Volume (Data in rest).

The benefit gained from the ability to process large amounts of information is the main attraction of big data analytics. Having more data beats having better models. The consequence is that it is a trend for many companies to store vast amount of various sorts of data : social networks data, health care data, financial data, biochemistry and genetic data, astronomical data, etc.

The Big word in Big data itself defines the volume. At present the data existing is in petabytes and is supposed to increase to zettabytes in nearby future. The social networking sites existing are themselves producing data in order of terabytes everyday and this amount of data is definitely difficult to be handled using the existing traditional systems.