Abstract: A service logic layer module receives an application message forwarded by a network device, classifies and identifies an application type of the application message, and determines a first processing operation to be performed to the application message based on an identification result. The service logic layer module receives a processing result returned from a data processing layer module, and determines a second processing operation based on the processing result. When the processing operation is an I/O processing operation for a single task, the data processing layer module controls I/O concurrency processing of the single task and returns a final processing result to the service logic layer module. When the processing operation is a data searching operation, the data processing layer module performs the data searching operation to obtain a final searching result, and returns the final searching result to the service logic layer module.