Coupling facility shutdown considerations

Important: It is important to properly remove all structures from a coupling facility that will be permanently taken out of the sysplex before shutting down the coupling facility. Failure to remove all structures might result in a pending condition (or transitioning structure) when attempting to allocate structures in a new coupling facility. Reactivation of the old coupling facility might be required to resolve the condition.

A running coupling facility LP can contain structures and data important to a sysplex. Make sure that you take proper precautions to preserve these structures and data before a power off, power-on reset (POR), LP deactivation, or shutdown (using the coupling facility control code SHUTDOWN command) of the coupling facility LP. Coupling facility structures and data will not survive any of these actions.

It is recommended to use the coupling facility SHUTDOWN command to shut down a CF image, because it performs a check to make sure that there are no allocated structure instances in the CF before proceeding to shut down the coupling facility.

For more information about removing, replacing, or shutting down a coupling facility, see z/OS® MVS Setting Up a Sysplex, SA22-7625.