No, I have no business case. I was speaking philosophically. It is the same advice I would give an associate who was thinking of developing an operating system. It's not an excuse for anything. I make extensive use of PDSE where I find them appropriate.
And it's just my opinion. You can debate whether an STC constitutes "internal OS code" and you can certainly debate my assertion that use by COBOL implies that it "should" be internal. (COBOL requires LE and LE is certainly not built into the MVS kernel.) WRT the use of PDSE for SYS1.NUCLEUS and so forth, I admit to being ignorant of the details of the IPL process and of the internal "guts" of PDSE, but I would think building read-only, internal-use-only PDSE support into NIP or whatever would not be an unreasonable task. In any event, it still seems to me that after 26 years or whatever that IBM should have solved the PDSE problems, which obviously linger, despite assertions to the contrary. (As I have told software product support staff when they reported to me: "if the customer *thinks* he has a problem then there *is* a problem.") VSAM replaced ISAM -- how come PDSE has never gotten "good enough" to replace PDS? Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Tom Marchant Sent: Friday, September 13, 2013 4:45 PM To: [email protected] Subject: Re: PDS/E, Shared Dasd, and COBOL V5 On Fri, 13 Sep 2013 11:44:56 -0400, Charles Mills wrote: >I have to say I agree. If PDSEs are fundamental to the OS, then >internal OS code should support them. It does. But not early in the IPL process. In fact, there are important system components that are designed to use facilities that are available only in program objects, not in load modules. Those system components cannot reside in a PDS. >If they're not fundamental, then COBOL should not be requiring them. That is an excuse for you to be hesitant to use PDSE for your applications. Not a very good one, IMO. Do you have a business case that requires that PDSE support be available earlier in the IPL process? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
