大数据之“大”在于它的海量,即在互联网时代产生的数据信息的一个海量汇集。互联网业界将大数据的特点归纳为4个“V”:Volume(大量)、Velocity(高速)、Variety(多样)、Veracity(精确)。这4个“V”足以在短时间内涌现出大量的数据。一组名为“互联网上的一天”的数据显示:24小时里,互联网产生的全部内容可以刻满1.68亿张DVD;发出的邮件有2940亿封之多,相当于美国两年的纸质 The Big Data of big data lies in its magnanimity, a massive collection of data and information generated in the Internet age. The Internet industry summarizes the characteristics of big data into four “V” s: Volume, Velocity, Variety, and Veracity. These four “V ” enough to emerge in a short time a large amount of data. A set of data, entitled “One Day on the Internet,” shows that over the course of 24 hours, the entire content produced by the Internet can be inscribed on 168 million DVDs; 294 billion letters are sent out, equivalent to two years of US paper quality