This topic is intended for system programmers or people that are
diagnosing system problems.
DFSMSdfp provides two address spaces for processing PDSEs: SMSPDSE
and SMSPDSE1. A z/OS system can have only the SMSPDSE address space,
or both the SMSPDSE and SMSPDSE1 address spaces. Some control blocks
that are associated with reading, writing, and loading PDSE members
are still located in the extended common service area (ECSA).
- A non-restartable address space for PDSE data sets
that are in the LNKLST concatenation. (The linklist and other system
functions use global connections.) The SMSPDSE address space cannot
be restarted because global connections cannot handle the interruption
and reconnection that are part of an address space restart operation.
SMSPDSE is the only PDSE address space for the z/OS system when one
of the following conditions exists:
- The IGDSMSxx initialization parameter, PDSESHARING, is
set to NORMAL.
- The IGDSMSxx initialization parameters in a sysplex coupled
systems environment are set as follows:
- A restartable address space that provides
connections to and processes requests for those PDSEs that are not
part of the LNKLST concatenation. To create the SMSPDSE1 address space
during IPL in a sysplex coupled systems environment, set the IGDSMSxx initialization
parameters as follows: