On Tue, Nov 17, 2009 at 2:45 PM, Clark Morris wrote:
> On 16 Nov 2009 23:11:57 -0800, in bit.listserv.ibm-main you wrote:
>
> >Unfortunately, you're in a pretty difficult situation. In a perfect world
> I
> >would say that you should re-write the stuff correctly, but here in the
> real
> >world,
On 16 Nov 2009 23:11:57 -0800, in bit.listserv.ibm-main you wrote:
>Unfortunately, you're in a pretty difficult situation. In a perfect world I
>would say that you should re-write the stuff correctly, but here in the real
>world, you probably don't have the time to do that. You may not even know
Thank you all for your contributions.
First, this was posted on IBM-MAIN erroneously. It was only meant to
appear on the ASSEMBLER List. But thank you for your feedback anyway,
it was of great help.
Second, the subsystems do some significant work, for example, fast
communication
between IMS reg
ailto:ibm-m...@bama.ua.edu] On Behalf Of
Brian Westerman
Sent: Tuesday, November 17, 2009 1:10 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: user-written MVS subsystems
Unfortunately, you're in a pretty difficult situation. In a perfect world I
would say that you should re-write the stuff correctly, but
> Isn't serialization also a possible problem if doing your own chaining?
The OP indicated chaining was done with Compare & Swap.
Bob Shannon
Rocket Software
--
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Unfortunately, you're in a pretty difficult situation. In a perfect world I
would say that you should re-write the stuff correctly, but here in the real
world, you probably don't have the time to do that. You may not even know
how to do it the "right" way, but I think that you will probably work
On Mon, 16 Nov 2009 09:59:50 -0800 Edward Jaffe
wrote:
:>Bernd Oppolzer wrote:
:>> Maybe the services didn't exist yet when the original code was written?
:>Very likely.
Absolutely.
:>> What do you think of this, is it ok to do it this way? Are there any
:>> drawbacks? Do you have any hints in
On 16 Nov 2009 11:37:23 -0800, in bit.listserv.ibm-main
(Message-ID:)
martin.kl...@yrcw.com (Martin Kline) wrote:
If it were my code and I still supported it, then I'd
rewrite it to use the 'preferred' macro interfaces.
On 16 Nov 2009 12:24:03 -0800, in bit.listserv.ibm-main
(Message-ID:)
ies Software Support
-Original Message-
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of
Bernd Oppolzer
Sent: Monday, November 16, 2009 11:41 AM
To: IBM-MAIN@bama.ua.edu
Subject: user-written MVS subsystems
Dear listers,
at my customer's site there are some us
On Mon, 2009-11-16 at 14:36 -0500, Martin Kline wrote:
> If it was written in the eighties, there was little documentation and fewer
> macros to support subsystem interface.
IBM did teach basic SSI architecture in that two-week MVS internals
class.
> I remember spending many hours pouring over
>I started examining the code and observed that he doesn't use the services
>described in the books like "Using the Subsystem Interfaces", Chapter
>4, "Writing Your Own Subsystem", but instead he inserted the control blocks
>like SSCT and SSVT using GETMAIN and CS (taking care of parallel writers)
On Mon, 16 Nov 2009 09:59:50 -0800, Edward Jaffe
wrote:
>Bernd Oppolzer wrote:
>> Maybe the services didn't exist yet when the original code was written?
>
>Very likely.
>
>>
>> What do you think of this, is it ok to do it this way? Are there any
>> drawbacks? Do you have any hints in general? Wo
At my customer's site there are some user-written MVS subsystems,
written in the 80s and 90s. They seem to be very important and are in
production use every day. Now I was asked to take responsibility for
them, because the guy who wrote
Bernd Oppolzer wrote:
Maybe the services didn't exist yet when the original code was written?
Very likely.
What do you think of this, is it ok to do it this way? Are there any
drawbacks? Do you have any hints in general? Would you consider
to rewrite significant parts of these subsystems to
Dear listers,
at my customer's site there are some user-written MVS subsystems,
written in the 80s and 90s. They seem to be very important and are
in production use every day. Now I was asked to take responsibility
for them, because the guy who wrote them will be retired soon.
I st
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