DATA PROCESSING METHOD AND RELEVANT DEVICES AND SYSTEMS

Embodiments of the present invention disclose a data processing method and a related device, and a system. The method includes: a client generates a data digest for a stored data set and sends the data digest to a server; the server determines feedback information for the client according to the data digest and sends the feedback information to the client; when the feedback information received by the client includes a target data selection policy and a target policy parameter, the client may determine a data subset from the data set according to the target data selection policy and the target policy parameter and send the data subset to the server; and the server may establish a prediction model or update an existing prediction model according to the data subset. By implementing the embodiments of the present invention, an amount of data transmitted by the client to the server can be controlled. Therefore, resource consumption in a data processing process is effectively reduced, and in addition, representative data can be accurately and conveniently selected, so as to obtain a more accurate prediction model.