On an MVS system, the ECCR captures change data from a data source and passes the captured changes to the PowerExchange Logger for recording.

PowerExchange provides an ECCR for each data source. The ECCR captures the changes to the source and passes the captured changes to the PowerExchange Logger for recording.

The mechanism that the ECCR uses to capture the changes depends on the data source. Some ECCRs capture changes synchronously as the changes are occurring. Other ECCRs capture changes asynchronously from database logs or CDC tables.

PowerExchange provides synchronous ECCRs for the following sources:

PowerExchange provides asynchronous ECCRs for the following sources:

With the exception of Datacom, the asynchronous ECCRs are log-based. Datacom is a table-based ECCR.