Peter, you definitely answered the question I intended to ask.
Thanks, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs: MartinPacker
Blog: https://mainframeperformancetopics.com
z/OS. I'd love to be talking about them again and supporting customers
using them. But I'm just a field guy.
Cheers, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs: MartinPacker
B
Between steps can't be pipes, can be VIO. Between jobs can be pipes, can't
be VIO.
That second sentence depends on the ability to schedule two jobs (possibly
originally steps of the same job) alongside each other.
Fun stuff but / and somewhat complex - which is what inspired me to start
I, too, put DSN first. More importantly to me, I put it on a separate
line. That makes ISPF File Tailoring more reliable and I'm often wanting
to change the data sets I'm pointing at.
But then I'm not exactly in a Production shop.
Martin Packer
WW z/OS Performance, Capacity and Architecture
if it's feasible to tell a sorting
stage (whether DFSORT (yes please Sri Hari) or otherwise) the input size.
Otherwise we could have blow ups or bad performance at scale.
BTW I'm all in favour of pipes as a first class citizen but note I have
little influence in this regard.
Cheers, Martin
Martin
"a fully configured parallel sysplex" - in the sense you meant it - is
something I see less often than I'd like. :-(
As a Performance guy, often the conversations I have with customers - based
on their data - have a big dollop of Resilience in them.
There are those that have embraced "a fully
I think it's gone. Does anyone still have a PDF of it?
Thanks, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs: MartinPacker
Blog: https://mainframeperformancetopics.com
Thank you KB!
You can imagine my disappointment at finding all the links to it at the
IBM Redbooks site to be broken.
Cheers, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs
SMF 78-2 RMF Virtual Storage Activity data / report is what I'd use. But I note
it might not be that helpful with spikes.
https://mainframeperformancetopics.com/2020/01/05/how-i-look-at-virtual-storage/
is more relevant than
Look up "SS,EQ," in the manual.
Cheers, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs: MartinPacker
Blog: https://mainframeperformancetopics.com
Mainframe, P
A useful analogy here might be Db2 - which is selective about which areas
it dumps. (Certainly around the "relatively low value" buffer pools.) You
might want to ask on CICS-L which areas CICS might exclude from a dump.
Cheers, Martin
Martin Packer
WW z/OS Performance
Late to the party, I'm wondering what SMF 30 says.
Cheers, Martin
Martin Packer
WW z/OS Performance, Capacity and Architecture, IBM Technology Sales
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Facebook IDs: MartinPacker
Blog: https://mainframeperformancetopics.com
Mainframe
episode of our podcast.)
One limit you didn’t mention – but I found of interest recently – is CFCC. I’m
told the limit for that is 3TB. (Customer was at 2TB and could use more – so
this was not academic.)
Hoping this helps.
Martin Packer, Senior Performance, Capacity, Architecture Specialist
And “100% busy” is the wrong criterion – if you want your system to be
performant.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Peter Relson
Date: Tuesday, 5 September 2023 at 13:13
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: Switching between SMT-1 and SMT-2
Remind me, Scott (or anybody): Does switching modes cause a WLM reset? Might
not be something you want to do throughout the day – if so.
Thanks, Martin
From: IBM Mainframe Discussion List on behalf of
Scott Chapman <03fffd029d68-dmarc-requ...@listserv.ua.edu>
Date: Tuesday, 5 September
] Re: Switching between SMT-1 and SMT-2
On 5/09/2023 10:30 pm, Martin Packer wrote:
> And “100% busy” is the wrong criterion – if you want your system to be
> performant.
Isn't that what WLM is for?
25 years ago I did a WLM conversion on a single CPU system. A single CPU
is probably the most
Minor correction – evident in the SMF data: One SAP runs SMT-1; The rest run
SMT-2.
(My code does, of course , take this into account.)
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Attila Fogarasi
Date: Wednesday, 6 September 2023 at 09:41
To: IBM-MAIN@LISTSERV.UA.EDU
Glad there's still interest in that one. I'm rather proud of it. :-)
Seriously, much of what we wrote is still valid. There are just a few places
where more modern techniques exist.
Cheers, Martin
Sent from my iPad
> On 1 Jul 2022, at 02:25, Sri h Kolusu wrote:
>
>
>>
>>> Does anyone
If it moves to another machine is it still the same LPAR?
From: IBM Mainframe Discussion List on behalf of
Matt Hogstrom
Date: Wednesday, 28 September 2022 at 13:59
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] SYSPLEX / SYSNAME / SMFID stability
We had an internal debate about the
“Customers do the darnedest things…”
From: IBM Mainframe Discussion List on behalf of Ed
Jaffe
Date: Thursday, 29 September 2022 at 22:57
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: SYSPLEX / SYSNAME / SMFID stability
On 9/29/2022 5:19 AM, Mark A. Brooks wrote:
> Right, I'm not
How much JNI, though? That isn't zIIP eligible.
Cheers, Martin
> On 11 Aug 2022, at 23:07, Longnecker, Dennis
> wrote:
>
> We run a lot of JAVA workloads under WebSphere Liberty on our z15.
>
> We are seeing hardly any utilization on our 2 specialty engines (ziip/zaap).
> It is my
You don’t need a dedicated engine to test CF – unless your test is a
Performance test. And then possibly a single one wouldn’t be helpful. Function
test should be fine with any old engine.
From: IBM Mainframe Discussion List on behalf of
Laurence Chiu
Date: Sunday, 5 March 2023 at 14:05
To:
Hi Al!
Re “ I don't recall how a CF LPAR using GCPs showed up.” It shows up with
logical processors in Pool 1 (GCP Pool). It’s discernable as a CF LPAR using
SMF 74-4 which contains Serial and LPAR Number, amongst other identifying
things.
It’s rare I see it but I DO see it.
Cheers, Martin
Further to Bonnie’s point, I think I’d want to deactivate unused LPARs to get
the weights and HiperDispatch to work right for the active LPARs.
But tell me, how long should it take to activate an LPAR prior to IPL’ing it?
Thanks, Martin
From: IBM Mainframe Discussion List on behalf of
Bonnie
m, i.e.
stand alone utility. I believe it will be also Operating and no SMF.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 24.02.2023 o 13:31, Martin Packer pisze:
> An interesting question is how to tell – from RMF – if an LPAR is shutdown
> but not deactivated. In my own code I use the term “i
An interesting question is how to tell – from RMF – if an LPAR is shutdown but
not deactivated. In my own code I use the term “idle” – which means near zero
CPU – as that’s the closest I know how to get.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Radoslaw Skorupka
s/was/is
From: IBM Mainframe Discussion List on behalf of
Roger Bolan
Date: Wednesday, 1 March 2023 at 01:07
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: BookManager
The B2H tool was BookMaster source to HTML, not BookManager
On Tue, Feb 28, 2023, 11:19 AM Colin Paice wrote:
>
B2H does BookMASTER to HTML, not BookManager to PDF. (And, yes, HTML to PDF is
probably trivial for most people.)
I use B2H on TSO in Batch almost daily, FWIW.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Colin Paice
Date: Tuesday, 28 February 2023 at 18:19
To:
Because I haven't found a free 3270 Host Graphics emulator I've taken to
converting all the graphics I create using ADMUGIF to GIF. These I download
BINARY.
I don't suppose this helps the OP.
Cheers, Martin
Sent from my iPad
> On 20 Apr 2023, at 16:31, Dave Jones wrote:
>
> Unfortunately,
Not to answer the question but to note you can see zHPF effectiveness in SMF 73
Channel Path Activity data.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Jantje. <033acf17e42f-dmarc-requ...@listserv.ua.edu>
Date: Friday, 14 April 2023 at 13:02
To:
Hint: A count might be achieved by summing the constant X’0001’ inserted
into qualifying rows. (That is if you don’t want to do it in eg OUTFIL.)
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Billy Ashton
Date: Monday, 27 March 2023 at 16:03
To: IBM-MAIN@LISTSERV.UA.EDU
Hi Al! (et al)
I’ve also asked for eg 02-12345 to be added – quite a while ago. I also was
turned down. But then I’m not a customer…
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of Al
Sherkow
Date: Tuesday, 14 February 2023 at 16:39
To: IBM-MAIN@LISTSERV.UA.EDU
Subject:
e-
From: IBM Mainframe Discussion List On Behalf Of
Martin Packer
Sent: Thursday, July 6, 2023 2:34 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: What happened to GC26-1672 Batch Local Shared Resource(LSR)
Documentation?
I rather thought the modern way was with built in things like access bias,
rat
I rather thought the modern way was with built in things like access bias,
rather than relying on a subsystem.
Is there a particular reason you need BLSR?
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Farley, Peter <031df298a9da-dmarc-requ...@listserv.ua.edu>
Date:
A small aside: That’s a pretty good estimate of the record count you’ve got
there. FB by any chance?
From: IBM Mainframe Discussion List on behalf of Don
Johnson <02ee771a0785-dmarc-requ...@listserv.ua.edu>
Date: Wednesday, 5 July 2023 at 14:37
To: IBM-MAIN@LISTSERV.UA.EDU
Subject:
At the risk of duplicating what others have said – as this thread has run long…
… I would prefer specifying FILSZ over relying on static sort work allocations
– for the cases where DFSORT needs help in working out how much data needs
sorting.
Also, you can MEASURE sort work tracks allocated
I think we had two 3279-3B’s in our branch. The rest were 3278’s.
Recall IBM had gone to PROFS-based email at that point (mid 1980’s) so
terminals were something everybody in the branch needed.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of Jay
Maynard
Date: Thursday, 27
I presented – briefly – on this yesterday at the Munich Resilience/Resiliency
conference.
Yes, SMF 74-4 tells you what IS – and perhaps tells you stuff to make you
resize structures.
To the point, though: You need to think through the scenarios – both for memory
and CF CPU. For example, you
A couple of points to make:
1) The “up to 70%” makes 70% a target, not a guarantee.
2) Only certain python libraries are zIIP eligible. Think about the case where
someone wraps their COBOL program in just enough C to make a python module.
Then – if we didn’t have this specific list – that
Good study of SMF 74-4 would certainly help.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Mark Jacobs <0224d287a4b1-dmarc-requ...@listserv.ua.edu>
Date: Wednesday, 14 June 2023 at 19:06
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Coupling Facility Structure
to see whether our CFRM policy needs to be adjusted for the new
CFCC level.
Mark Jacobs
Sent from ProtonMail, Swiss-based encrypted email.
GPG Public Key -
https://api.protonmail.ch/pks/lookup?op=get=markjac...@protonmail.com
--- Original Message ---
On Friday, June 16th, 2023 at 7:36 AM,
In the back of my mind I also think that the crypto processing for TCP/IP
could be performed on a zIIP processor (which could be using its CPACF, of
course).
Lennie, or anybody who knows, which address space would show zIIP CPU time
under those circumstances? I’m assuming TCP/IP address
TLS. I think you are correct that this would show against the TCP/IP
address space. But I think you should confirm that with others. (e.g. Chris
Meyer)
Lennie
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Martin Packer
Sent: 24 January 2024 10:10
To: IBM-MAIN@LISTSERV.
yption and decryption - processor or TCPIP
Matin said " Easily managed by provisioning enough zIIP."
As one of my old manager's used to say, "you can solve anything with a pot
of gold".
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Martin Packer
Sent: 24 Janua
I’m assuming that when STSI was enhanced for z16 – and it was a great
enhancement – all the ways of calling it were able to support the new
information (and any environmentals).
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Attila Fogarasi
Date: Saturday, 3 February 2024
An E15 exit could do it – except it might be called too frequently. But
probably STCKE would work. I think that’d be expensive, though.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Massimo Biancucci
Date: Thursday, 1 February 2024 at 15:12
To: IBM-MAIN@LISTSERV.UA.EDU
I think this is the same shell as Mac OS. I use it there a bit – but getting
stronger. Right now I don’t have a 3.1 system to play with (and rarely do Unix
stuff on z/OS anyway).
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Frank Swarbrick
Date: Friday, 16 February 2024
-zsh
Thanks Ed!
From: IBM Mainframe Discussion List on behalf of Ed
Jaffe <05acc3c79bf7-dmarc-requ...@listserv.ua.edu>
Date: Saturday, 17 February 2024 at 16:04
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: zsh for z/OS
On 2/17/2024 2:34 AM, Martin Packer wrote:
>
Message-
> From: IBM Mainframe Discussion List On
> Behalf Of Martin Packer
> Sent: Sunday, November 26, 2023 2:39 AM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: SQA overflow condition
>
> [CAUTION: This Email is from outside the Organization. Unless you
> trust the sender, D
and deactivated SYSCONS from operating system message
console in HMC
On Tue, Dec 12, 2023, 2:34 PM Peter wrote:
> Are there any tools available in cbttape to view 78-2 ?
>
>
>
> On Tue, Dec 12, 2023, 2:01 PM Martin Packer
> wrote:
>
>> Right. To Allan’s point it
ification: Confidential
>
> 100% concur w/Martin
>
> -Original Message-
> From: IBM Mainframe Discussion List On Behalf
> Of Martin Packer
> Sent: Sunday, November 26, 2023 2:39 AM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: SQA overflow condition
>
(This is not specific advice but a way of thinking about things.)
SQA can, of course, overflow into CSA - with no real harm done. Unless it
causes CSA to go short. (CSA can't overflow into SQA, of course.)
The above statements are true for both 24-bit and 31-bit.
1409K below the line, though,
This thread has got me thinking about services like IFTTT and Pushcut to handle
notifications etc from the HMC.
But then I guess none of you would be allowed to build anything around them.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Grant Taylor
retired so I don't have any
> additional details I can give you around the SAS code.
>
> Paul
>
> -----Original Message-
> From: IBM Mainframe Discussion List On Behalf
> Of Martin Packer
> Sent: Sunday, November 26, 2023 2:39 AM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Sub
If I’m interpreting the z16 materials right it’s within the core’s area.
From: IBM Mainframe Discussion List on behalf of
Eric D Rossman
Date: Thursday, 25 January 2024 at 15:07
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [EXTERNAL] Re: Encryption and decryption - processor or TCPIP
> Actually,
To my mind the real problem is making the data consistent and make sense.
BTW names are one thing but Plant/Serial is a good example of something that’s
at least a machine identifier.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
Radoslaw Skorupka
My Dad (now long since retired) worked with 1904’s and then 29xx and 39xx.
(He also had IBM kit in the end – 3090 – but that isn’t really how I got into
IBM.)
I think there was / is a 1904 in the Science Museum in London.
Cheers, Martin
From: IBM Mainframe Discussion List on behalf of
They should be below Db2 Engine in the hierarchy…
IRLM should be in SYSSTC.
DBM1, MSTR, DIST should be in Importance 1, CPU Critical.
DDF transactions should be Importance 2 on downwards.
Right now you have DDF work fighting with Db2 – in whatever shaped boxing ring.
Cheers, Martin
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