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http://issues.apache.org/jira/browse/NUTCH-173?page=comments#action_12375300 ]
Christophe Noel commented on NUTCH-173:
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We are TENS of nutch users using this precious patch.
Most of nutch users are not making whole-web search engine (too much hardware
needed) but are willing to develop dedicated search engines.
We crawl sometimes 1000, sometimes 25000 web servers and it really slow down
the crawling with 25000 entries in prefix-urlfilter.
This patch is NEEDED !
Christophe Noël
CETIC
Belgium
PerHost Crawling Policy ( crawl.ignore.external.links )
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Key: NUTCH-173
URL: http://issues.apache.org/jira/browse/NUTCH-173
Project: Nutch
Type: New Feature
Components: fetcher
Versions: 0.7.1, 0.7, 0.8-dev
Reporter: Philippe EUGENE
Priority: Minor
Attachments: patch.txt, patch08.txt
There is two major way of crawl in Nutch.
Intranet Crawl : forbidden all, allow somes few host
Whole-web crawl : allow all, forbidden few thinks
I propose a third type of crawl.
Directory Crawl : The purpose of this crawl is to manage few thousands of
host wihtout managing rules pattern in UrlFilterRegexp.
I made two patch for : 0.7, 0.7.1 and 0.8-dev
I propose a new boolean property in nutch-site.xml :
crawl.ignore.external.links, with false value at default.
By default this new feature don't modify the behavior of nutch crawler.
When you setup this property to true, the crawler don't fetch external links
of the host.
So the crawl is limited to the host that you inject at the beginning at the
crawl.
I know there is some proposal of new crawl policy using the CrawlDatum in
0.8-dev branch.
This feature colud be a easiest way to add quickly new crawl feature to
nutch, waiting for a best way to improve crawl policy.
I post two patch.
Sorry for my very poor english
--
Philippe
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