摘要
去除重复网页是网页爬取过程中必要的步骤,目前人们对网页去重方法的研究集中在基于网页内容相似的去重算法本身的准确性和算法复杂度上。论文提出一种面向大规模网页去重的三层分布式架构,其利用本地缓存、分布式缓存及分布式索引高效地判断重复网页,特别适用于网页内容更新频繁需要反复爬取的应用场景。实验分析结果表明论文提出的三层分布式架构可以支持分布式网络爬虫环境下大规模的网页去重需求,并且具有较好的可扩展性。
Duplicated web page detection is a necessary step.Currently,researchers focus on the accuracy and time complexity of duplicated web pages detection algorithms based on the similarity of web page content.A three layer distributed architecture for large-scale duplicated web page detection is proposed,which can detect duplicated web pages efficiently using the combination of local memory caches,distributed caches and distributed index.This architecture is especially applicable for those applications which need crawl the web pages repeatedly.The experimental results indicate our proposed architecture can satisfy the requirement of large scale duplicated web page detection in distribute web crawler application.Moreover,this architecture is scalable.
出处
《计算机与数字工程》
2015年第10期1751-1755,共5页
Computer & Digital Engineering
关键词
网页去重
网络爬虫
分布式架构
duplicated web page detection
web crawler
distribute architecture
