Understanding CICS VR automatic deregistration

During the execution of various CICS® VR utilities, log of logs scan, backup notification, change accumulation, and so on. CICS VR stores information in the RCDS.

The information that CICS VR stores in the RCDS is necessary for proper recovery job creation. However, CICS VR only needs to store information in the RCDS that coincides with the time intervals that you wish to be able to recover VSAM spheres from update activity. For example, if your requirements specify that you need to be able to recover VSAM spheres from updates made only during the last five days, certain information that was stored in the RCDS six or more days ago is no longer required.

If outdated information is never removed from the RCDS, the RCDS eventually reaches its maximum size and becomes full. Once the RCDS becomes full, you would either have to manually deregister information from the RCDS or allocate a larger RCDS.

To help you avoid a situation where the RCDS becomes full, CICS VR offers the automatic deregistration function. This function periodically removes outdated information from the RCDS based on retention criteria that you set. Optionally, CICS VR also can delete and uncatalog certain entities when they are deregistered from the RCDS.

The following sections further explain how to use CICS VR automatic deregistration.


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Timestamp icon Last updated: Friday, 29 November 2013


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