Using CA Tape Encryption in Your z/OS Environment › Maintain Database Storage

Maintain Database Storage

The BES database is used to store the following:

• Cryptographic key management information.
• Cryptographic keys (optional).
• Encryption and decryption statistics for every subsystem sharing a database. This includes detailed information about the last 1000 files that were either encrypted or decrypted by each subsystem.

Each subsystem that shares the database allocates a 1MB area of database storage to maintain cryptographic statistics. These 1MB areas are not automatically freed. Any subsystems which shared the database in the past continue to take up database space.

Use the DISPLAY DATABASE,SUBSYS command to display information about the BES database. The command displays information about the following:

• Subsystems sharing the database.
• Subsystems that have shared the database.
• Remote subsystems with keys mirrored via the CA Encryption Key Manager Networked Key Management Option.

Use the RESET DATABASE,SUBSYS command to reset a database storage area allocated by a subsystem which shared the database in the past but is not expected to share the database in the future. This command resets specific 1MB subsystem areas and returns the areas to the available pool of database space. No keys are removed from the database as a result of this command.

Note: For information on the DISPLAY DATABASE,SUBSYS and RESET DATABASE,SUBSYS commands, see the Configuration Guide.