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Web wide crawl with initial seedlist and crawler configuration from March 2011. This uses the new HQ software for distributed crawling by Kenji Nagahashi.
What’s in the data set:
Crawl start date: 09 March, 2011
Crawl end date: 23 December, 2011
Number of captures: 2,713,676,341
Number of unique URLs: 2,273,840,159
Number of hosts: 29,032,069
The seed list for this crawl was a list of Alexa’s top 1 million web sites, retrieved close to the crawl start date. We used Heritrix (3.1.1-SNAPSHOT) crawler software and respected robots.txt directives. The scope of the crawl was not limited except for a few manually excluded sites.
However this was a somewhat experimental crawl for us, as we were using newly minted software to feed URLs to the crawlers, and we know there were some operational issues with it. For example, in many cases we may not have crawled all of the embedded and linked objects in a page since the URLs for these resources were added into queues that quickly grew bigger than the intended size of the crawl (and therefore we never got to them). We also included repeated crawls of some Argentinian government sites, so looking at results by country will be somewhat skewed.
We have made many changes to how we do these wide crawls since this particular example, but we wanted to make the data available “warts and all” for people to experiment with. We have also done some further analysis of the content.
If you would like access to this set of crawl data, please contact us at info at archive dot org and let us know who you are and what you’re hoping to do with it. We may not be able to say “yes” to all requests, since we’re just figuring out whether this is a good idea, but everyone will be considered.

Matt Welch
The Middle East's breathtaking liberalization really isn't about us.
Jacob Sullum
Renters' privacy
Katherine Mangu-Ward
Making Whoopie
Peter Suderman
Four-letter fines
Ronald Bailey
Globalization Liberates
Armin Rosen
Seniors vs. peddlers
Radley Balko
iPod crackdown
Katherine Mangu-Ward
Campaign finance rules
Josh Brokaw
Farm subsidies and rental rates
Brian Doherty
Post-arrest searches
Katherine Mangu-Ward
Beating bird flu
Jacob Sullum
‘Material support' for terrorism
Radley Balko
Capital punishment in Illinois
Peter Suderman
Obama's regulatory reform
Stephen J. Smith
NYC taxi regulations
Brian Doherty
Follow-Up
Peter Suderman
Charles Oliver
Ronald Bailey
The Internet's vulnerability to attacks has been exaggerated.
Radley Balko
Despite what you may have read, it's safer to be a police officer today than it has been in 35 years.
Jacob Sullum
Excluding inactivity from the Commerce Clause still leaves Congress with far too much power.
Katherine Mangu-Ward
The irresistible force of school reform meets the immovable object of teachers unions.
Brink Lindsey
Are the good times really over for good?
Greg Beato
The U.S. Postal Service struggles to stay self-sufficient.
Veronique de Rugy
States should not be allowed to file for bankruptcy.
Tim Cavanaugh
Unemployment rates and other useless measurements
Daniel Akst
Self-control in the age of abundance
Nick Gillespie
"We have a 19th-century classroom model in the 21st century."
Nick Gillespie
"What Katrina did was it allowed us to think differently."
Nick Gillespie
"Monopolies don't want to have direct competition."
Nick Gillespie
"I'm very agnostic about what form choice must take."
Radley Balko
Stewart Rhodes on his controversial group the Oath Keepers and the orders they won't obey
Damon W. Root
Economist Walter E. Williams reflects on his long career battling Jim Crow, big government, and liberal orthodoxy.
Peter Suderman
The perennial right-wing plot to seize Hollywood from liberals
Brian Doherty
Scenes from the 38-year struggle to film Ayn Rand's famous novel
Brian Doherty
Katherine Mangu-Ward
Jesse Walker
Jacob Sullum
Radley Balko
Jesse Walker

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