80 IMS in the Parallel Sysplex, Volume III: IMSplex Implementation and Operations
/TRACE SET ON TABLE CLST
/TRACE SET OFF TABLE OCMD
/TRACE SET OFF TABLE CLST
3.14 DBRC address spaces
All of the address spaces which invoke DBRC are eligible to participate in automatic RECON
loss notification function. To do this, they must join the IMSplex either by coding
IMSPLEX=plexname in their execution JCL, or by using exit DSPSCIX0. The exit is easier,
otherwise you have to change all the following jobs or procedures:
Online DBRC
FDBR
DBRC batch utilities (DSPURX00)
Batch jobs with DBRC=Y
Database utilities with DBRC=Y
The RECON header record includes an IMSPLEX name, so if a DBRC job tries to join the
plex using a set of RECONs for another IMSplex, it will not be able to access the RECONs.
3.15 IMSplex security
The way you establish resource security for the IMS online system does not change for an
IMS in an IMSplex. The resources that can be protected and the facilities available to protect
them are similar.
3.15.1 Security issues
The two types of security issues for a single IMS also exist for an IMS within an IMSplex. You
must address one or both types of security issues:
Securing the kind of resource to which a user has access
Securing what the user can do to the resource after the user has access to it
If commands are entered through OM API, we recommend that you perform all security
checking in OM. To authorize classic commands from OM, you must set the appropriate value
for the CMDSEC= parameter in DFSCGxxx.
If SCI registration security is desired, include IMS control region in RACF definitions.
3.16 Miscellaneous considerations when implementing CSL
There are few additional things you may want to be aware of when implementing the CSL:
All new address spaces default to ARM=Y. This is usually good.
There are many new and changed messages and abends (and some deleted ones too)
– See Chapter 6 of
IMS Version 8: Release Planning Guide,
GC27-1305
Log record format changes
– See Chapter 29 of
IMS Version 8: Release Planning Guide,
GC27-1305