Recovering data in data sharing

The procedures for data recovery are fundamentally the same for data sharing as for non-data-sharing environments. Data sharing involves one catalog, but many logs and BSDSs. In addition to disk and cache controllers, the coupling facility adds a possible point of failure and requires appropriate procedures for data recovery.

In planning for data sharing, consider having more than one coupling facility. If an SCA or lock structure failure occurs, recovery for that structure can proceed automatically if a second coupling facility is available. For more information and detailed recommendations, see Planning for coupling facility availability for data sharing.