1. Big data refers to a collection of data that cannot be captured, managed, and processed within a certain timeframe using conventional software tools, and is a massive, high-growth, and diversified information asset that requires a new processing model to have stronger decision-making, insight discovery, and process optimization capabilities.

2, in the Victor Mayer Sch?nberg and Kenneth Kukier written in the "era of big data," big data refers to not using random analysis (sampling) such a shortcut, but the use of all the data to analyze and process. The 5V characteristics of Big Data (proposed by IBM): Volume, Velocity, Variety, Value, Veracity

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