Author(s): Seema Rawat,Shankar Ramamoorthy

The Big Data is the new technology in the field of research in recent years and is not only big in Amount , but also produced at speed and variety, which endeavors the research upsurge in multidisciplinary fields like Decision making , Healthcare industry and business analysis. Due to the basic features (Volume, speed, Velocity, and Variety) of Data when it is difficult to store and analyse with existing tools and techniques. It explains distinctive tasks in scalability, storage, computational complexity, analytical, security issues. Hence here the salient features of big data and how this shakes the storage tools and processing technique. It shows the taxonomy of Big Data application areas and explanation of data characteristics, privacy and security issues. Furthermore, It also discover research issues and challenges in big data storage, privacy and security of data and data processing.