The IMS LOCK command is used to disable a terminal, stop the scheduling of a specific transaction, stop the scheduling of a specific program, or disable a database, making the IMS resource unavailable for processing. The UNLOCK command can be used to enable the IMS resource again, making it available for processing.
To prevent unauthorized users from disabling IMS resources and affecting IMS processing, security must be provided for the resources specified on the LOCK and UNLOCK commands. In releases of IMS prior to IMS r9.1, IMS provided a mechanism using the IMS Security Maintenance Utility (SMU) to control who was allowed to lock and unlock specific IMS resources.
In IMS r9.1 and above, CA Top Secret can be used to directly protect the resources specified on the LOCK and UNLOCK commands.
CA Top Secret security for resources on the LOCK and UNLOCK commands is controlled by the LOCKSEC= IMS initialization parameter.
Note: This section only pertains to IMS regions running IMS r9.1 and higher. CA Top Secret only provides security for resources specified on the LOCK and UNLOCK command in IMS regions running IMS r9.1 or higher.
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