1. Lazy Preservation, Warrick, and the Web Infrastructure
Frank McCown
Old Dominion University Computer Science Department Norfolk, Virginia, USA Internet Archive Tutorial JCDL 2007
Vancouver, BC June 19, 2007

2. Available at http://warrick.cs.odu.edu/
McCown, et al., Brass: A Queueing Manager for Warrick, IWAW 2007.
McCown, et al., Factors Affecting Website Reconstruction from the Web Infrastructure, ACM IEEE JCDL 2007.
McCown and Nelson, Evaluation of Crawling Policies for a Web-Repository Crawler, HYPERTEXT 2006.
McCown, et al., Lazy Preservation: Reconstructing Websites by Crawling the Crawlers, ACM WIDM 2006.
Available at

3. What Types of Websites Are Lost?
Marshall, McCown, and Nelson, Evaluating Personal Archiving Strategies for Internet-based Information, IS&T Archiving 2007.

4. Success of website recovery each week
*On average, we recovered 61% of a website on any given week.

5. Overlap with Internet Archive
Overall, IA contained only 46% of the resources available in SE caches

6. Web Server Recoverable Not Recoverable
Static files (html files, PDFs, images, style sheets, Javascript, etc.)
Web Infrastructure
Recoverable
config
Perl script
Dynamic page
Database
Not Recoverable

7. Injecting Server Components into Crawlable Pages
Erasure codes
HTML pages
Recover at least m blocks