at, in spite of your best attempts, the
unthinkable has happened, are you prepared to deal with it competently, calmly,
and quickly?
Alan Altmark
IBM Systems Lab Services
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g additional cabinets no longer affected
the I/O configuration - just capacity.
We still have switches, of course, but they're no longer pull-turn-push. :-)
Alan Altmark
IBM Systems Lab Services
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On Wed, 15 May 2019 21:41:20 +, Seymour J Metz wrote:
>That may be true for 2314, but it is not true for anything later. The A unit
>connects to the control unit, not to the channel.
>
I actually intended to say that the A units connected to the control unit. I
don't know why I said "chan
th 3990 being the last one on the
floor. (BTW, once someone explains CU integration, the whole A/B model
numbering thing makes more sense.) I had always assumed that latency was
driving engineers to shorten the distance between CU
n of the underlying technology.
Fun times.
Alan Altmark
IBM
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espond to any
action messages it sees. (Yup, might be a race between human and machine,
but I expect the machine to win that race.)
Thanks.,
Alan
Alan Altmark
Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
Phone: 607-429-3323 | Mob
NOTE: SRDF and PPRC are similar, but they are not compatible with each other..
Metro Mirror = Exploitation of PPRC to manage the local mirrors..
Global Mirror = Exploitation of aynch PPRC to manage remote mirrors.
The names were changed to avoid dragging everyone down a rabbit hole as the
tech
On Tue, 14 Mar 2023 12:45:27 +, Peter Relson wrote:
>
>What I would especially like to be able to know under z/OS are the following
>timer values:
>
>DST offset - The Daylight Savings Time (DST) offset relative to UTC in minutes.
>
>And what's missing - even from lsstp - is the date and time
the platform.
It's not a new concept, Enzo. IBM has always had models at the low end, and
this is the 3rd generation in a row to be available in a 19-inch form factor
(rack mount).
Alan Altmark
IBM
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nvoke
another MODULE without worrying about overlays. That code you have to read the
module header isn't needed.
This functionality was introduced into CMS around 1985 (VM/SP Release 4). In
general, VM/370 is not a good place to develop applications that you intend to
run on z/VM.
Alan A
If you change to use HiperSockets, you will
start to burn the Z CPU. If you have the headroom, no problem, but the more
data you move, the more CPU you burn.
Alan Altmark
z/VM Development
IBM
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x27;s unlikely to
ever change. And once DFSMS were to add that support, the TMS (e.g. IBM Tape
Manager) would need to exploit it.
Alan Altmark
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sn't have the LIBRARY command, you can't do a PARTRFSH MMOUNT.)
So, it *can* be done, but any management has to be done via the UI. The TMS
cannot adjust the management constructs.
Alan Altmark
Senior z/VM Architect and Consultant
IBM
7;s ok to mix IP and ETHERNET mode traffic on the same OSA, but it's possible
there is some kind of issue with the MAC address that VM is using because of
ETHERNET mode. (It gets a new MAC address from the OSA.)
Alan Altmark
IBM
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rovide full ethernet frames, with MAC headers. Without
ETHERNET, it defaults to "IP" which is also known as "layer 3", in which the
driver provides only IP packets, not ethernet frames, and the OSA takes care of
adding the MAC headers.
Alan Altmark
IBM
On Mon, 23 Dec 2019 15:08:02 -0700, Grant Taylor
wrote:
>Where is it cross posted from / to? (I'd like to look at the other
>location.)
IBMTCP-L is where the meat of the discussion is taking place.
Alan Altmark
IBM
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FICON subchannels.
Regards,
Alan Altmark
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from the very beginning?
Yes, I could tell him to RTFMs, but there's a lot of FMs to R and I'd like to
point him in the right direction so he can start digging.
Thanks for your help.
Alan Altmark
z/VM Consultant
I
tried to see if I could re-establish contact my old PSF/VM
test environment, but there was nothing but faint echoes and cobwebs where code
and configuration files used to live, though I did find the SFCM and PDMREM1
userids still extant after all this time. (sniff)
Alan Altmark
z/VM Consul
On Mon, 10 May 2021 12:56:42 +, Seymour J Metz wrote:
>CMS originally ran on a real S/360 or on a S/60 virtual machine under CP-67.
>The CMS for VM/370 through VM/SP ran
> on a virtual S/370. When did CMS stop requiring S/370 mode and when did it
> stop supporting S/370 mode (if it did)?
I
ations using the 370 accommodation feature which became available
in VM/ESA Version 1 Release 2.1. Verifying the execution of applications with
the 370 accommodation feature allow customers to position those applications to
run in XA or XC mode virtual machines under VM/ESA Version 2
ging the default from CDF (800 bytes
blocks) to EDF (1K or 4K). I was just a young whippersnapper at the time and
didn't involve myself in the deliberations of the Elders.
A lot of memory cells have become non-functional in that amount of time. :-(
Alan Altmark
IBM
---
lock.
But you need to back up and look at your business requirements. FINRA, for
example, requires business systems to be within one second of UTC. (Certain
kinds of financial transactions have much tighter requirements.) Given the
time and effort you spent on fiddling with CLOCKxx, y
r.
Then if the client wants to reduce the price by redlining items, that's on
them, but I think IBM or the BP should be bringing a full function proposal.
Alan Altmark
IBM
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ciples of Operation), but I don't see any
facility indications for interpretive execution, the details of which haven't
been published since the 370-XA time frame.
Alan Altmark
IBM
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ponse to your e-mail, I re-read your original question, which isn't about
SIE, but about a STFLE response. z/VM does not enable the RRBM facility for
guests (STFLE bit 66 is OFF). You should receive an Operation Exceptio
n one or more LPARs,
sharing the machines with other zCloud customers.
See the link to the data sheet at
https://www.ibm.com/services/cloud/managed-infrastructure-as-a-service. You
could view it as a form of outsourcing
1, and 83. All
other subsystems have their own logging mechanism.
Alan Altmark
IBM
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s was an intentional change
to our mail rules by the CIO.
So any IBMer who replies directly rather than using the web interface will end
up with it in the Subject line by default.
And I'm guessing we're not the only ones.
Alan Altmark
IBM
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autoloader. This allows systems without DFSMS and
'modern' library controls to still be able to request a tape mount from the
emulated library.
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#x27;t online since they're part of a service
offering, not a product, per se. I would open a Case with GDPS to request
them.
Alan Altmark
IBM
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>But SHARED is also specified by CHPID.
>Are OSE devices also available in ZOS1 LPARs?
No. Your IOCP says that only ZOS2 has access:
> CHPID PCHID=191,PATH=(CSS(0),03),TYPE=OSE,SHARED,PARTITION=((ZOS2))
If you didn't specify PARTITION=((ZOS2)), then both LPARs would have access.
Ala
supposed to say "Unassigned" just like 0x0F and 0x10.
Please submit a Reader's Comment Form to request clarification.
Alan Altmark
IBM
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as the web client's id for the
purposes. (The ID exists in the local RACF database, but I don't want to
authenticate with it.)
Is this something better suited to Liberty/WAS?
Alan Altmark
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cal clock is left an exercise to
the vendor.
Alan Altmark
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ng more traction in the scientific community is to abandon
the leap second entirely.
Alan Altmark
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generate the correct civil time, but the observant person will discern that the
epoch has moved 37 seconds backward into December 31, 1899. (And with each
subsequent leap second, it moves backward an additional second.)
Alan Altmark
IBM
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TLS-enabled FTP. TLS ensures that the data is not altered in transmission, so
the MD5 is superfluous for that purpose.
Alan Altmark
IBM Lab Services
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ad VCNA or VTAM.
In any case, I quit getting phone calls from people. (VTAM no longer runs on
the system I did network management on, so it's no longer an issue for anyone
- esp. me!)
Alan Altmark
Senior Managing z/VM Consultant
IBM Syste
ted that the IODF in the virtual
machine was far larger than in the LPAR.
MVS is going to create a UCB for every device in the IODF, not just for devices
that are in the I/O configuration, and SQA isn't big enough to hold it all.
Either allocate more SQA or reduce
aracters, do TRUNC 72 # CL :72 # COVERLAY X # REPEAT n # TRUNC
71.
Naturally we all updated our profiles once 3270s showed up, so it turned into a
non-issue.
Alan Altmark
IBM
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EDIT.
For a more sophisticated version of that, have a look at the label SetView: in
https://www.vm.ibm.com/devpages/altmarka/profile.xedit
Alan Altmark
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was burned by that a couple of years ago when they changed one
of the other default behaviors in XEDIT to make life easier.
Alan Altmark
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progs wasting time trying to shoot a dump. That's what
they pay IBM to do and the sooner they get the dump to us, the sooner we can
fix the problem.
Alan Altmark
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uot; to the caller. How the caller treats a
deferral is up for grabs. If, like TSO, the caller has a secondary
authentication/authorization mechanism (e.g. SYS1.UADS), then all is not lost.
But if the app/subsystem is entirely dependent on the ESM, all security
decisions will [should] be &
ven while in ISPF or another
command environment". It's a very poorly-worded description.
To Gil's point: Can you issue "EXECIO" or "SUBCOM" from the TSO command line?
If not, it's not a TSO command - it's just part of the *REXX* TSO command
envi
nvironments outside of (and
much older than) REXX, such as the EXEC and EXEC2 languages or even an
assembler program. Still, there is no real requirement for a SUBCOM
environment be exactly the same as the interactive environment it represent.
The SUBCOM handler gets
gal to do so."I sometimes lose sight of the
audience. :-) :-)
Alan Altmark
IBM
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are
issued. It's up to the macro expansion provided by MVS and the registered
SUBCOM handlers (invoked by REXEXT) to interpret the command string in whatever
way is appropriate to the command handler.
Alan Altmark
IBM
-
lient (assuming you haven't turned it off with the "sendsite" command)
will provide or discover the LRECL and RECFM of the file automatically. See
the IP User's Guide for details.
Alan Altmark
Senior Managing z/VM
code in them
isn't a great idea.)
6. The z/VM SMEs hang out in the IBMVM mailing list at
https://listserv.uark.edu/scripts/wa-UARKEDU.exe?A0=IBMVM. Let's continue the
discussion there.
Alan Altmark, IBM
Senior Managing z/VM Consultant
-
ply breaks
lines at the linend character and passes them to CMS if they aren't recognized
(per SET IMPCPCMS). So what works in fullscreen CMS won't work the same way
in XEDIT.
Alan Altmark
z/VM Consultant
IBM Technology Services
the app or OS.
Alan Altmark
Senior Managing z/VM Consultant
IBM Technology Services
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cro)=(LIB(.), .))
That is, you are mapping a specific pattern to a specific set of MACLIBs.
My test program that has
#include "my.macro"
compiles just fine without any LSEARCH specification.
Alan Altmark
z/VM Consultant
IBM
---
differently with/without the OE option. All of this is
thoroughly documented in the XL C/C++ for z/VM: User's Guide. I've only
scratched the surface.
Alan Altmark
IBM
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Max R0 length: 57326
Max R1 length: 56664 (architected)
Unformatted device capacity: 84.1 MB
Formatted device capacity (4K blocks): 70.3 MB
Formatted device capacity (56664 block): 81.1 MB
Regards,
Alan Altmark
IBM z/VM Engineer and Consultant
---
onnect at the same time.
Those TLS handshakes are significantly accelerated by offloading the
asymmetric cryptography to the crypto cards where it runs in parallel to
whatever is happening on the CP.
Alan Altmark
IBM
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There is no formal description of the algorithm used to
generate this integer" and the term "MSU" is not in the Principles of Operation.
"Any similarity is purely coincidental."
Alan Altmark
IBM
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P, "Setting and Inspecting the Clock". There's a table
that I think you will find helpful.
Alan Altmark
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it.
Hi, Jim. I meant that if you want to really know what time it is, you can't
use STCKF.
Alan Altmark
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vendor storage specialist.
Sorry I can't give you more definitive information. I'll check with a storage
architect and see if I can get a better answer.
Alan Altmark
IBM
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On Fri, 26 Jul 2024 07:41:27 -0500, Alan Altmark
wrote:
>Sorry I can't give you more definitive information. I'll check with a storage
>architect and see if I can get a better answer.
The answer came back faster than I expected. No, you cannot connect different
vendors b
ORMATION (STHYI) instruction, represented by a STFLE bit, the IUCV
instruction (hi-order byte of Processor ID = FF) and different set of DIAGNOSE
subfunctions (again, from STIDP[0] = FF).
Alan Altmark
z/VM Consultant
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On Wed, 30 Dec 2015 17:08:26 -0600, Jerry Callen wrote:
>Bob Rogers (no longer at IBM...)
Bob rejoined IBM a while back, working in z/VM.
Alan Altmark
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till hoping that someone will reveal the existence of a document intended
>for compiler writers...
Folks who participate in PWD may have access to that kind of information -- I
don't know. If you participate in Linux GCC development
ded REFCODEs. These books and
the utilities all need that information in order to know what to do. If the
verification utility doesn't complete successfully, then there are FRUs that
have to be replaced.
Alan Altmark
IBM
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have been scanned in. It may have
already been done as a part of our efforts to support places like the Computer
History Museum.
Alan Altmark
IBM
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the instructions say.
Alan Altmark
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efines where the OPERATOR will be logged on.
Alan Altmark
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tion is for your fave FTP server to have an
interface on it with a VPN into the LAN segment used by the HMC & SEs.
Alan Altmark
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s of the windows. Unless you are logged into the device and can click
on HELP or the actual buttons, you're going to have problems. You can't
advise someone how to do it without actually doing it since you can't visualize
what's going on! (T
;Managed Infrastructure Services" and "Other". At some point IBM will
publish more details, I'm sure.
Alan Altmark
IBM Systems Lab Services
Senior Managing z/VM Consultant
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a different *timezone* in an LPAR, you use the OS's own timezone
support. While you CAN get the tz from the hardware as a default, you don't
have to.
Alan Altmark
IBM Lab Services
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information facility, you know you are in a virtual machine.
Alan Altmark, IBM
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operating systems you wish.
Whether you should build a business dependency on that choice is another matter
entirely.
And as a gentle reminder, I see that general support for z/OS 1.12 ends in
September of this year.
Regards,
Alan Altmark
IBM
but to IPL the installation media. (A power
outage isn't going to affect a tape that's not in a drive.)
The thing about recovery procedures is that you need to test them before you
need them!
Alan Altmark
IBM Lab Ser
On Thu, 8 May 2014 12:54:04 -0500, Alan Altmark wrote:
> If the IPLable utility tape was created on a labeled tape, then it isn't
> going to work
> and you have no choice but to IPL the installation media. (A power outage
> isn't
> going to affect a tape that's
t; continue to reside on ECKD. Fast-growth data
such as databases should be on native SCSI, not FBA simulation on SCSI.
Alan Altmark
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mmon frame of reference.
The TEXT setting, on the other hand, corresponds to a code page that I believe
was used by ATMS, and was not tied to the TN print train (code page 264). I
have never been able to ferret out the code page used by ATMS.
Alan Altmark
IBM
---
e been read, so
the record number is zero. You NOTEd the zero value and added 1. Then you
POINTed to 0x01, but that low-order byte isn't used, so you are effectively
pointing to record zero.When a zero is passed to the lower-level CMS
filesystem interfac
h Z=0, CMS decrements TTR by 1 and stores that as the 'last
read' value. When you POINT with Z=1, CMS stores TTR as you supply it. (You
guys made me find my BSAM test case, ca. 1992, and update it.)
Alan Altmark
IBM
-
On Wed, 8 Aug 2012 09:18:35 -0400, Shmuel Metz (Seymour J.)
wrote:
> >To increment the record number by one, add 256 to the "TTR".
>
>ITYM add 256 to the TTRz.
Yes, indeed.
Alan Altmark
IBM
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On Fri, 10 Aug 2012 09:49:19 -0500, Alan Altmark
wrote:
>When you POINT with Z=0, CMS decrements TTR by 1 and stores that as the 'last
>read' value. When you POINT
> with Z=1, CMS stores TTR as you supply it. (You guys made me find my BSAM
> test case, ca. 1992, and
On Fri, 19 Dec 2014 20:33:06 -0500, Mike Shaw wrote:
>Knowledge Center is IT from now on, boys and girls.
>
>We're not happy about it either.
There are a lot of bytes still to go under the bridge.
What has happened is some sort of culture shift in the way people (younger than
me) *want* to get
veral times over its life as the underlying chip design
changes.
Alan Altmark
IBM
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e to call it "microcode." The
joke's on us
If you try to create clear-cut definitions of the terms, you will be
frustrated. It's best to go read what Humpty Dumpty has to say to Alice about
the meaning of words. When I hear them, I wait for context to surface and
then j
ing about technology. In
fact, we sometime love it a bit too much, particularly when it's new and it
hasn't completed its evolutionary journey.
Alan Altmark
IBM
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ssues to look out for? Since it is a sandbox
env,
> there will not be much traffic over the CTC if that scenario were to
happen.
Yes, you can do that. For best results, make sure the IP addresses on the
CTC connection are in a separate /30 subnet.
Alan Altmark
Senior Managing z/VM and Linux Co
mean by "z/OS may not be far behind."?
The introduction of IBM Global Training Partners will provide clients with more
options and opportunities to receive IBM-authorized training.
Please watch the videos at http://www.ibm.com/training/us?lnk=ushpcs2
Alan Altmark
Sr. Managing z/
(a false positive) an event, it will never under-indicate an
event.
It would be unforgivable if the architects baked in
Alan Altmark
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s."
The Architects write the POO. They write what they mean and they mean what
they write. They have to, since it is the specification to which the Engineers
must conform. They do, on occasion, provide some guidance to the Engineers
that can help
among other things, "does not depend on
results or functions that are defined to be unpredictable or model-dependent or
are identified as undefined. This includes the requirement that the program
should not depend on the assignment o
unforgivable if the architects baked a
specific implementation into the architecture, as it would undermine a half
century of effort.
They are very experienced at knowing when to use a fine-point pen vs. a broad
brush.
Alan Altmark
IBM
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rom leaving 'debug builds' in
production code.
But over the decades I, too, have encountered instructions whose behavior I
found to be annoying or inconvenient.
Alan Altmark
IBM
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FICON
attachment (vs. FC), then you will need to have activated the FICON Attachment
feature on the controller and the usual FICON configuration tasks are needed.
In particular, it means you need to have used the SM to configure the FICON
ports on the controller.
Alan Altmark
IBM
f glass-house self-sufficiency for generations.
And the consultants have to scramble, too, since all the rules of thumb change.
Folks like to look for cheaper dasd, and I don't blame them, but I have to say
'be careful what you wish for.' :-)
Alan Altmark
IBM
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at router to allow
only outbound TCP connections from the SE, as the SE uses "passive" ftp. Of
course, if you have an application firewall, it will handle active and passive
ftp, opening the needed ports on demand, in the c
cement. As you say, it applies to all System z software delivery, not
just z/OS.
Alan Altmark
Senior Managing z/VM and Linux Consultant
IBM STG Lab Services
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On Mon, 11 Feb 2013 15:15:53 -0600, Alan Altmark
wrote:
> Unfortunately this information did not make it into the z/VM V6.3 Preview
> announcement. As you say,
> it applies to all System z software delivery, not just z/OS.
I realized that this could be misconstrued. While at some p
o you in the
configuration panels, not requiring you to do the device number <-> UA
translations yourself.
Alan Altmark
z/VM Consultant
IBM Lab Services
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