TRANSACTION PROCESSING SYSTEM

摘要

PURPOSE:To assure the fast recovery of a transaction processing system when the system working is stopped by a fault by using the unreplaced information on a transaction acquired in an area of a nonvolatile memory to recover the system in case the transaction under execution is not completed yet at the check point processing time. CONSTITUTION:The system working is stopped due to a fault after the time point T3 and the transactions C, E and F are kept uncompleted. Under such conditions, the information on the residence tables, etc., which are replaced by transactions C and E in the system recovery processing are recovered to their unreplaced states by means of the unreplaced information on said transactions C and E stored in a back-out file 40. Thus it is possible to recover the system when the working of the system is stopped by a fault without causing the increase of overhead at acquisition of the CD information despite the presence of a long transaction that requires the long processing time.