What are the characteristics of big data?

Big data technology refers to the ability to quickly obtain valuable information from various massive types of data. Technologies suitable for big data include MPP database, data mining power grid, distributed file system, distributed database, cloud computing platform, Internet, extensible storage system and so on.

Big data has the following four characteristics:

First, the amount of data is huge. For example, the data volume of all printed materials produced by human beings is only 200PB. Typical personal computer hard disk capacity is in the order of TB, while the data volume of some large enterprises is close to EB.

Second, the data types are diverse. Nowadays, data types are not only text, but also pictures, videos, audio, geographic information and other types of data, and personalized data accounts for an absolute majority.

Third, the processing speed is fast. Data processing follows the "1 second law", and high-value information can be quickly obtained from all kinds of data.

Fourth, the value density is low. Take video as an example. An hour of video, in the process of continuous testing, may only have one or two seconds of useful data.

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