Migration of a relational databases to NoSQL: The way forward

NoSQL databases are designed to solve data processing problems in volume. Growth data today pushes us to think about new concepts and approaches for converting data from a source database to a NoSQL database. This paper describes some approaches, methods of migration, database reverse engineering, and offers a migration approach from a relational database to a Document-oriented database NoSQL (MongoDB). The approach based on the achievement of a data model, from which we proceed to the migration of schema and data mapping, while ensuring the integrity constraints between collections.