运行Nutch 1.10并且我在使用Nutch开发人员提供的抓取脚本时遇到了麻烦：
Usage: crawl [-i|--index] [-D "key=value"] <Seed Dir> <Crawl Dir> <Num Rounds>
-i|--index Indexes crawl results into a configured indexer
-D A Java property to pass to Nutch calls
Seed Dir Directory in which to look for a seeds file
Crawl Dir Directory where the crawl/link/segments dirs are saved
Num Rounds The number of rounds to run this crawl for
Example: bin/crawl -i -D solr.server.url=http://localhost:8983/solr/ urls/ TestCrawl/ 2
我想知道是否有人可以给我一些阅读本文的见解。例如：
-i|--index **What is the configured indexer? Is this part of Nutch? Or is it an another program like Solr? When I put in -i, what am I doing?**
-D **Not sure how these get used in the crawl but the instruction is pretty self-explanatory.**
Seed Dir **Self-explanatory but where do I put the directory within Nutch? I created a urls directory (per the instructions) in the apache-nutch-1.10 directory. I've also tried putting it in the apache-nutch-1.10/bin file because that is were the crawl starts from.**
Crawl Dir **Is this where the results of the crawl go or is there where the data for the injection to the crawldb goes? If its the latter where do I get said data? The directory starts out empty and never gets filled. Confusing!**
Num Rounds **Self-explanatory**
其他问题： 抓取的结果在哪里？他们是否必须去Solr核心（或其他一些软件）？他们可以去一个目录，所以我可以看看它们吗？ 他们出现了什么格式？
谢谢！
答案 0 :(得分：1)
-i：是一个类似Solr / ElasticSearch等的程序。因此，当您指定-i选项时，爬网脚本会运行索引作业，否则会跳过它。
Crawl Dir：是存储抓取数据的目录。这包括crawldb，segments和linkdb。所以基本上所有与抓取相关的数据都在这里。
抓取的结果会进入您指定的crawlDir。它存储为序列文件，并有命令来查看数据。
您可以在 - https://wiki.apache.org/nutch/CommandLineOptions找到它们。