Big Data has been one of the current and future research frontiers. In this year, Gartner listed the ‘‘Top 10 Strategic Technology Trends For 2013’’ [158] and ‘‘Top 10 Critical Tech Trends For The Next Five Years’’ [157], and Big Data is listed in the both two. It is right to say that Big Data will revolutionize many fields, including business, the scientific research, public
administration, and so on. For the definition of the Big Data, there are various different explanations from 3Vs to 4Vs. Doug Laney used volume, velocity and variety, known as 3Vs