Discussion List on behalf of
Larry Chenevert
Sent: Thursday, February 14, 2019 9:26 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
I wonder: can I deallocate a dataset with DYNALLOC, that has been allocated
by the initiator because there is a DD statement?
Kees.
Table 1. Verb
Yes, you can. And it doesn't break anything. In CICS there is a utility
transaction, ADYN, that can be used to allocate/deallocate datasets. It calls
SVC 99 "under the covers". I've used it on many occasions to free allocations
in a CICS region that had been made via DD statements in the regio
I wonder: can I deallocate a dataset with DYNALLOC, that has been allocated
by the initiator because there is a DD statement?
Kees.
Table 1. Verb code 02 (dynamic unallocation) – Text unit keys, mnemonics,
and functions
Hex text unit key MnemonicDYNALLOC function
.
0007
du/~smetz3
From: IBM Mainframe Discussion List on behalf of
Paul Gilmartin <000433f07816-dmarc-requ...@listserv.ua.edu>
Sent: Tuesday, February 12, 2019 1:31 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
On Tue, 12 Feb 2019 18:25:34 +, Seymour J Metz wrote:
>Not i
February 12, 2019 3:52 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
On Tue, 12 Feb 2019 18:35:39 +, Seymour J Metz wrote:
>The free doesn't do a DEQ if another step needs the dataset.
>
Makes sense. Is it documented? Most probably in the description of
SVC 99, sin
On Tue, 12 Feb 2019 18:35:39 +, Seymour J Metz wrote:
>The free doesn't do a DEQ if another step needs the dataset.
>
Makes sense. Is it documented? Most probably in the description of
SVC 99, since it applies alike to all programs, foreground and batch.
-- gil
---
ent: Monday, February 11, 2019 4:13 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
On Mon, 11 Feb 2019 20:15:29 +, Seymour J Metz wrote:
>Only if the job doesn't have a subsequent step with a DD for the same dataset.
>
Why? I never did a DYNALLOC ALLOCATE; only a FREE, a
On Tue, 12 Feb 2019 18:25:34 +, Seymour J Metz wrote:
>Not in the normal course of events. Don't try this at home.
>
Why not?
o What's the hazard (beyond failure with a message)?
o Is that documented?
>From: Vernooij, Kees (ITOP NM) - KLM
>Sent: Tu
-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
I wonder: can I deallocate a dataset with DYNALLOC, that has been allocated by
the initiator because there is a DD statement?
Kees.
> -Original Message-
> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
u.edu/~smetz3
From: IBM Mainframe Discussion List on behalf of
Vernooij, Kees (ITOP NM) - KLM
Sent: Tuesday, February 12, 2019 2:24 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
Where does the term 'reference count' come from? If the initiator
Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
> Behalf Of Paul Gilmartin
> Sent: 11 February, 2019 22:14
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: DEQ dynamically
>
> On Mon, 11 Feb 2019 20:15:29 +, Seymour J Metz wrote:
>
> >Only if the job doesn'
, 2019 21:15
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: DEQ dynamically
>
> Only if the job doesn't have a subsequent step with a DD for the same
> dataset.
>
>
> --
> Shmuel (Seymour J.) Metz
> http://mason.gmu.edu/~smetz3
>
>
r J Metz
> Sent: 11 February, 2019 17:41
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: DEQ dynamically
>
> When the Initiator frees a dataset and no subsequent step has a DD for
> it, the Initiator does a DEQ. If there is a subsequent dynamic
> allocation, then the In
On Mon, 11 Feb 2019 20:15:29 +, Seymour J Metz wrote:
>Only if the job doesn't have a subsequent step with a DD for the same dataset.
>
Why? I never did a DYNALLOC ALLOCATE; only a FREE, and that should set
the reference count to 0.
Or does the reference count count each step mentioning the
v.ua.edu>
Sent: Monday, February 11, 2019 2:54 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
On Mon, 11 Feb 2019 16:40:49 +, Seymour J Metz wrote:
>
>BPXWDYN is just a fron end; ultimately it goes to the same DYNALLOC (SVC 99)
>as any other allocation.
>
>GRS ma
Discussion List on behalf of
Jake Anderson
Sent: Sunday, February 10, 2019 11:55 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: DEQ dynamically
Hi
Is it possible to deallocate a dataset without recycling address space.
The dataset is users one and for some reason I would like to know if we can
On Mon, 11 Feb 2019 16:40:49 +, Seymour J Metz wrote:
>
>BPXWDYN is just a fron end; ultimately it goes to the same DYNALLOC (SVC 99)
>as any other allocation.
>
>GRS maintains a global reference count for any resource, not just SYSDSN.
>
Does that imply that if I have a DSN allocated by a JC
Paul Gilmartin <000433f07816-dmarc-requ...@listserv.ua.edu>
Sent: Monday, February 11, 2019 11:13 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: DEQ dynamically
On Mon, 11 Feb 2019 06:43:14 -0600, John McKown wrote:
>
>One thing that I sometimes do is include a FREE=CLOSE on a DD if I am
On Mon, Feb 11, 2019 at 10:13 AM Paul Gilmartin <
000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
> On Mon, 11 Feb 2019 06:43:14 -0600, John McKown wrote:
> >
> >One thing that I sometimes do is include a FREE=CLOSE on a DD if I am
> >certain that the application will only read if once, say
On Mon, 11 Feb 2019 06:43:14 -0600, John McKown wrote:
>
>One thing that I sometimes do is include a FREE=CLOSE on a DD if I am
>certain that the application will only read if once, say at start up, for
>configuration information.
>
How does that work if a subsequent job step contains a DD stateme
Jake Anderson wrote:
>Is it possible to deallocate a dataset without recycling address space.
Why? What are you trying to solve? Or, rather, what are you trying to break?
In short - no. You stop the application [1].
>The dataset is users one and for some reason I would like to know if we can
List On Behalf Of
> Jake Anderson
> Sent: Sunday, February 10, 2019 9:55 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: DEQ dynamically
>
> Hi
>
> Is it possible to deallocate a dataset without recycling address space.
>
> The dataset is users one and for some reason I w
@LISTSERV.UA.EDU
Subject: DEQ dynamically
Hi
Is it possible to deallocate a dataset without recycling address space.
The dataset is users one and for some reason I would like to know if we can
Dynamically remove it from allocation
Jake
On Mon, Feb 11, 2019 at 6:14 AM Vernooij, Kees (ITOP NM) - KLM <
kees.verno...@klm.com> wrote:
> I am happy there is no command to deallocate a dataset behind the back of
> the application that enqueued it.
> Jikes.
>
> Kees.
>
>
I can envision writing an APF authorized program which could schedul
52
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: DEQ dynamically
>
> Do you mean using something like an operator command? If so, not that I
> know of.
>
> On Sun, Feb 10, 2019, 22:55 Jake Anderson wrote:
>
> > Hi
> >
> > Is it possible to deallocate a
Do you mean using something like an operator command? If so, not that I
know of.
On Sun, Feb 10, 2019, 22:55 Jake Anderson Hi
>
> Is it possible to deallocate a dataset without recycling address space.
>
> The dataset is users one and for some reason I would like to know if we can
> Dynamically r
Hi
Is it possible to deallocate a dataset without recycling address space.
The dataset is users one and for some reason I would like to know if we can
Dynamically remove it from allocation
Jake
--
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