DATA MATCHING TIME SHORTENING METHOD

PURPOSE: To allow the master system, which acquires new data, to complete the matching processing to held data of the slave system as quickly as possible and to hold the data in the slave system during interruption with respect to the data matching time shortening method for the dual information processing system. CONSTITUTION: Each information processor 100 is provided with an added/ deleted record information table 130, and each storage part 120 is provided with a new data storage area 121 and an update area 122, and each information processor holds data in the update area 122. When a processing part 110 of one information processor newly acquires data, this data is compared with data held in the update area with a record as a unit after acquired data is temporarily stored in the new data storage area, and only added or deleted records are extracted to constitute the added/deleted record information table, and held data is updated by added/deleted data and is transferred to the other information processor to update the data held in the processing part of the other information processor.