z/OS: OPMODE restrictions by version

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 you 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 7.0.1

Table 1. Functions and capabilities in Version 7.0.1

Function	Reference
Log compression	Log compression
GROUP units of recovery	Unit of recovery disposition
Publish/subscribe migration using the CSQUMGMB utility	CSQUMGMB removed in IBM MQ 8.0

IBM WebSphere MQ 7.1

Table 2. Functions and capabilities in Version 7.1

Function	Reference
CFLEVEL(5) which is a prerequisite for Shared Message Data Sets (SMDS) and custom offload rules	DEFINE CFSTRUCT Planning your 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 8.0

Table 3. Functions and capabilities in Version 8.0

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 Planning how you 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)
Using host names, restricting the certificate issuer, and checking client credentials in CHLAUTH rules	SET CHLAUTH