Change capture for synchronous data sources must run on the z/OS system where the changes are made. Synchronous data sources include IMS, Batch VSAM, and CICS/VSAM.

Run the ECCR for a synchronous data source on each z/OS system in the sysplex where the changes are made. Also run a PowerExchange Agent on each system where the ECCR runs, and run a Post-Log Merge member Logger on one of the z/OS systems. The minimum capture environment on any one system includes a PowerExchange Agent, PowerExchange Logger, and an ECCR.

All log readers must run on the same z/OS system as the Post-Log Merge job. Log readers include the PowerExchange Listener, netport jobs, Condense jobs, and the DTLUAPPL utility.

For the DTLUAPPL utility and Condense jobs, ensure that the Post-Log Merge member Logger runs on the same system as the Post-Log Merge job.