Some data records exist in the form of analog or data, but are stored locally, are not public **** data resources, and are not open to Internet users, such as music, photos, videos, surveillance videos and other audio and video data. Not only is there a huge amount of data on the Internet, but it is being ****enjoyed by all Internet users in unprecedented quantities.

2. The Development Status of Mobile Internet

After the emergence of mobile Internet, the sensors of many mobile devices have collected a large amount of data on users' clicking behavior. iphone has three sensors and samsung has six. They generate a large amount of click data every day, which is owned by certain companies, and a large amount of user behavior data.

3, electronic maps

Electronic maps, such as gold, Baidu, Google maps, it generates a large amount of data flow data, data is different from traditional data, traditional data represents an attribute or a metric value, but the data flow map represents a behavior, a habit, streaming data frequency analysis will produce huge commercial value. Map-based data flow is a new type of data that did not exist in the past.

4, the development of social networks

Entering the era of social networks, the network behavior is mainly created by user participation, a large number of Internet users have created a large number of social behavior data, which is unprecedented. It reveals the characteristics of people's behavior and life habits.

5. E-commerce

The rise of e-commerce has generated a large amount of online transaction data, including payment data, query behavior, logistics and transportation, purchase preferences, click orders, evaluation behavior, etc., which is information flow and capital flow data.

6, search engine

The traditional portal to the search engine, the user's search behavior and questioning behavior collected a large amount of data. The decline in the price per unit of memory has also made it possible to store data.