Someone recently made a cool proposal for utilizing diffs to save space taken by old versions in the Zope object database: http://www.zope.org/Members/jim/ZODB/ReverseDiffVersioning To make this work, we need a good way of diffing pickles. I thought maybe someone here would have some good suggestions. I do think that the topic is sort of interesting (for some definition of "interesting" ;). The page above is a Wiki page. (Wiki is awesome. If you haven't seen it before, check out http://joyful.com/zwiki/ZWiki.) If you are a member of zope.org, you can edit the page directly, which would be fine with me. :) Jim -- Jim Fulton mailto:jim@digicool.com Python Powered! Technical Director (888) 344-4332 http://www.python.org Digital Creations http://www.digicool.com http://www.zope.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.