The elasticity of storage and server resources is at the crux of BASE paradigm. BASE databases use strategies to have Consistency, Atomicity and Partition tolerance ‘‘eventually’’. BASE does not flout CAP theorem, but works around it. If users are partitioned across five database servers, BASE design encourages crafting operations in such a way that a user database failure impacts only the 20% of the users on that particular host. The following subsections discuss about the BASE properties of some of the mostly used NoSQL.