Hello! Part 3 of a series of articles I've been writing about the technology behind http://postabon.com http://postabon.com. This is about the persistence laye

Hello! Part 3 of a series of articles I've been writing about the technology behind http://postabon.com http://postabon.com. This is about the persistence layer (Elephant) I'm using - but I tried to make it a little more general so it could help non-Lisp programmers.