[softwaredoug]

I had a (low traffic) app with Redis as the only data store, that we'd periodically dump to disk and copy the dump off for backup. It was... not great for anyone who was used to maintaining a normal web app. And it broke down because the underlying relationships we mostly cared about were, in fact, relational. So you got a lot of duplication / nesting, homegrown hierarchy, or pointers to other areas in Redis...