OVERVIEW

KSAM files can be used efficiently without any knowledge of how the files are structured or how file blocking and size is determined. The default values provided for file capacity, key blocking, number of key entries, and so forth are effective in many applications. This appendix provides the sophisticated programming staff with information on how KSAM files are structured, how disc space is allocated to a KSAM file, and how memory space is allocated for the Extra Data Segments used when a KSAM file is modified or accessed. Such information may be useful for improving performance based on the particular application.