On Mon, 18 Jul 2011 14:45:46 -0700, Sam Siegel wrote: > ... >I've yet to see an open system person have even a vague understanding >of record oriented I/O or PDS processing. > OS/360 and its progeny have only a vague understanding of record oriented I/O. Consider that QSAM is the record oriented access method, yet it won't let you NOTE the position of a record nor POINT to it. BSAM has NOTE and POINT, but those are in terms of blocks, not records. And PDSes are biased toward BPAM which, again, is block oriented, not record oriented. And many programming languages (Rexx, I know; C, AFAIK) support PDS processing only if the programmer allocates to the individual member; quite a vague understanding of PDS processing.
VSAM ESDS? How well has it penetrated? What utilities will let me use ESDS as SYSIN? VM/CMS does far better. It uses an Item Number which is a logical record. It even allows creating sparse files (at least for RECFM=F). -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
