From the submitted article: "But in making your decision, remember the database's limitations and the risks you face by branching off the relational path.

"For all other requirements, you are probably best off with the good old RDBMS. So, is the relational database doomed? Clearly not. Well, not yet at least."

So the answer is no. The article doesn't do justice to the theoretical rigor of the relational database model. An online posting with some interesting discussion of technical trade-offs in popular terms and links to other posts can be found at

http://highscalability.com/paper-dynamo-amazon-s-highly-avai...