Virtual database space system and computer-readable recording medium recorded with database program

摘要

A virtual database space system realizable with a database program makes it possible to obtain a maximum throughput of database manipulations even when different types of transaction are mixed; can be started normally after a failure and thus eliminates the necessity for the user to be aware of the concept of recovery and as seen by the user has a very large logically nonvolatile virtual database space; and makes it possible for updates of the database to be accepted during the copying of a backup.