Specifying Normal PDSE Sharing in a Multiple-System Environment

In a multiple-system environment, use PDSESHARING(NORMAL) to share PDSEs at the data set level. Specify PDSESHARING(NORMAL) in the IGDSMSxx member in the SYS1.PARMLIB.

To change the PDSE sharing option back to normal, follow these steps for each z/OS system in your sysplex that is running with extended sharing:

Change the IGDSMSxx member in SYS1.PARMLIB to contain PDSESHARING(NORMAL) or remove the PDSESHARING entry to allow the system to default to normal sharing.
Re-IPL the system.
Rule: To ensure that the sysplex does not continue with extended sharing, you must reset all systems at the same time.

Restriction: All systems that share a PDSE must operate in the same sharing mode (either NORMAL or EXTENDED). To prevent damage to the shared PDSE, the operating system negotiates the sharing rules when a system joins the sysplex. The joining system is not allowed to join the other systems that are in the PDSE sharing sysplex.

Related reading: For more information on using the PDSESHARING keyword, see the z/OS DFSMSdfp Storage Administration.