Using MongoDB With Drupal

Because of the database abstraction layer that was added in Drupal 7, it is fairly convenient to use a variety of database servers for the backend of your Drupal software. While the term "database abstraction layer" does sound rather sophisticated, and the code involved is certainly not insignificant, in layman's terms what this system does is provide a way for a Drupal developer and Drupal modules to work with its database without generally having to be concerned with what type of database it is.