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Subject: Re: [EXTERNAL] Re: IBM BLSR subsystem
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When change means being able to more co
Mainframe Discussion List On Behalf Of
Pommier, Rex
Sent: Friday, May 20, 2022 9:31 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [EXTERNAL] Re: IBM BLSR subsystem
At some sites, the most gargantuan thing about making a change like this is
getting past the politics of getting managers who don't want
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: IBM BLSR subsystem
Excuse me, what is gargantuan in moving to extended format?
Note: we are talking about *application* datasets, not ICF, SyS1.MANx, system,
VVDS or whatever.
Note2: it need NOT to be big bang approach, you can change definitions
Jim - You forgot the "good day" in your closing! ;)
Steve Kocik
z/OS IOS Development
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Sent: Thursday, May 19, 2022 7:52 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
Excuse me, what is gargantuan in moving to extended format?
Note: we are talking about *application* datasets, not ICF, SyS1.MANx,
system, VVDS
.
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of Jim
Mulder
Sent: Thursday, May 19, 2022 12:55 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
BLSR was initially developed by Washinton System Center as an assembler language sample
program to go along
( = 'PO') SET ='NONEXT'
OTHERWISE SET ='EXT'
END
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Michael Watkins
Sent: Thursday, May 19, 2022 11:31 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
[External Email. Exercise caution when
format?
I don't mean to make a project for you, but any light you could shed would be
appreciated.
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
PINION, RICHARD W.
Sent: Thursday, May 19, 2022 10:04 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
On
Behalf Of Michael Watkins
Sent: Thursday, May 19, 2022 9:48 AM
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Subject: Re: IBM BLSR subsystem
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From: IBM Mainframe Discussion List On Behalf Of
Michael Watkins
Sent: Thursday, May 19, 2022 10:57 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
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For the past few years, I've been looking
Of
Michael Watkins
Sent: Thursday, May 19, 2022 9:48 AM
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Subject: Re: IBM BLSR subsystem
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: Re: IBM BLSR subsystem
BLSR was initially developed by Washinton System Center as an assembler
language sample program to go along with a book they were writing about using
the Subsystem Interface. At the time, IBM was desperately looking for "ESA
Exclusives" in order to sell 3090 m
ry <00a5644c6d08-dmarc-requ...@listserv.ua.edu>
Sent: Wednesday, May 18, 2022 5:43 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [EXTERNAL] Re: IBM BLSR subsystem
>IIRC, Batch LSR was developed at IBM by the BCP team; SMB was later developed
>by the DFdfp team. SMB is not BLSR
Of
kekronbekron
Sent: Monday, May 16, 2022 11:07 PM
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Subject: [EXTERNAL] Re: IBM BLSR subsystem
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. Some z/OS features
> don't change very fast. A JCL reference from 1994 would be adequate for 99%
> of all inquires.
>
>
> -Original Message-
> From: IBM Mainframe Discussion List IBM-MAIN@LISTSERV.UA.EDU On Behalf Of
> Mark Jacobs
>
> Sent: Monday, May 16,
.
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Mark Jacobs
Sent: Monday, May 16, 2022 11:46 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
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t half the savings but
DEFERW did the rest.
Rex
-Original Message-
From: IBM Mainframe Discussion List On
Behalf Of Michael Oujesky
Sent: Monday, May 16, 2022 3:30 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [EXTERNAL] Re: IBM BLSR subsystem
AMP will be fine for setting BUFNI or
was responsible for about
half the savings but DEFERW did the rest.
Rex
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Michael Oujesky
Sent: Monday, May 16, 2022 3:30 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: [EXTERNAL] Re: IBM BLSR subsystem
AMP will be fine for setting
Of Michael Oujesky
Sent: Monday, May 16, 2022 2:23 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: IBM BLSR subsystem
PDF -
https://urldefense.com/v3/__http://publibz.boulder.ibm.com/epubs/pdf/iea5j600.pdf__;!!KjMRP1Ixj6eLE0Fj!qkxYWCkBfDGHDC7oenAm5D9KqrxkJrY3t_3JVFdCV
f
Michael Oujesky
Sent: Monday, May 16, 2022 2:23 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: IBM BLSR subsystem
PDF -
https://urldefense.com/v3/__http://publibz.boulder.ibm.com/epubs/pdf/iea5j600.pdf__;!!KjMRP1Ixj6eLE0Fj!qkxYWCkBfDGHDC7oenAm5D9KqrxkJrY3t_3JVFdCVrbQCkmMcgu-pyPE7GDVRGT
I should have mentioned that (as I recall) BLSR allows forcing pool
sharing so that if multiple VSAM files are being randomly processed,
there might be memory savings from forcing some to share the same LSR pool.
Michael
At 02:23 PM 5/16/2022, Michael Oujesky wrote:
PDF -
PDF - http://publibz.boulder.ibm.com/epubs/pdf/iea5j600.pdf
BLSR will help principally if the access is random and the locality
of reference of the data component is good. Otherwise, just
increasing the BUFNI and/or BUFND will suffice. Note that for
sequential access a BUFND of twice the
e your sort, I am attempting that same project at my site.
Thank You
bill
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Massimo Biancucci
Sent: Monday, May 16, 2022 1:40 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External Sender] Re: IBM BLSR subsystem
Hi,
we change
I would love to see your sort, I am attempting that same project at my site.
Thank You
bill
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Massimo Biancucci
Sent: Monday, May 16, 2022 1:40 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External Sender] Re: IBM BLSR
Hi,
we changed many JCLs using " AMP=('ACCBIAS=DO')" and succeded in CPU and
elapsed time reduction (up to 50% in few cases).
We used SMF64 to choose the best candidates.
If needed, I can share a simple SORT step to convert SMF64 to "readable"
CSV file.
Best regards.
Max
Il giorno lun 16 mag
The subsysten initialization module is still in SYS1.LINKLIB for z/OS 2.5.
There's an eyecatcher with 17259 and HBB77C0 in it.
Mark Jacobs
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---
Building upon Mark and Peter's replies...
Having retired in 2005, I can’t be absolutely certain, but it is highly
likely that it is still supported, as I am finding reference to Batch LSR
when searching z/OS 2.5 manuals.
If you have MXG in your shop, potential candidates for batch LSR can be
--Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Mark Jacobs
Sent: Monday, May 16, 2022 10:56 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IBM BLSR subsystem
Take a look at the AMP=ACCBIAS keyword. It specifies the assigned VSAM System
Managed Buffering specification.
Mark Ja
Take a look at the AMP=ACCBIAS keyword. It specifies the assigned VSAM System
Managed Buffering specification.
Mark Jacobs
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--- Original Message
Hi list,
Is the BLSR subsystem (batch local shared resources) still a viable/valuable
thing or has it been replaced by something bigger/better/faster? I seem to be
stuck in the mid-90s because the most current documentation I can find on it
is from MVS/ESA 5.1 dated 1994. Is there more
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