Use the Automatic Restart Manager (ARM) to restart the
Gateway daemon if a failure occurs.
If you start the CICS Transaction Gateway with JCL
(see Starting in batch mode), you can register
the job with z/OS ARM.
This allows z/OS to restart the Gateway automatically if it fails,
or if the system on which it was running fails.
Automatic restart management is a sysplex-wide integrated
automatic restart mechanism that:
- restarts a subsystem in place if an abend occurs (or if a monitor
program notifies ARM of a stall condition)
- restarts CICS data
sharing servers in the event of a server failure
- restarts a failed z/OS image
The main benefits of ARM are that it:
- Eliminates the need for operator-initiated restarts, or restarts
by other automatic packages, thereby:
- Improving emergency restart times
- Reducing errors
- Reducing complexity
- Provides cross-system restart capability. It ensures that the
workload is restarted on z/OS images with spare capacity, by working
with the z/OS workload manager.
- Allows all elements within a restart group to be restarted in
parallel. Restart levels (using the ARM WAITPRED protocol) ensure
the correct starting sequence of dependent or related subsystems.
For more information about Automatic Restart Management, see the
relevant version of the publication z/OS MVS Setting up a Sysplex,
SA22–7625.
See the SCTGSAMP PDS library for sample JCL. The job steps relating
to CTGARM are commented-out, so that users who do not use ARM can
run the samples.