The Post-Log Merge option of the PowerExchange Logger allows you to capture changes using multiple PowerExchange Loggers on multiple z/OS systems and then extract the merged changes from a single Logger. With DB2 data sharing, the Post-Log Merge option of the PowerExchange Logger for z/OS is not required.
The DB2 ECCR uses DB2 IFI 306 calls that return change information from all members in the data sharing group.
Post-Log Merge is not required for DB2 data sharing. However, if Post-Log Merge is used for another reason, the DB2 ECCR can also attach to a member Logger of the Post-Log Merge group, even when running in data sharing mode. A single DB2 ECCR is all that is required, even when connecting to a PowerExchange Logger in a Post-Log Merge configuration.