On Sun, 28 Jan 2018 09:40:55 -0700 Paul Gilmartin <[email protected]> wrote:
:>On 2018-01-27, at 13:03:48, Binyamin Dissen wrote: :>> On Sat, 27 Jan 2018 05:13:36 +0000 Jon Perryman wrote: :>> :>On Friday, January 26, 2018 7:05 PM, Paul Gilmartin wrote: :>> :>> Paul wrote: Does DCB provide functionality not available via DYNALLOC? :>> :>DCB is all about the program. There are multiple access methods that can be used (e.g. bsam, qsam). Each may require different parms and tells open/read/write how it wants to deal with the file. For example are you reading sequentially or reading CKD. :>> :>DD's (JCL and DYNALLOC) contain information that overrides information in the DCB. :>> Not at all. DCB overrides all. :>I believe that the OPEN exit can override options coded in DCB. That is code, not an overriding definition. :>And, finally, SDB has a chance to fill in a remaining blank. :>But I believe there are constructs available in JCL DD that :>don't exist elsewhere. Referback comes to mind. Yes. And DYNALLOC has options not available in JCL, such as return DDNAME. :>And I believe there's no way to specify a DSN in a DCB, as is :>possible with DYNALLOC. Correct. -- Binyamin Dissen <[email protected]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies.
