big data is a collection of data that cannot be captured, managed, and processed with conventional software tools within an affordable time frame。

    McKinsey Global InstituteThe definition is:A data set with a large scale that greatly exceeds the capability range of traditional database software tools in terms of acquisition, storage, management and analysis, and has four characteristics: massive data scale, rapid data flow, diverse data types and low value density。

1. 意义

Today's society is a rapid development of society, science and technology developed, information flow, communication between people more and more close, life is more and more convenient, big data is the product of this high-tech era。The value of big data is reflected in the following aspects:

(1) Enterprises that provide products or services to a large number of consumers can use big data for precision marketing;

(2) Medium-sized and long-tail enterprises with small and beautiful models can use big data to transform services;

(3) Traditional enterprises that must transform under the pressure of the Internet need to keep pace with The Times and make full use of the value of big data。

2.结构

Big data is just a manifestation or feature of the development of the Internet to the present stage，There is no need to mythologize it or be in awe of it，Under the backdrop of technological innovation represented by cloud computing，This data, which is difficult to collect and use, is becoming easier to exploit，Through continuous innovation in all walks of life，Big data will gradually create more value for mankind。

Secondly, in order to understand big data systematically, it is necessary to decompose it comprehensively and carefully. I began to expand it from three levels:

The first level is theory, which is the only way of cognition and the baseline that is widely recognized and disseminated。Here, from the definition of big data characteristics to understand the industry's overall description and qualitative of big data;From the discussion of the value of big data, this paper analyzes the preciousness of big data.Insight into big data trends;Examine the long-standing game between people and data from the special and important perspective of big data privacy。

The second level is technology, which is the means to embody the value of big data and the cornerstone of progress。In this paper, the development of cloud computing, distributed processing technology, storage technology and perception technology is explained to illustrate the whole process of big data from collection, processing and storage to the formation of results。

The third level is practice, which is the ultimate value of big data。Here, from the four aspects of big data of the Internet, big data of the government, big data of enterprises and big data of individuals, it describes the beautiful scene that big data has shown and the blueprint that will be realized soon。