4.2. Big Data integration requirements in Cloud environments

Most of the data-intensive applications deployed in cloud environments question the “one size fits all” [STO 05] data management principles and promote the use of specialized Cloud data management infrastructures, also known as NoSQL systems. These solutions are able to perform orders of a magnitude that is better than the traditional (and generic) relational DBMS. NoSQL, which stands for Not only SQL, refers to a new generation of data stores. Unlike relational data stores, they are not standardized. Indeed, each NoSQL data store has its own data model, its own query language, its own API, etc. They are mostly open-source, schema-less, largely distributed database systems that enable rapid, ad-hoc organization and analysis of extremely high-volume, disparate data types [SAD 12]. They mainly come from web companies developing very highly intensive web applications such as Facebook, Amazon and Twitter. NoSQL data...