The Knot is a wedding planning website founded in 1996 that reaches 11 million users per month. It provides articles, tools, forums and other resources to help couples plan weddings. The director of software architecture, Jason Sirota, presented on the company's migration from a sharded SQL architecture to using multiple document databases like MongoDB in the cloud. This improved scalability and allowed integrating new data types more easily. MongoDB was chosen over other options as the primary document store. Challenges included dealing with differences in how UUIDs are stored between languages and initial driver errors. Load testing showed the new architecture could handle significantly more queries per minute than originally tested.