A Critical Overview of NoSQL Databases

With the growth of Digital world, complexity in terms of volume, variety and velocity is being observed directly referring to 'Big Data'. This is depicts the data collection which cannot be effectively managed using classical relational model like RDBMS because of its large growing size. To overcome such problem of handling , processing and managing large databases, NoSQL databases play a vital role in today's world and modern organizations. There are various types of NoSQL databases available which can be opted on specific requirements like scalability , application type etc. This paper is intended to make the users familiarize with three mostly used NoSQL databases : Cassandra, MongoDB and Couchbase and their comparisons on certain attributes like scalability, Performance and Reliability etc.