Hi, 

      With the sync module test completed, this feature will be online soon, so 
I think it is necessary to describe the scene of using the sync function here. 
      
      In the case of a factory application, there are usually multiple 
sub-factories and multiple general(main) factories. Each sub-factory uses an 
IoTDB instance to collect data, and then synchronize the data to the general 
factory for backup or analysis. A general factory can receive data from 
multiple sub-factories and a sub-factory can also synchronize data to multiple 
general factories. In this scenario, each IoTDB instance manages different 
devices. 
      
      In the sync module, each sub-factory is a sender, a general factory is a 
receiver, and senders periodically synchronizes the data to receivers. In the 
above application scenario, the data of one device can only be collected by one 
sender, so there is no device overlap between the data synchronized by multiple 
senders. Otherwise, the application scenario of the sync module is not 
satisfied.

      If you have any idea of the sync application scenario, welcome to discuss 
it here.


Best Regards,
—————————————————
Tianan Li
School of Software, Tsinghua University

李天安
清华大学 软件学院

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