Tommy,
The RTD at 30km is quite small, and the benefit of write spoofing will be small.
There is an option to turn on write spoofing with the FCP PPRC links on IBM
storage, but you should check with them that it is a benefit at small distances
on your model of storage at all write rates.
Ron
Rob,
The sweet spot for Basic Access Methods (BAM) and half track blocking used to
be 16. It is much larger with zHPF
BSAM and QSAM are limited to a chain length of 240KiB (please correct me if I
remember incorrectly), so the sweet spot used to be FLOOR(240KiB/blocksize)*2.
For 27998 it is 8 b
Tommy,
That's a really big question. You're talking about a complete batch tuning
exercise. The increased buffering is an old tuning hack, but with synchronous
replication, the primary benefit is for sequential writes where you can achieve
the Host/RIO overlap. It works equally well for the QSA
One suggestion and I'm talking Brocade here. Presumably Cisco have something
similar but I'm not familiar with those. Are we using multiple switches here
and are there ISLs between them?
If so, an ISL can only go 10km and then you should have the Extended Fabric
License. This allows you to a
https://devops.com/the-beauty-of-the-cobol-programming-language-v2/
--
Gabriel Goldberg, Computers and Publishing, Inc. g...@gabegold.com
3401 Silver Maple Place, Falls Church, VA 22042 (703) 204-0433
LinkedIn: http://www.linkedin.com/in/gabegoldTwitter: GabeG0
--
It seems like the HSM AUDIT command should be able to do this for you. Run
once to get the report. After a satisfactory sanity check, run again with
the FIX operand to do the work.
> -Original Message-
> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
> Behalf Of
Is there any way to improve the pprc command latency and round trip delay
time?
Anything can tune on DASD Hardware or switch side?
Anything can tune on os side? BUFNO,
Rob Schramm 於 2018年2月21日 星期三寫道:
> It used to be 20 or 25 buffers to establish the I/o sweet spot. Maybe with
> the faster dasd
The one time I sat with him after a Share presentation, he was super
helpful and patient...sent me a copy of a not til much later published
assembler book he had been working on. He was a true asset to the
assembler community.
Rob Schramm
On Tue, Feb 20, 2018, 5:49 PM Jesse 1 Robinson
wrote:
>
It used to be 20 or 25 buffers to establish the I/o sweet spot. Maybe with
the faster dasd the amount is different.
Rob
On Tue, Feb 20, 2018, 7:53 PM Tommy Tsui wrote:
> Hi Ron,
> You are right when I changed BUFNO to 255,
> The overall elapsed time reduce from 12mins to 6 mins,
> So what can
Hi Ron,
You are right when I changed BUFNO to 255,
The overall elapsed time reduce from 12mins to 6 mins,
So what can I do now,? Change BUFNO only ? How about vsam or db2
performance?
Ron hawkins 於 2018年2月21日 星期三寫道:
> Tommy,
>
> With PPRC, TrueCopy or SRDF synchronous the FICON and FCP speed a
For those that don't actually exist, we get
ARC1001I A.B.C.E RECALL FAILED, RC=0002,
ARC1001I (CONT.) REAS=
ARC1102I DATA SET IS NOT MIGRATED/BACKED UP
I think the two pass approach should work. Thanks.
.
.
J.O
John was at SHARE in Providence in August. The week seemed to perk him up. We
were even planning an Assembler Academy until he recently took a turn for the
worse. I'm glad we got to see him then.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Pr
Cataloged MIGRAT2 and don't actually exist?
IDCAMS since (1.13, maybe 2.1) will convert a DELETE to an HDELETE (and not
recall) for migrated datasets.
Generate IDCAMS DELETE for all and reset the RC. Make a second pass of DEL NSCR
for what's left
> -Original Message-
> From: IBM Mainfra
John was a lot more than a supporter of Greg's modification to Assembler H and
ultimately HLASM. We will miss him.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List on behalf of
Tony Thigpen
Sent: Tuesday, Fe
We have situation where a lot of data sets are incorrectly cataloged to HSM
MIGRAT2. For an individual case, I can try HDELETE. If I get the message that
data set is not migrated, I can issue DEL NSCR.
However we have thousands of these. We can CSI list them by data set name
pattern. I don't re
Registration for Hillgang – the DC/MD/VA z/VM and Linux User Group - is open at
https://doodle.com/poll/fvg86gk7hdkwk6f2
Agenda and logistics are available at http://www.vm.ibm.com/events/HILL0318.PDF
Neale
--
For IBM-MAIN subs
On 2/20/2018 2:50 PM, Tony Thigpen wrote:
I am deeply saddened to report that John passed away this morning (Tuesday, 20
February 2018) following a protracted battle with cancer.
I am also deeply saddened. John tended to speak quietly and was a kind
and thoughtful person. Yet his work with
John was an exceedingly gracious individual without whom a lot of us would have
been lost.
--
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
> That should get passed thru the TU to SVC 99.
Which will in turn expand the system symbol &DATE into 180220. I think @Gil has
a UNIX file that is named literally &DATE.
"Doc, it hurts when I hit myself in the head with a hammer."
"So don't hit yourself in the head with a hammer."
That said, m
Those of you who have followed this list for years know well that Dr. John
Ehrman was the motivating force behind the development of the High-Level
Assembler (I often referred to him as the God Father of HLASM).
I am deeply saddened to report that John passed away this morning (Tuesday, 20
Febr
I am assuming that you have something like this:
DC'/u/myself/&DATE'
If &DATE is not defined, you should get an error.
I would think, and do not have time to test this right at this point, you want
this construct:
DC'/u/myself/&&.DATE'
That should get passed thru the TU to S
JCL Reference (I know, not the same thing, but a definite source of clues) says
Ampersands are used in JCL to indicate the beginning of a symbolic parameter
(see “Using system symbols and JCL symbols” on page 38). If a parameter contains
an ampersand and you do not want the system to interpret the
In:
z/OS IBM MVS Programming: Authorized Assembler Services Guide
Version 2 Release 3 SA23-1371-30
Chapter 26. Requesting dynamic allocation functions
SVC 99 parameter list verb codes and text units, by function
Using system symbols in text units
I see:
You can use syste
Tommy,
With PPRC, TrueCopy or SRDF synchronous the FICON and FCP speed are independent
of one another, but the stepped down speed elongate the Remote IO.
In simple terms a block that you write from the host to the P-VOL takes 0.5ms
to transfer on 16Gb FICON, and but then you do the synchronous
On Tue, Feb 20, 2018 at 1:08 PM, Ron hawkins
wrote:
> John,
>
> Have you thought about how to signal updates to pages in the LDS to other
> jobs and LPARs?
>
I write selfish programs. So they don't worry about sharing! {grin}
I am going to be looking at this for a "port" of SQLite to z/OS whic
On Tue, Feb 20, 2018 at 1:04 PM, Binyamin Dissen wrote:
> On Tue, 20 Feb 2018 09:55:19 -0600 John McKown <
> john.archie.mck...@gmail.com>
> wrote:
>
> :>I know that it is possible to use DIV (Data In Virtual) to "map" an LDS
> :>into an address space. And then use "windowing services" to move th
John,
Have you thought about how to signal updates to pages in the LDS to other jobs
and LPARs?
Hiperbatch is a great way to accomplish what you are trying to do, but there is
exposure if you share the data set.
Ron
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MA
According to the message the IGGCL0FM-2 shows the DADSM Scratch status code.
According to DFSMS DFP Diagnosis, this status code could mean:
2 (X'02')
One of the following conditions occurred:
- The data set could not be scratched because the console operator or TSO/E
terminal operator did not s
On Tue, 20 Feb 2018 09:55:19 -0600 John McKown
wrote:
:>I know that it is possible to use DIV (Data In Virtual) to "map" an LDS
:>into an address space. And then use "windowing services" to move the
:>"window" around within the LDS.
:>What I would really like to do is have an LDS. And, somehow,
I created an SHARE requirement (if you're a member you can find it at this
link: https://www.share.org/p/is/vi/iid=154&type=12 ) about this, but I'd love
to hear some discussion so I'm posting here too. My idea is that when IBM
offers some new "outboard" capability such as zEDC, they need to pr
When I last worked on this, we used CA-1's catalog retention (RETPD=99 if I
recall) for the GDGs, but because of the 255-entry GDG limit we had to do some
'merge jobs' to combine various archive "tapes" (ours were redirected to disk
by Tape Mount Management) so we could have a year or two
In the TSSO automated response table, how do I code a OSCMD type entry
when I want to execute a TSSO proc?
I tried "EXT='?STRTCICP', but that does not seem to work.
The log shows:
(TSSO AOF): ?STRTCICP
?STRTCICP
# OK
but the command in the STRTCICP TSSO proc are not executed.
Using ?STRTCICP f
Look up HIPERBATCH (been around since MVS/ESA). It is pretty much exactly what
you are looking for.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of John McKown
Sent: Tuesday, February 20, 2018 9:55 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subj
What you're describing is a memory mapped file. It's an old idea, and even IBM
has implemented it - just not on MVS. Other than NIH, I don't know why they
haven't.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion L
A switch can relieve the limitation, because it's actually limitation of
SFP (electro-optical converter). You can replace SFP in the switch so
your new CPC is connected to 16 or even 32 Gbps SFP in a switch, but
your old CU is still connected to a 4 Gbps SFP, which can slow down to 1
Gbps. And
I know that it is possible to use DIV (Data In Virtual) to "map" an LDS
into an address space. And then use "windowing services" to move the
"window" around within the LDS.
What I would really like to do is have an LDS. And, somehow, have an API
which would take this LDS and create a data space fo
Printed Page numbers 63-64 of
https://www.redbooks.ibm.com/redbooks/pdfs/sg245444.pdf
Ficon Express 16 will negotiate down to 8 or 4.
Ficon Express 8 will negotiate down to 4 or 2.
You will need to upgrade Dasd Ficon cards or downgrade mainframe Ficon
Express cards.
I don't know if there is a spee
On Mon, 19 Feb 2018 14:13:27 -0600, Paul Gilmartin wrote:
>How about USASCII? Is that unambiguously the 7-bit set?
>
>I've encountered two EBCDIC C implementations. One of them returned "true" if
>the EBCDIC character translated to ASCII was a USASCII character. The other
>returned :true" simpl
No; the customer might be using different code pages for different things.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List on behalf of
scott Ford
Sent: Monday, February 19, 2018 9:08 AM
To: IBM-MAIN@listser
The problem is not that the term "ASCII" is ambiguous; it isn't. The problem is
that people don't understand what ASCII is and refer to things that aren't
ASCII as "ASCII". Code pages like 437, 850 and ISO-8859-x aren't ASCII, and if
IBM documentation refers to them as ACII then that is a disser
The RACD SMF type 80 records contains flags to indicate when a record was
logged due to SPRCIAL of OPERATIONS.
I know the flags are set when the access is at the system level authority.
Are they set when the access is at the group level?
If they are set at the group level:
How does one differenti
Hi Ron,
What happens to if our ficon card is 16gb, and fcp connection is 2gb, I try
to do the simulation on monoplex lpar , the result is fine, now we are
suspect the GRS or other system parm which will increase the disconnect time
Ron hawkins 於 2018年2月
15日 星期四寫道:
> Tommy,
>
> This should not
No, nothing automatically was done.
The situation is a bit more clear now: we saw the 0A2 waitstatecode when the
problem occurred, but did not note the reason code. When I wanted to check this
later, I couldn't find it anymore in the hardware messages.
The reason is that the operator wants a cl
43 matches
Mail list logo