On Tue, 31 Mar 2020 13:46:07 -0700, Charles Mills wrote:
>RECFM=V was not supported by ISAM.
It most certainly was. We used it in the early 1970s at Wayne State
University for the Admissions system.
See page 147 of the JCL Reference manual for OS/360 release 21.7
http://bitsavers.org/pdf/ibm/36
I believe you. You know, as I wrote that sentence a flicker of doubt ran
through my mind. I wonder if the true statement is "ISAM did not support
updating a record if the length changed."
There was some sort of ISAM shortcoming because a bunch of folks apparently
developed their own "VISAM."
> By the way, what ~is~ SVC 99?
First, note that three terms are used pretty much interchangeably: SVC 99,
DYNALLOC, and "Dynamic Allocation." I will use the term SVC 99 here. DYNALLOC
is an assembler macro that does not do much of anything except issue SVC 99.
(You know what a supervisor call
Don't forget the old ALLOCATE command for those running under TSO. It uses a
routine called Dynamic Allocation Interface Routine (DAIR) that mostly uses
DYNALLOC but does a few things for itself.
BTW, does BPXWDYN use DAIRFAIL to format error messages?
--
Shmuel (Seymour J.) Metz
http://mason.
Does that make a difference? The method for extracting DYNALLOC messages
is well-documented, like the rest of DYNALLOC... kudos to IBM on that.
There's some intricate code to write, but once you have, it's a nice thing
to have in your tool bag. BPXWDYN will conveniently return the messages in
a s
On Wed, 1 Apr 2020 09:01:12 -0700, Charles Mills wrote:
>I wonder if the true statement is "ISAM did not support updating a record if
>the length changed."
No, that's not true either. This from the previously mentioned ISAM Logiic
manual:
The WRITE KN macro instruction is used
with the READ
I'm sure many on this list will know the answer to this,
and I've been reading various manuals trying to find it...
But - if a primary task issues an ESPIE SET to establish
a ESPIE exit on a particular event, does that ESPIE exit
get control if an ATTACH'd sub-task triggers the event?
In my casu
I wouldnt think so. Normally ATTACH creates a boundary, and only certain
things can cross that boundary, like for instance, an ESTAI.
Joe
On Wed, Apr 1, 2020 at 1:26 PM Thomas David Rivers
wrote:
> I'm sure many on this list will know the answer to this,
> and I've been reading various manuals
(E)SPIE is associated only with the task issuing it.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List on behalf of
Thomas David Rivers
Sent: Tuesday, March 31, 2020 6:21 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subj
Does anyone have a link that works today to the page containing z/OS EOS
dates? This link:
http://www.ibm.com/systems/z/os/zos/support/zos_eos_dates.html
now just leads to the z/OS landing page:
https://www.ibm.com/it-infrastructure/z/zos
I can't find a link to any other page providing the ap
Try this:
https://www.ibm.com/support/lifecycle/#/
Rex
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Gord Tomlin
Sent: Wednesday, April 1, 2020 3:06 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External] z/OS EOS dates
Does anyone have a link that works today to the
Try here
https://www.ibm.com/support/lifecycle/#/
You can then search on the products you are looking for
Jerry Whitteridge
Delivery Manager / Mainframe Architect
GTS - Safeway Account
602 527 4871 Mobile
jerry.whitteri...@ibm.com
IBM Services
IBM Mainframe Discussion List wrote on
04/01/20
https://www.ibm.com/support/lifecycle/index.html#/
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Gord Tomlin
Sent: Wednesday, April 1, 2020 4:06 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: z/OS EOS dates
Does anyone have a link that works today to the page containing
It makes a difference whether the code issues the raw DYNALLOC error and reason
codes or an understandable explanation. It doesn't make a difference how a
clear message is generated., as long as the code is maintainable. DAIRFAIL and
the equivalent DYNALLOC are the easies way to do it. I'm not s
On 2020-04-01 16:24, Jerry Whitteridge wrote:
Try here
https://www.ibm.com/support/lifecycle/#/
You can then search on the products you are looking for
Thanks all...that worked. Bookmarked.
--
Regards, Gord Tomlin
Action Software International
(a division of Mazda Computer Corporation)
T
Huh. Well then, what WAS the purpose of VISAM?
Not arguing with you. Just wondering now. I KNOW my client had a home-grown
hybrid ISAM/BDAM access methond.
Charles
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Tom Marchant
Sent:
Speed? IIRC ISAM was awfully slow, especially if you didn't do mass updates in
high-key to low-key order (I remember at one of my early employers we saved a
TON of elapsed time in a nightly batch-add-update with that trick).
The VISAM that I am familiar with was a product of the ISV I worked fo
The EM* (sorry, that's how I recalled it) interface is to IEFDB476.
According to manual, DAIRFAIL is an alternative. The doc is in the Auth
Ass. Serv. Guide, Chapter 26, section "Processing messages from dynamic
allocation".
If you follow the instructions there, you'll get the messages you would
Isn't the easiest way to ask SVC 99 to issue the message?
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Steve Smith [sasd...@gmail.com]
Sent: Wednesday, April 1, 2020
What advantage do you see in an ESPIE over an ESTAE?
IIRC, there are quite a few conditions where it doesn't get control. And no
clean way to percolate.
On Tue, 31 Mar 2020 18:21:46 -0400 Thomas David Rivers
wrote:
:>I'm sure many on this list will know the answer to this,
:>and I've been rea
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