Big Data is formed by extremely large and complex data sets, that the traditional data processing software is unable to capture, store or analyze. The term "Big Data" is most commonly associated with the 3Vs, first introduced by Doug Laney, the VP and distinguished analyst of Gartner in year 2001. The 3Vs are Volume, Velocity and Variety, used to define properties or dimension of the big data. From then on, more ''V'' has been identified including Veracity, Validity, Value, Visibility among the others, while so far the importance of Veracity has been gradually acknowledged.

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