Batch Streaming refers to the application support for the concurrent execution of multiple instances of batch processes. Each logical batch process in the application (for example, GenerateInstructionLineItems) is represented by two physical batch executables. The first, the 'Chunker', divides the record set to be processed into a number of subsets or 'chunks', based on a 'chunk size' parameter set via system properties. The second, the 'Stream', processes these chunks. The Stream processes each record in a chunk, commits the result, and then looks for another chunk to process. Multiple instances of the Stream can execute in parallel.
By utilizing this Batch Streaming mechanism, Cúram batch processes can employ all of the available processing power of their host machine(s). Ultimately, this allows for the processing of more records in a given time period than a single instance of a batch process would allow.
Chapter 2 discusses the architecture of this mechanism.