Review of performance of various Big Databases

Relational databases have been the main model for information data storage, retrieval and administration.A relational database is a table-based data system where there is no scalability, insignificant information duplication, computationally costly table joins and trouble in managing complex information. The greatest inspiration of NoSQL is adaptability. NoSQL information stores are broadly used to store and recover potentially a lot of information.In this paper, we assess four most famous NoSQL databases: Cassandra, MongoDB, and CouchDB