The control file is created and maintained by the program SYSTEM/DMCONTROL. The control file is used for database interlock control, compatibility checking between software and data, compatibility checking among all files of the database, and for storing audit control information and dynamic database parameters. The control file is updated by all system software which uses the database. The name of the control file is as follows:

<database name>/CONTROL

If it is a permanent directory database, the control file is created under the permanent directory, and its name is as follows:

<DBPATH specification>/<database name>/CONTROL