Data processing method and device and computer-readable storage medium

A data processing method for a data node, comprising:

• receiving a data acquisition request transmitted by a processing node;
• performing a preprocessing operation on source data according to the data acquisition request, to generate target data;
• recording operation information of the preprocessing operation through an operation ledger;
• and
• returning the target data and the operation ledger to the processing node, to cause the processing node to audit the target data by using the operation ledger in an audit, to determine whether the preprocessing operation recorded in the operation ledger is a valid operation, and add the target data to an aggregated data set when the target data passes the audit, the aggregated data set comprising a plurality of pieces of data that pass the audit, the plurality of pieces of data that pass the audit being provided to a business node, so that the business node provides a business service to a user.

A data processing system, comprising at least a processing node and a data node, wherein the processing node comprises:

• a request transmit unit, configured to transmit a data acquisition request to the data node, to cause the data node performing a preprocessing operation on source data according to the data acquisition request, generating target data, and recording operation information of the preprocessing operation in an operation ledger;
• a ledger receiving unit, configured to receive the target data and the operation ledger returned by the data node;
• an audit unit, configured to audit the target data by using the operation ledger in an audit, to determine whether the preprocessing operation recorded in the operation ledger is a valid operation;
• and
• a processing unit, configured to add the target data to an aggregated data set when the target data passes the audit, the aggregated data set comprising a plurality of pieces of data that pass the audit, the plurality of pieces of data that pass the audit being provided to a business node, so that the business node provides a business service to a user.