Andrew Gray, 13/03/2014 00:56:
For that matter, surely this data won't exist anyway before 2013 or so? I'm not sure how long we retain IP data for logged-in users, but I'd be a bit startled if it was five years.
EventLogging can contain almost anything I think. Is there any purging? I don't think so. Is it aggregate and anonymised? No longer. https://www.mediawiki.org/w/index.php?title=Extension:EventLogging&diff=prev&oldid=905171
Nemo