HISTORY STORAGE DEVICE, IMAGE FORMING APPARATUS AND NON-TRANSITORY COMPUTER READABLE MEDIUM STORING PROGRAM

摘要

A history storage device includes: a storage unit that, in storing first history information including phenomenon information corresponding to a phenomenon having occurred and accompanying information accompanying the phenomenon information in a storage region, when the phenomenon information included in the first history information is duplication of phenomenon information included in second history information having already been stored in the storage region, deletes the phenomenon information included in the first history information and stores, in the storage region, the accompanying information which is included in the first history information and is associated with the phenomenon information; and a reconstruction unit that, in reading out the first history information from the storage region, based on the phenomenon information with which the accompanying information included in the first history information is associated, reconstructs the deleted phenomenon information, to thereby reconstruct the first history information including the phenomenon information and the accompanying information.

主权项

1. A history storage device comprising:
a generating unit that generates history information including event information corresponding to an event having occurred and accompanying information accompanying the event information; a storage unit that, in storing first history information in a storage region, when event information included in the first history information is the event information included in second history information having already been stored in the storage region, does not store the event information included in the first history information and stores the accompanying information included in the first history information in a region corresponding to the event information included in the first history information within the storage region; and a reconstruction unit that, in reading out the first history information from the storage region, based on the region in which the accompanying information included in the first history information has been stored, associates the event information with the accompanying information included in the first history information to reconstruct the first history information.