EUDAT 3rd Conference Sustainability Session:Economic Sustainabilityof Digital Preservation - Prof. David Rosenthal, Chief Scientist LOCKSS, Stanford University Libraries - Wednesday 24th September 2014, Amsterdam, the Netherlands
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1. Economic Sustainability ofDigital Preservation David S. H. Rosenthal LOCKSS Program Stanford University Libraries http://www.lockss.org/ http://blog.dshr.org/ 2014 David S. H. Rosenthal
2. Journals move to the Web Access for current readers better: Links, search, data spreadsheets behind graphs, ... No need to go to the library Access for future readers worse: Not purchase but rental, no rent payment no access Not many copies, but one on shortlived rewritable media
3. Paper Libraries Interesting example of faulttolerance: Looselycoupled network of many independent peers Each storing a selection of available content On durable, somewhat tamperevident media Market in copies, fewer copies more care Easy to find a copy, hard to find all copies Interlibrary loan & copy to repair loss or damage
4. LOCKSS Program LOCKSS box acts as persistent Web cache: Crawls Web to preload with subscribed content If can't get publisher copy, readers get library copy Boxes cooperate to detect, repair loss & damage Timeline: 1998 NSF funded prototype 1999 NSF, Sun funded alpha: 1 journal, 15 boxes 2000 Mellon, Sun funded beta: ~40 libraries 2004 Production 2005 Mellon matching grant 2007 Sustainability!
5. LOCKSS: Businesses Develop & support use of LOCKSS software: Free & opensource, but pay for support (cf. Red Hat) ~150 libraries using the software Under contract, run CLOCKSS network: Dark archive of ejournals & ebooks Notforprofit managed jointly by publishers and libraries 12 nodes worldwide Triggered if unavailable from any publisher, CC license Certified Trustworthy Repository score 13/15 Technologies, Technical Infrastructure, Security 5/5
6. The HalfEmpty Archive Ejournals: less than half preserved ARL vs. Keepers: ~40% of serials preserved Faria et al.: