Augmenting RDBMS with MongoDB for eCommerce

OpenSky has published a very interesting and detail presentation about augmenting a traditional RDBMS like MySQL with MongoDB for eCommerce. What exactly is OpenSky?

OpenSky is a social shopping platform that helps consumers discover and buy great products that fulfill their interests in Food, Style & Beauty, Healthy Living, and Home & Design.

The underlying theme of the presentation centers around polyglot persistence and the focus on choosing the right tool for the job. You'll see in the presentation where they have drawn the line between the need for traditional transactions and everything else, no seriously everything else is in NoSQL.