Data processing system, data processing method, and data processing program

A data processing system, comprising:

• an execution unit which executes a plurality of applications in one process while referring to/updating a first database for storing data in a main storage device and a second database for storing data in an auxiliary storage device;
• a buffer storage unit which stores output data by the application executed by the execution unit in a buffer separately for each of the applications;
• an issuing unit which issues a processing end notice every time processing by the application ends;
• a first storage unit which stores, out of the output data stored in the buffer, the output data corresponding to the application for which the processing end notice is issued, in a first file which cannot be referred to from another process;
• a commitment request unit which requests the application for which the processing end notice is issued to commit the second database;
• a first commitment unit which updates a processing progress state stored in the second database separately for each of the applications, and commits the second database when commitment is requested;
• a second storage unit which stores the output data stored in the first file, in a second file which can be referred to from another process, when the commitment by the first commitment unit is completed for all the applications;
• and
• a second commitment unit which commits the first database when the output data in the first file is stored in the second file.