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Scale-adaptable recrawl strategies for DHT-based distributed web crawling system

  • School of Computer Science and Technology, Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Large scale distributed Web crawling system using voluntarily contributed personal computing resources allows small companies to build their own search engines with very low cost. The biggest challenge for such system is how to implement the functionalities equivalent to that of the traditional search engines under a fluctuating distributed environment. One of the functionalities is incremental crawl which requires recrawl each Web site according to the update frequency of each Web site's content. However, recrawl intervals solely calculated from change frequency of the Web sites may mismatch the system's real-time capacity which leads to inefficient utilization of resources. Based on our previous works on a DHT-based Web crawling system, in this paper, we propose two scale-adaptable recrawl strategies aiming to find solutions to the above issue. The methods proposed are evaluated through simulations based on real Web datasets and show satisfactory results.

Original languageEnglish
Title of host publicationNetwork and Parallel Computing - IFIP International Conference, NPC 2010, Proceedings
Pages91-105
Number of pages15
DOIs
StatePublished - 2010
Externally publishedYes
EventIFIP International Conference on Network and Parallel Computing, NPC 2010 - Zhengzhou, China
Duration: 13 Sep 201015 Sep 2010

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume6289 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

ConferenceIFIP International Conference on Network and Parallel Computing, NPC 2010
Country/TerritoryChina
CityZhengzhou
Period13/09/1015/09/10

Keywords

  • DHT
  • Distributed Web crawling
  • incremental crawl
  • search engine

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