了一套系統將這些global資訊散佈到底下的peer上以減少要維持這些資訊的額外費用以及缺點，透過這些global資訊，我們可以減少整個系統所產生的traffic並增加查詢的正確率，從實驗可以看到，我們的系統是可以比以往的研究更有效的減少traffic並提升正確率。

關鍵字

分散式Metadata ； 查詢 ； P2P系統

並列摘要

Abstract

The research of retrieving data in peer-to-peer (P2P) systems has become more and more important in many research communities nowadays. In order to search the resources in P2P systems, it is required to keep the global information that is usually maintained in few central servers; however, the maintenance overhead is relatively severe. In this work, we propose a framework that can distribute the global information in P2P systems with minimum maintenance overhead. By distributed the information in P2P systems, the framework can expedite the query processes and reduce the traffic load. The experimental results show our framework outperforms other methods in traffic and accuracy.

並列關鍵字

Query ； Distributed metadata ； P2P

參考文獻

[6] V. Cross. Fuzzy semantic distance measures between ontological

of the Fifth IEEE/ACM International Workshop

on Grid Computing, pages 76–83, Washington, DC, USA,

2004. IEEE Computer Society.

[8] S. Joseph. P2p metadata search layers.