Big data (big data), the IT industry terminology, refers to can't within a certain time with conventional software tools to capture, management and processing of data collection, the need to deal with the new model can more decision-making, insight found mass force and the process optimization ability, high rate of growth and diversification of information assets,

In viktor meyer - schon berg and Kenneth cook written "big data era" [2] cuhk data refers to need not random analysis method (sample) such shortcuts, and all data is adopted to improve the analysis, the 5 v characteristics of big data (IBM) : Volume (a lot), Velocity (high speed), segments (various), Value (low density) Value, Veracity (authenticity),