大数据包含了互联网、医疗设备、视频监控、移动设备、智能设备、非传统IT设备等渠道产生的海量结构化或非结构化数据。大数据的特点不仅是数量大,同时还具有处理速度快、结构复杂和信息含金量低的特点。据IDC的统计,2011年全球所产生的数据总量是1.8ZB(1ZB=1 024EB,1EB=1 024PB,1PB=1 024TB,1TB=1 024GB),并且还以每年50%的速度增长。可以说,我们现在已经进入了大数据时代。大数据技术是继云计算、物联网之后IT产业又 Big data includes massive structured or unstructured data generated through channels such as the Internet, medical devices, video surveillance, mobile devices, smart devices, and non-traditional IT equipment. The characteristics of big data are not only large in quantity, but also have the characteristics of fast processing, complex structure and low content of information. According to IDC’s statistics, the total amount of data generated worldwide in 2011 was 1.8ZB (1ZB = 1024EB, 1EB = 1024PB, 1PB = 1024TB, 1TB = 1024GB) and also increased at a rate of 50% per annum. It can be said that we have now entered the big data era. Big data technology is following the cloud computing, IT industry after the Internet of things