PowerExchange captures changes made to registered VSAM data sets when the batch job is configured to run the batch VSAM ECCR. The batch VSAM ECCR captures changes from GET, PUT, and ERASE requests for registered VSAM data sets.

The batch VSAM ECCR runs in the same address spaces as the batch job that makes changes to VSAM data sets. It captures changes as they occur using a VSAM JRNAD exit and passes the changes to the PowerExchange Logger for z/OS for logging. After the batch program opens the VSAM data set, PowerExchange records a single unit of work (UOW) in the PowerExchange Logger for all changes that the batch program makes to that VSAM data set. PowerExchange commits the UOW that contains the changes for the VSAM data set when the batch program closes the VSAM data set.