With group source processing, PowerExchange reads data from the same physical source in a single pass. This processing enhances throughput and reduces resource consumption by eliminating multiple reads of the source data.

PowerExchange and PWXPC use group source processing when possible in CDC sessions for all data sources and in bulk data movement sessions for nonrelational data sources.

For CDC data, PowerExchange uses group source processing to read changes for all tables defined in a mapping from the change stream in a single pass. For nonrelational bulk data, PowerExchange uses group source processing to read all records in a single multi-group source qualifier in a mapping.