# Case Study Background Introduction (A)

+ Description of business scenario
  + The peak business period is: 19:30 ~ 22:30
  + Flink writes the computation results directly to the TiDB cluster
  + The front-end dashboard refreshes data every 1s ~ 5s


![left](./student-guide/diagram/27-blackground-01-01.png)

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Description of business scenario
  The peak business period is: 19:30 ~ 22:30
  Flink writes the computation results directly to the TiDB cluster
  The front-end dashboard refreshes data every 1s ~ 5s