What I remember of it is that he was convinced it was a lot slower. So I told him that nobody forced him not to use QSAM for datasets just because it ran in USS. And it think that is a great asset of it. Just because Unix forces you to have a hierarchical directory system does not mean, in USS, that you need to use it for all I/O.
René. > On 2 Jun 2023, at 17:03, Seymour J Metz <[email protected]> wrote: > > Dubbing is part of the setup overhead for a task, and only occurs once, so > except for very short tasks it is just noise in measuring performance. > > As for the general overhead of Unix System Services, the Devil is in the > details. For a comparison to be reasonable, the two programs have to be using > the services in a comparable fashion. Was your COBOL programmer really > comparing the overhead of conventional access methods to Unix file I/O, or > were the numbers drowned out by, e.g., differences in application logic? > > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
