The following three are the major contributors of the NoSQL
movement [1]:
I. BigTable (Google) started in 2004 by Google.
II. Dynamo: Amazon’s Highly Available Key-value Store.
III. CAP theorem.
Lots of commercial and open source NoSQL are developed and
floated in the market by various vendors. Currently there are more
than 150 NoSQL databases.
The common motivations of NoSQL design are: