When running Unity 17.00 with Teradata 17.00 or later, the CDM performance is improved with the CDM Streaming and CDM Multi-Stream functionalities.
With CDM Streaming, the source system sends the change data information to Unity as the AMP executes the query. Unity forwards that change data information to the target systems, which stores the data in a staging table. Once all the data is received on the target system, the change data is applied as a single bulk operation.
With CDM Multi-Stream, multiple connections are used to retrieve the change data from the source system and to apply the data to the target systems.