Anne & Lynn Wheeler wrote: <begin extract> It wasn't [until, jg] well into the MVS release cycle ... that it dawned on them that they were selecting non-changed, shared, high-use linkpack pages for replacement before selecting lower use, application private data pages . . . </end extract>
and it I think can be agreed out of hand that this was not smart. Avoiding the operation of rewriting an unaltered page, however selected, to the page data set is nevertheless highly desirable. Page selection and selective page rewriting operations are, or at least should be, entirely separable operations. Moreover gather-write channel programs are in my experience 1) as efficient as connected-block ones and 2) not notably more difficult to write and test. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
