“BIG DATA IS DATA THAT EXCEEDS THE PROCESSING CAPACITY OF CONVENTIONAL DATABASE SYSTEMS.”
Big data is data that exceeds the processing capacity of conventional database systems. The data is too big, moves too fast, or doesn’t fit the strictures of your database architectures. To gain value from this data, you must choose an alternative way to process it.
Edd Dumbill. Big Data. March 2013, 1(1): 1-2. doi:10.1089/big.2012.1503.