LOG FILE MANAGEMENT DEVICE, LOG FILE MANAGEMENT SYSTEM, LOG FILE MANAGEMENT METHOD, AND PROGRAM THEREOF

摘要

PPROBLEM TO BE SOLVED: To provide a log file management device which performs unitary management of a commit log file and determines an opportunity of deleting unnecessary commit log to delete them. PSOLUTION: The log file management device includes: a request accepting part 2 which accepts a request for update of record data from a client device 1; a commit log generation part 3 which generates a commit log; an update execution part 4 which perpetuates the commit log in a commit log storage part 8 and acquires record data at prescribed timing as check points from a record data storage part 6 per set of records to compare the points of time of perpetuation and indicates deletion of commit logs before the point of time when the check points are perpetuated oldest, as unnecessary commit logs; a check point acquisition part 6 which acquires and perpetuates check points to store them in a check point storage part 9; and a commit log control part 5 which deletes the unnecessary commit logs. PCOPYRIGHT: (C)2011,JPO&INPIT