OPMODE restrictions by version on z/OS
The availability of some new functions and backward migration for IBM MQ for z/OS® is controlled by the OPMODE parameter in the CSQ6SYSP macro. The OPMODE parameter determines whether we can use selected new functions, before you commit to staying at a given release. The functions and capabilities that are restricted in the different versions of the product are listed here.
IBM WebSphere MQ Version 7.1 on z/OS
| Function | Reference |
|---|---|
| CFLEVEL(5) which is a prerequisite for Shared Message Data Sets (SMDS) and custom offload rules |
DEFINE CFSTRUCT Plan the coupling facility and offload storage environment Where are shared queue messages held? |
| Support for the X'3C' OTMA protocol messages, which report IMS health status | The IMS bridge |
| Resilience to coupling facility connectivity failures | Shared queue recovery |
IBM MQ Version 8.0 on z/OS
| Function | Reference |
|---|---|
| Buffer pools can be located above the bar | DEFINE BUFFPOOL |
| Multiple cluster transmission queues | Clustering: Planning how to configure cluster transmission queues Working with cluster transmission queues and cluster-sender channels Plan how we use multiple cluster transmission queues |
| Increased maximum addressable log range | Larger log Relative Byte Address |
| Configurable certificates for individual channels using CERTLABL | Certificate label (CERTLABL) |
| Use host names, restricting the certificate issuer, and checking client credentials in CHLAUTH rules | SET CHLAUTH |
Note: These functions are also restricted by OPMODE in IBM MQ Version 9.0