Recovery considerations for multiple systems

Each system in the multisystem configuration uses the full recovery capabilities of IMS. These capabilities assure that messages are not lost or duplicated within the single system.

You will not lose messages under the following conditions:

• You do not cold start the subsystem or emergency restart (BUILDQ) if using an earlier checkpoint.
• No log records are lost.

VTAM® provides message integrity for SDLC links in addition to the MSC control functions.