The following restrictions apply to the use of the Log Reader Capture Agent:
- IMS system log data sets (SLDS) must be cataloged
- IMS online log data sets (OLDS) must be preformatted which can be done using JCL similar to sample member FMTOLDS.
The IMS Installation manual from IBM describes several methods that may be used to ensure that the IMS online log data sets (OLDS) are formatted.
Note: The capture task must be stopped and restarted when the OLDS are changed. The Capture task can tolerate a cold start, but not a concurrent switch to a new OLDS. The Capture task is external to IMS and does not know about the new OLDS after the switch. It is solely dependent on the RECON for information about the OLDS.