Abstract

A common file system for a plurality of data processors according to the present invention includes a plurality of data processors, update history files capable of distributing and outputting history files to the data processors, a close and recovery controller for activating close processing of a block which is update-locked by a transaction task being processed in an abnormally-stopped data processor and recovery processing in units of update history files, and a close executer, activated by the close and recovery controller, for closing the block which is update-locked, thereby sending back an access request for the closed block to other operating data processors. The system further includes an individual file recovery executer for recovering contents of the closed block to a state before updating in accordance with the assigned update history file, and an individual close release executer for releasing closing of the block recovered by the individual file recovery executer, thereby enabling access from other operating data processors to the block which is released from closing.