<[email protected]> wrote: >> For those of us who are interested, could you give us some typical >> limits / structures of the incoming key values? The whole application >> has obviously piqued some interest (Don: another Assembler program >> hallenge?).
The application is an exit to CA IDMS. An IDMS exit should not issue operating system calls (e.g. I/O, SVCs, etc.) because anything that could cause a wait would cause the whole IDMS system to wait. The data coming in are database keys and the application needs to know, in a particular run-unit, which keys are being seen for the first time and which are new. New keys will get further processing. Because this is a database exit, efficiency is very important. An IDMS database is divided in areas and database keys within a particular area will fall within a defined numeric range. By adding up the range for all included areas (plus some other factors) the maximum number of space needed for the bit string can be determined. Because of these factors, and the ideas brought out in this discussion, the bit string idea seems like an excellent fit.
