13.3. Parallelizing processing (single machine)

Based on the previous section, multithreading is far from good enough. We can now see that the key to scaling is to find a suitable technique to parallelize batch processing.

Spring Batch provides a convenient way to organize steps for parallel execution. Spring Batch XML supports this feature directly at the configuration level. The feature also relates to the job flow feature. We focus here on the capability of a job flow to split step processing. This aspect is useful for scaling batch jobs because it allows executing several steps in parallel, as illustrated in figure 13.8 where Spring Batch executes dedicated steps in parallel to process products, books, and mobile phones.