A large-scale data processing system and method including a plurality of processes, wherein a master process assigns input data blocks to respective map processes and partitions of intermediate data are assigned to respective reduce processes. The passage includes an upstream part having a polygonal cross sectional area and a downstream part having a cross sectional area smaller than the polygonal cross sectional area. Control data are added to the document data in the processing computer with a processing module via which print stock generated from the document data are separately processed segment-by-segment. Thus, permissions on a read-only filesystem may be kept from being altered.