With the development of various portable devices, Internet of Things and cloud computing, cloud storage and other technologies, data content and data formats are diversified, and data granularity is becoming more and more fine, followed by the emergence of distributed storage, distributed computing, stream processing and other big data technologies, various industries based on a variety of even cross-industry data sources are related to each other to explore more application scenarios, while paying more attention to individual-oriented decision-making and application timeliness. Therefore, the data form, processing technology and application form of big data constitute a big data application that is different from traditional data applications.

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