Preface
Objective
We are now in the Big Data era, which is characterized by three Vs: Volume, Variety, and Velocity. This new VVV world not surprisingly follows the WWW one.
While large data volumes are not uncommon for traditional databases, it is mostly the other two Vs that spell trouble. When data structures vary or change rapidly, the classic database technology becomes not as useful. At the same time, NoSQL share is growing, though some say these are not even databases because they generally do not aim to support ad hoc queries or full-blown query languages. Proponents of NoSQL point out that ad hoc querying is not necessary for many applications, but rich data structures and high availability along with speed of access are paramount. ...
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