Travel code is the code of communication big data travel card, which is also equivalent to health code. China Institute of Information and Communication, together with China Telecom, China Mobile and China Unicom, used mobile phones to receive data, which was obtained through the location of the base station where the users' mobile phones were located, providing free inquiry service for the 654.38+06 billion mobile phone users nationwide. Mobile phone users can query all the city information they have been to before 654.38+04 days through this service.
In fact, health codes need to be compared and monitored with dynamic data. The realization of health code depends on the operation and calculation of rule engine. To support the large-scale real-time dynamic query of billions of users, it is inseparable from the support of big data technology. From the storage point of view, the massive storage function of big data technology, close to PB-level data storage and expansion ability, can support the data storage of billion-level users of health code; From a computing point of view, the most important things here are ETL and streaming technology. Whether it is the memory computing of Spark architecture or the streaming processing mode of Flink, the computing power of thousands of servers is indispensable behind it, so the powerful computing power of Alibaba Cloud or Tencent Cloud plays a fundamental supporting role behind it.