To specify that a checkpoint data set resides on a
Coupling facility structure,
you must have taken the following steps when planning your JES2 configuration.
- Format a Coupling facility resource management (CFRM) couple data
set for use at your installation. See z/OS MVS Setting Up a Sysplex
for specific instructions on defining the coupling facility
resource management administrative policies. These policies each provide
a number of with structures that can contain checkpoint data
sets. Since JES2 supports system managed processes, you should also
review the Coupling facilitiestopic "System-Managed
Processes Considerations" in z/OS MVS Setting Up a Sysplex to enable system managed functions. We recommend that
structure full monitoring be suppressed by setting a FULLTHRESHOLD
value of 0 for the coupling facility structure where a checkpoint
is to reside.
- Ensure that you have allocated enough storage for the:
- Coupling facilityStructure
- JES2 checkpoint data set
(To determine these sizes, see Determining the size of your checkpoint data set.)
- Before starting the JES2 address space, specify the Coupling facility structure
where a checkpoint is to reside on the CKPTDEF initialization statement
as described in Checkpoint data set specifications and z/OS JES2 Initialization and Tuning Reference.