NoSQL has recently become a buzzword in web development. Some projects use similar databases for architecture bottlenecks, while others fully migrate to them. Such databases differ from relational ones in simple architecture and high scalability. At the moment we are interested in MongoDB as one of the most popular NoSQL databases. We’ll try to highlight its strengths and weaknesses, consider some peculiarities of development, its application field in Drupal, and will try to understand the Map/Reduce term through a practical example.

MongoDB is something between a key-value storage (which is usually fast and scalable) and traditional relational databases (MySQL, PostgreSQL, etc.) that provide advanced queries and rich functionality.

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