The Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving
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The Memento Tracer Framework addresses the challenge of balancing quality and scalability in web archiving by utilizing both crawler-based and human-driven approaches. It features capabilities for creating reusable traces of web resources and aims to optimize the quality of captures while maintaining efficient processing. Evaluation studies indicate its potential to achieve high-quality archiving across various datasets, despite inherent performance trade-offs.
The Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving
- 1. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Martin Klein Los Alamos National Laboratory martinklein0815@gmail.com @mart1nkle1n with Harihar Shankar (98point6) Lyudmila Balakireva (LANL) Herbert Van de Sompel (DANS) The Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving
- 2. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 A major challenge in web archiving: Scale vs. Quality
- 3. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 IA’s Scale! https://twitter.com/brewster_kahle/status/1016003169589981184
- 4. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 IA’s Scale!! https://twitter.com/brewster_kahle/status/1118172506777509890
- 5. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 IA’s Scale!!! https://twitter.com/brewster_kahle/status/1139700494748663809
- 6. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 IA’s Scale!!!! https://twitter.com/brewster_kahle/status/1170820482104348672
- 7. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Fidelity? http://web.archive.org/web/*/http://cnn.com
- 8. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Fidelity? http://web.archive.org/web/20190808041346/https://www.cnn.com/
- 9. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Fidelity? https://ws-dl.blogspot.com/2017/01/2017-01-20-cnncom-has-been-unarchivable.html
- 10. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Webrecorder’s Fidelity! https://webrecorder.io/martinklein/tpdl_test_collection/20190417221002/https://www.cnn.com/
- 11. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Webrecorder’s Fidelity!! https://twitter.com/ianmilligan1/status/1136703505442324481https://twitter.com/MellonFdn/status/1138811967060267011
- 12. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Webrecorder’s Scale? https://twitter.com/mart1nkle1n/status/1136705116738904067
- 13. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Scale vs. Quality • Crawler-based approaches scale well • Crawling quality is not always as desired • Human-driven approaches often result in great quality • Not necessarily designed for (web) scale
- 14. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Scale vs. Quality • Crawler-based approaches scale well • Crawling quality is not always as desired • Human-driven approaches often result in great quality • Not necessarily designed for (web) scale Memento Tracer http://tracer.mementoweb.org
- 15. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Memento Tracer Framework http://tracer.mementoweb.org Inspired by: • LOCKSS • Same automated approach for resources of a class • Webrecorder • Manual recording of web resources • Various attempts aimed at automating interactions/behaviors • E.g., Brozzler, Browsertrix
- 16. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Memento Tracer Framework http://tracer.mementoweb.org
- 17. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Memento Tracer Implementation • Client-side: • Tracer Chrome extension leveraging Selenium IDE • JSON-formatted Trace for download • Server-side: • Stormcrawler • Selenium (Chrome) with Tracer plug-in • WarcProxy • file-system storage for WARC files http://stormcrawler.net/ https://www.seleniumhq.org/projects/webdriver/ https://github.com/odie5533/WarcProxy
- 18. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Tracer Interactions https://github.com/mementoweb/memento_extensions
- 19. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Tracer Interactions https://github.com/mementoweb/memento_extensions
- 20. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Tracer Interactions https://github.com/mementoweb/memento_extensions
- 21. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Tracer Interactions https://github.com/mementoweb/memento_extensions
- 22. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Tracer Interactions https://www.slideshare.net/martinklein0815/evaluating-memento-service-optimizations
- 23. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Current Memento Tracer Capabilities • Single clicks/links • All links in an area • Repeated click on links, with stop condition • Slides • Pagination • Nested traces i.e., “trace in a trace” • Trace for portal A follow link to portal B execute trace for portal B • Identification of page/portal for which a trace exists by URI (pattern)
- 24. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Memento Tracer Benefits • Scalability • Trace created once is applicable to all web resources of the same class • Traces shared via repository (edits, versioning) • Quality • Trace used as set of instructions for browser-based capture framework • Resource boundary explicit • Tradeoff • Quality vs performance
- 25. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Evaluation of Scalability & Quality • Dataset made of GitHub repositories and Slideshare slide decks • 17,646 GitHub repositories (via changelog.com) • 12,280 Slideshare decks (via Explore feature) • Archival goals: • GitHub: get all repository files and ZIP file • Slideshare: get all slides and notes • Quality eval: • Compare against Webrecorder • Scalability eval: • Large amount of high-quality captures • Compare against crawl time of common crawler
- 26. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Quality • Not a trivial dimension to evaluate! • Decision to evaluate by amount of URIs in live web version vs. archived snapshot • Based on manually generated snapshots with Webrecorder • Random sample of 100 repos and slide decks • Expectation: • 100% of URIs from live web in archived snapshot
- 27. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Quality 100 @ GitHub 100 @ Slideshare
- 28. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Quality at Scale 17,646 @ GitHub 12,280 @ Slideshare
- 29. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Cost of Quality at Scale • Runtime difference between Memento Tracer and common web crawler for the same amount of URIs • Plus 20 seconds per URI, on average • Faster than previous approaches, discovers many more URIs
- 30. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Take aways • Memento Tracer aims at finding a balance between quality and scale • Human in the loop, benefits from patterns of web resources • Experiments provide indicators for high quality, reliability, scale • Cost involved, slower than simple crawlers • Optimizations possible, further potential and limitations to be explored
- 31. Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving @mart1nkle1n TPDL, Oslo, Norway, September 10 2019 Martin Klein Los Alamos National Laboratory martinklein0815@gmail.com @mart1nkle1n with Harihar Shankar (98point6) Lyudmila Balakireva (LANL) Herbert Van de Sompel (DANS) The Memento Tracer Framework: Balancing Quality and Scalability for Web Archiving