IBM IMS Program Restart Facility for z/OS, 2.2

The IMS Program Restart Facility for z/OS assists with the following actions:

• A batch job that requires a restart is restarted in accordance with proper restart procedures.
• Identifies and uses the correct log data set and the correct checkpoint ID.
• Automates the backout of abended DL/I batch jobs without the need to manually code and execute multiple IMS utility jobs.
• Automates IMS DL/I batch backout processing at the time an abend occurs (or when the job is restarted if backout cannot be done at abend time). The backout process releases database locks and makes database segments available to other tasks.

In a data sharing IMSplex environment, IMS Program Restart Facility for z/OS provides the additional feature of allowing a BMP to be restarted using a different IMS system. Taking advantage of this feature helps to provide improved restart times in the event of a system outage.

In addition, IMS Program Restart Facility for z/OS provides the ability to restart an IMS job on a different version of IMS than was in use when the job abended. This allows the implementation of an IMS version upgrade by simply abending running IMS jobs before the upgrade, and restarting the jobs after the upgrade is completed.

IMS Program Restart Facility for z/OS is easily implemented and typically requires no application changes. While an IMS batch job is running, IMS Program Restart Facility for z/OS intercepts and writes checkpoint records to two data sets. These data sets are deleted when the batch job completes successfully. In the event of an abend, however, the data sets remain in place and are used to restart the job.

IBM IMS Program Restart Facility for z/OS offers:

• New ISPF interface.
• Significant reduction of contention when options are updated.
• Support for restarting jobs across different versions of IMS.
• Capability to specify options that are based on job name, step name, and IMSID instead of only by job name.

All functions of IBM IMS Batch Backout Manager for z/OS (5697-H75) are now incorporated into IMS Program Restart Facility for z/OS, 2.2.

Program number: 5655-E14