The document discusses how MongoDB is used at VRT (the Belgian public broadcasting organization): - MongoDB version 2.4.9 is used with a replica set of 1 primary and 4 secondaries and secondary preferred read preference. - On the application side, JavaDriver 2.12 is used with no ORM, just BasicDbObject and QueryBuilder. Integration testing uses NoSQL Unit to insert test data and check results. - On the database side, all queries are indexed for performance and the replica set provides eventual consistency suitable for their application. System profiling and query explaining are used to determine useful indexes.