Chapter 22. IMS Logging

IMS logging is the principal tool for recording online system activity. Data stored in various logging data sets is critical information that is used for restart, recovery, statistics, and audit purposes.

Logs are lists of activities, work that has been done, and changes that have been made. If you know the state of the system when activities were successful and what the system has done since then, you will be able to recover the system if a failure occurs.

In This Chapter

• Overview of IMS System Logging

• Database Recovery Control Facility

• IMS System Checkpoints

• IMS Log Data Sets

Overview of IMS System Logging

Logs make recovery and restart possible. As IMS operates, it constantly writes event information in log ...

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