Recovering JES3 Checkpoint Data Sets

The JES3 checkpoint data set or sets, which are allocated using the JES3 cataloged procedure, provide the information needed for a warm start or hot start of JES3 with minimum or no loss of system information.

JES3 writes job-related information to the JES3 checkpoint data set when the information changes in the system. The JES3 checkpoint data set contains the information required to initialize JES3 on either a global or local processor. During a warm or hot start, JES3 restores this information to the system.