SYSTEM FOR SYNCHRONIZATION BETWEEN DATA BASE AND NORMAL FILE

PURPOSE:To prevent a data base and a normal file from becoming asynchronous by returning even the pointer of the normal file to a last stationary point when program fault occurs and the data base is returned to a nearest stationary point. CONSTITUTION:A program supervising means 2 holds the number of inputs in an input quantity counting table 42 at every input transaction process; when the data base is updated and established by every input quantity, a processing quantity is set in a program control table 41 and the postprocessing process number is set in a transaction number control table 43. If the fault occurs and a program is started while the data base is returned to the nearest stationary point, the program supervising means 2 considers that normal processing is carried out up to the process quantity value in the control table 41 and instructs an operating system 1 so that an input corresponding to the process quantity and the transaction number of an output paired with it are read out of the number control table 43 and the pointers are set to those number values through a pointer returning means 3.