Small data is proposed as an alternative to 'big data'. Advantages of small data are among others: (1) allows to build more interconnected applications, (2) allows portable databases and (3) allows to evolve data in more fluent iterations.
Not being required to develop a schema before you build your application is a huge time saver. It enables quick prototyping and lets you mold the structure of your document as you delve into its different uses within your application.
FoundationDB is a new generation of NoSQL database. It's the first to provide scalability <em>and</em> multi-key ACID transactions. Its ordered key-value core can be adapted to expose a broad range of data models and capabilities. Build your application on a better foundation.