MEMORY FILE BACKUP METHOD OF TRANSACTION PROCESSING SYSTEM

摘要

PURPOSE:To provide the memory backup system for preventing the on-line processing of a transaction processing system from being interrupted and for shortening memory file recovery processing time at the time of restoration. CONSTITUTION:A transaction processing part 100 updates a memory 200 by recording a history record in a transaction history 300 synchronously with the updating of the memory 200. When fixed time or a certain number of transactions are processed, a transaction history extracting part 410 extracts the history record from the transaction history 300. The extracted history record is updated into the same image as the memory 200, which is updated by the transaction processing part 100, in a backup file 500 on a nonvolatile storage medium by a backup file updating part 420. At the time of any system fault, the fault is recovered by utilizing the backup file 500 and the transaction history 300.