ABCs of z/OS System Programming Volume 3 - IBM Redbooks

7.35 Interacting with DFSMStvs
Interacting with DFSMStvs includes
Use of SETSMS commands to change the
IGDSMSxx specifications
Use of SET SMS=xx command to activate a new
IGDSMSxx member
Use of VARY SMS commands
Use of display commands to get information about
the current DFSMStvs configuration
IDCAMS command SHCDS
Figure 7-47 Operator commands to interact with DFSMStvs
Interacting with DFSMStvs
This section provides a brief overview of several commands that were introduced particularly
for displaying and changing DFSMStvs-related information. You can use those commands in
addition to the commands we already described in 7.20, “Interacting with VSAM RLS” on
page 412.
SETSMS command
Use the SETSMS command to overwrite the PARMLIB specifications for IGDSMSxx. The syntax
is:
SETSMS AKP(nnn|1000)
QTIMEOUT(nnn|300)
MAXLOCKS(max|0,incr|0)
These are the only DFSMStvs PARMLIB specifications you can overwrite using the SETSMS
command. For information about these parameters, see 7.33, “Update PARMLIB with
DFSMStvs parameters” on page 436.
SET SMS=xx command
The command SET SMS=xx causes the IGDSMSxx member of SYS1.PARMLIB to be read. It
allows you to activate another IGDSMSxx member, where xx specifies the last two digits of
the member. You can change DFSMStvs parameters in IGDSMSxx that you cannot change
with the SETSMS command, and activate the changes afterwards by running SET SMS=xx.
Chapter 7. DFSMS Transactional VSAM Services 439