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Nutch安装及入门学习教程
目 录
1. nutch简介.................................................................................................................................1
1.1什么是nutch.......................................................................................................................1
1.2研究nutch的原因...............................................................................................................1
1.3 nutch的目标.......................................................................................................................1
1.4 nutch VS lucene.................................................................................................................2
2. nutch的安装与配置.................................................................................................................3
2.1 JDK的安装与配置.............................................................................................................3
2.2 nutch的安装与配置...........................................................................................................5
2.3 tomcat的安装与配置.........................................................................................................5
3. nutch初体验..............................................................................................................................7
3.1 爬行企业内部网................................................................................................................7
3.1.1 配置nutch................................................................................................................7
3.1.2 配置tomcat..............................................................................................................8
3.1.3 执行抓取命令.........................................................................................................9
3.1.4 测试结果...............................................................................................................11
3.1.5 Intranet Recrawl.....................................................................................................13
3.2 爬行全网..........................................................................................................................18
3.2.1 nutch数据集的基本组成:......................................................................................18
3.2.2 爬行"官方"网址...............................................................................................18
3.2.3 爬行中文网址.......................................................................................................22
4. nutch基本原理分析...............................................................................................................23
4.1 nutch的基本组成.............................................................................................................23
4.2 nutch工作流程.................................................................................................................23
5. nutch工作流程分析...............................................................................................................25
5.1 爬虫.................................................................................................................................25
5.1.1 工作策略...............................................................................................................25
5.1.2 工作流程分析.......................................................................................................25
5.1.3 其它.......................................................................................................................27
5.2 索引.................................................................................................................................27
5.2.1 索引主要过程.......................................................................................................27
5.2.2 工作流程分析.......................................................................................................28
5.2.3 倒排索引(inverted index).....................................................................................29
5.2.4其它........................................................................................................................29
5.3 搜索.................................................................................................................................29
5.4 分析.................................................................................................................................30
5.5 nutch的其他一些特性.....................................................................................................31
6. nutch分析方法和工具...........................................................................................................33
6.1 Crawldb...........................................................................................................................33
6.2 Linkdb.............................................................................................................................35
6.3 Segments.........................................................................................................................35
6.4 Index................................................................................................................................39
7. nutch分布式文件系统...........................................................................................................41
2007-8-26 北京邮电大学-李阳
Nutch入门学习
7.1 概述.................................................................................................................................41
7.2 MapReduce...................................................................................................................41
7.3 文件系统语法..................................................................................................................42
7.4 文件系统设计..................................................................................................................42
7.5 系统的可用性..................................................................................................................43
7.6 Nutch文件系统工作架构.............................................................................................43
8. nutch应用...............................................................................................................................45
8.1 修改源码..........................................................................................................................45
8.2 插件机制---plugin...........................................................................................................45
8.2.1 什么是plugin.........................................................................................................45
8.2.2 使用plugin的好处.................................................................................................45
8.2.3 plugin工作原理......................................................................................................46
8.2.4 编写plugin............................................................................................................47
8.3 API接口............................................................................................................................53
8.3.1使用Nutch API.......................................................................................................53
8.3.2使用OpenSearch API.............................................................................................55
8.4 nutch的应用前景.............................................................................................................57
附录一: nutch的相关网站.........................................................................................................58
附录二: 参考文献.......................................................................................................................58
2010-11-20
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