About this task
This is part of the larger task of customizing your z/OS® environment.
IBM® Integration Bus for z/OS uses Resource Recovery Service
(RRS) to coordinate changes to WebSphere® MQ and DB2® resources. Ensure that it is
configured and active on your system, otherwise your integration node
will be unable to connect to DB2.
Each integration server address
space on z/OS that is configured
for CICS® two-phase commit (globally-coordinated)
transactions will register as a resource manager with RRS. The following
planning considerations apply to each integration server address space
that is configured for CICS two-phase
commit:
- The address space automatically becomes non-swappable to ensure
that the RRS exits that are registered with RRS are available at all
times.
- The address space uses a single reusable System LX. There is a
limited number of System LXs available on the z/OS system, and you must ensure that sufficient
are made available. The parameter NSYSLX in IEASYSxx determines
the number of System LXs that are available. See the z/OS MVS™ Initialization
and Tuning Reference guide for further information. System
LXs can be monitored in the IBM Health
Checker by reviewing the value of IEA_LXS. For
more information, see the IBM Health
Checker for z/OS User's Guide.
Refer to the following documentation for detailed information
about RRS: z/OS V1R5.0 MVS Setting Up a Sysplex and z/OS V1R5.0 MVS Programming: Resource Recovery SA22-7616.