Re: Carlos Ordonez - RIP

[Dave Jones]

I am very sorry to hear this, Mike. My condolences to his friends and
family.

DJ

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   DAVE JONES IBM 2023 Z CHAMPION [1]
Managing Director for IBM z and Linux on z Support
++1 281.578.7544 (Cell)
Web: www.itconline.com [2]
18502 Purdy Ct. Houston, TX  77084  USA

On 2023-06-14 8:16, Michael MacIsaac wrote:

> My good buddy Carlos passed away. Those of you who knew him, no doubt knew
> what a great guy he was. We will miss him.  May he rest in peace.
>
> https://www.tributearchive.com/obituaries/28143502/carlos-a-ordonez/poughkeepsie/new-york/william-g-miller-and-son-funeral-home-inc
>
> --
> -Mike MacIsaac
>
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Re: Edit grub from 3270 console

[Dave Jones]

So is 'ned' available anyplace? 

Happy Cinco de Mayo, too! 

DJ

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   DAVE JONES IBM 2023 Z CHAMPION [1]  
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++1 281.578.7544 (Cell) 
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On 2023-05-04 17:23, Rick Troth wrote:

> 'ned', which was truly an excellent editor, many XEDIT-like features.
> 
> Ironically, UTSGlobal contributed the 3270 full screen driver to Linux. I 
> guess they thought they'd be able to get revenue from the editor?
> 
> I was told that 'ned' on UTS would detect 3270 or ASCII line and accommodate 
> either. I never used it on an ASCII line, so this is a second hand report.
> But 'ned' on a 3270 was really fantastic.
> 
> -- R; <><
> 
> On 5/4/23 19:55, Mark Post wrote: I'm pretty sure they're asking about the 
> ability of using grub itself to change things, when the grub menu is 
> displayed. If so, then there is supposed to be a way to do it, but I never 
> really dug into it well enough to figure it out properly. There are a couple 
> of hints given on the screen about which keys to use, etc., but after that I 
> wasn't initially able to get any further, and had to move on to other tasks.
> 
> If they're not talking about that, and are asking about using some form of 
> editor to modify the config file itself, then you're correct. I really wish 
> the old UTS editor that was made to work with 3270/3215 terminals had been 
> open sourced before the company went under, but that never happened.
> 
> Mark Post
> 
> -Original Message-
> From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU]On Behalf Of
> Rich Smrcina
> Sent: Thursday, May 04, 2023 5:55 PM
> To:LINUX-390@VM.MARIST.EDU
> Subject: Re: Edit grub from 3270 console
> 
> Victor,
> 
> The only options that I can think of are ed and sed. Your
> Unix people should know how to use them.
> 
> Rich Smrcina
> Sr. Systems Engineer
> 
> Velocity Software Inc.
> Main: (650) 964-8867
> Main: (877) 964-8867
> r...@velocitysoftware.com  <mailto:r...@velocitysoftware.com>
> 
> On May 4, 2023, at 4:04 PM, Victor Echavarry 
>   wrote: Hello
> 
> Some of our Unix people asked is there a way to add or modify the grub file 
> at start up from a 3270 screen? Is there
> are instructions for this? Regards,
> 
> Víctor Echavarry
> System Programmer
> EVERTEC LLC
> 
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How to force a Linux kernel dump....?

[Dave Jones]

I have a client with an unresponsive zLinux guest. The client wants to
(somehow) force a kernel dump; but does not have access to either the 370
console or an SSH logon prompt.
What can he do here?
I have suggested doing a FOR zlinux CMD VMDUMP   but that's not a
kernel dump.
Any ideas?
Many thanks.

Dave Jones

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Re: ClefOS installation instructions.....

[Dave Jones]

Preaching to the choir, gentlemen :-)

DJ

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   DAVE JONES IBM Z CHAMPION [3]
Managing Director for zSystems and Linux on z Support
++1 281.578.7544 (Cell)
Web: www.itconline.com [2]
18502 Purdy Ct. Houston, TX  77084  USA

On 2023-01-02 10:19, Rick Troth wrote:

> I was going to suggest ZNETBOOT to Dave.
> Installing from the network is what that's all about: fetch directly from the 
> URL to z/VM spool space. ZNETBOOT stacks the kernel, initrd, and parm file, 
> then IPLs.
>
> -- R; <><
>
> On 1/2/23 04:56, Neale Ferguson wrote:
>
>> Further. You can install from network rather than using the iso. If you do 
>> use iso just download it  to a locally accessible host, mount it, make it 
>> available via NFS or HTTP(S), and boot from reader using the files in 
>> images/. The network install should also work using 
>> https://download.sinenomine.net/7
>>
>> Sent from my Galaxy
>>
>>  Original message 
>> From: Dave Jones 
>> Date: 1/2/23 03:05 (GMT+10:00)
>> To: LINUX-390@VM.MARIST.EDU
>> Subject: [LINUX-390] ClefOS installation instructions.
>>
>> Happy New Year, ya'll.
>>
>> I'm thinking about installing ClefOS 7.9 here...I have downloaded both
>> the 79os.iso and 79Update.iso files from the SNA web site and I am now
>> wondering how to proceed. Does anyone have any suggestions/helpful hints
>> on how to do the basic install?
>>
>> Many thanks, too.
>>
>> DJ
>>
>> --
>> BEST REGARDS
>>
>> DAVE JONES IBM Z CHAMPION [1]
>> Managing Director for zSystems and Linux on z Support
>> ++1 281.578.7544 (Cell)
>> Web: www.itconline.com [1]<http://www.itconline.com> [2 [2]]
>> 18502 Purdy Ct. Houston, TX  77084  USA
>>
>> Links:
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ClefOS installation instructions.....

[Dave Jones]

Happy New Year, ya'll.

I'm thinking about installing ClefOS 7.9 here...I have downloaded both
the 79os.iso and 79Update.iso files from the SNA web site and I am now
wondering how to proceed. Does anyone have any suggestions/helpful hints
on how to do the basic install?

Many thanks, too.

DJ

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++1 281.578.7544 (Cell)
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Fred Brooks has passed away...

[Dave Jones]

Sad news indeed. Condolences to his family.

https://en.wikipedia.org/wiki/Fred_Brooks

DJ

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DISLIN 11.5.0 ported to zLinux

[Dave Jones]

An early Christmas present.the DISLIN 11.5.0 graphics library has
been ported to Linux running as a guest of z/VM. From its web site
(https://www.dislin.de/index.html):

"DISLIN is a high-level plotting library for displaying data as curves,
[1] polar plots, [2] bar graphs, [3] pie charts, [4] 3D-color plots, [5]
surfaces, [6] contours [7] and maps [8].

DISLIN is intended to be a powerful and easy to use software package for
scientists and programmers. There are only a few graphics routines with
a short parameter list needed to display the desired graphical output. A
large variety of parameter setting routines can then be called to create
individually customized graphics."

I find it very useful for displaying z/VM performance data without the
need for shipping the data off-site.

Enjoy!

DJ

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++1 281.578.7544 (Cell)
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Links:
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[2] https://www.dislin.de/exa_polar.html
[3] https://www.dislin.de/exa_bars.html
[4] https://www.dislin.de/exa_pies.html
[5] https://www.dislin.de/exa_clr.html
[6] https://www.dislin.de/exa_surf.html
[7] https://www.dislin.de/exa_cont.html
[8] https://www.dislin.de/exa_map.html
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Re: vmur reader uevent patch upstream

[Dave Jones]

++1 for this update. Many thanks.

DJ

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   DAVE JONES IBM Z CHAMPION [5]
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++1 281.578.7544 (Cell)
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On 10.17.2022 7:48 AM, Peter Oberparleiter wrote:

> Dear all,
>
> based on discussions on this mailing list [1 [1]], and a request that
> reached me via the OpenMainframeProject mailing list [2 [2]], I've
> implemented the functionality of generating a kernel uevent that can be
> used as a trigger e.g. for processing newly arrived VM reader files in
> Linux.
>
> This function has now been added into the upstream Linux kernel source
> repository as commits [3 [3]][4 [4]]
>
> bf18140d3054 ("s390/vmur: generate uevent on unsolicited device end")
> f3e59ff348c0 ("s390/vmur: remove unnecessary BUG statement")
>
> and is queued for integration into Linux kernel v6.1. From there it will
> likely be picked up by future Linux distribution versions that will be
> based on that kernel level. Note that there are currently no plans by
> IBM to back-port this feature to older distribution versions.
>
> For your reference, here's the associated commit message containing some
> usage details. Please let me know if you have additional questions, or
> comments. Thanks!
>
> ==
> s390/vmur: generate uevent on unsolicited device end
>
> When a traditional channel-attached device transitions from not-ready to
> ready state, an unsolicited DEVICE END I/O interrupt is raised. This
> happens for example when a new file arrives in the z/VM virtual reader
> device.
>
> Change the Linux kernel to generate a change uevent when such an
> interrupt occurs for any online unit record devices supported by the
> vmur driver. This can be useful to automatically trigger processing of
> files as they arrive in the reader device.
>
> A sample udev rule for running a program when this event occurs looks as
> follows:
>
> ENV{DRIVER}=="vmur", ACTION=="change", ENV{EVENT}=="unsol_de", \
> RUN{program}="/path/to/program"
>
> The rule can be tested using the following steps:
>
> 1. Set reader device online (assuming default reader device number 000c)
>
> $ chzdev -ea 0.0.000c
>
> 2. Force a ready-state transition using z/VM's READY CP command
>
> $ vmcp ready 000c
> ==
>
> Regards,
> Peter
>
> [1] http://www2.marist.edu/htbin/wlvtype?LINUX-VM.97664
> [2] https://lists.openmainframeproject.org/g/wg-linux-distros/message/59
> [3]
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/s390/char/vmur.c?id=bf18140d30541c2c1e5c0f57879634f3d0d04912
> [4]
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/s390/char/vmur.c?id=f3e59ff348c077a6afd4edb23d7e69e9cba62fdc
>
> --
> Peter Oberparleiter
> Linux on IBM Z Development - IBM Germany R
>
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[3]
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[4]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/s390/char/vmur.c?id=f3e59ff348c077a6afd4edb23d7e69e9cba62fdc
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Re: Can zLinux detect when files arrive in the virtual reader?

[Dave Jones]

I have an (old) IBM SHARE presentation here on how to set up and use
SMSG on Linux I can send you. I think it is kind of a pain to set up but
it does work.

Another approach would be to have a simple TCPIP server running on
Linux.you put the information about the RDR file you just sent to
Linux into a packet, and send that packet to the TCPIP server. The
server then takes the packet and gets the spool id, file name, etc. and
then decides how to handle the RDR file that just arrived. No polling
involved.

Good luck.

DJ

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   DAVE JONES IBM Z CHAMPION [1]
Managing Director for zSystems Support, zLinux, and Cloud
++1 281.578.7544 (Cell)
Web: www.itconline.com [2]
18502 Purdy Ct. Houston, TX  77084  USA

On 08.31.2022 11:46 PM, Donald Russell wrote:

> Thanks David. Where can I find how to set up the "smsg catcher" in Linux?
> Is it part of the vm manager suite? Extra cost thingy?
>
> Does it support vmcf send/reply as well?
>
> Cheers,
> Don
>
> On Wed, Aug 31, 2022 at 17:39 David Kreuter 
> wrote:
>
> Use a cms wakeup machine running vmutil that receives a reader file. When
> the reader pops wakeup sends a smsg to the Linux machine and transfers the
> file. Linux has a smsg interface to trap the smsg
> Stick the rdr file Information in the smsg
> I have the smsg Linux driver running to receive alerts from perfsvm and
> log them
> A modern shop would look into IBM's vm manager suite
> David
> 
> From: Linux on 390 Port  on behalf of Alan
> Altmark 
> Sent: Wednesday, August 31, 2022 5:35:19 PM
> To: LINUX-390@VM.MARIST.EDU 
> Subject: Re: Can zLinux detect when files arrive in the virtual reader?
>
> When a traditional channel-attached device transitions from not-ready to
> ready, an unsolicited DEVICE END I/O interrupt is raised. (UE indicates EOF
> on the reader.)  Similar for tape and 3270s.
>
> But I don't think Linux generates a UDEV event for unsolicited DE.
>
> Regards,
> Alan
>
> Alan Altmark
> Senior Managing z/VM Consultant
> IBM Technology Services
> 1 607 321 7556  (Mobile)
> alan_altm...@us.ibm.com
>
> -Original Message-
> From: Linux on 390 Port  On Behalf Of Donald
> Russell
> Sent: Wednesday, August 31, 2022 4:47 PM
> To: LINUX-390@VM.MARIST.EDU
> Subject: [EXTERNAL] [LINUX-390] Can zLinux detect when files arrive in the 
> virtual reader?
>
> Short of having some Linux script querying the virtual reader, is there a way 
> Linux can detect when a file arrives and invoke a script?
>
> Sort of like incrond for file system events.
>
> The idea is from cms I could send a file to the Linux virtual reader and then 
> Linux would process with vmur commands.
>
> How does CMS WAKE-UP do it? I assume when a. We file arrives there's a.
> Unsolicited DE (Ready) interrupt that Linux currently ignores.
>
> Can I configure something with udev rules?
>
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Re: Fwd: Neale Ferguson's fsiucv package

[Dave Jones]

Thanks, Jack.

DJ

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   DAVE JONES   IBM Z CHAMPION [1]
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++1 281.578.7544 (Cell)
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On 07.13.2022 7:37 AM, Jack Woehr wrote:

> On 7/13/22 8:17 AM, Dave Jones wrote:
>
>> I'm using Ubuntu 20.04 Linux here and there is no "/var/log/messages"
>> file to be found, sorry.
>
> /var/log/syslog on Ubuntu
>
> --
> Jack Woehr   # Zen is a finger pointing at the moon.
> IBM Champion 2021-2022   # Some want to see the moon.
> http://www.softwoehr.com # Some want to discuss the finger.
>
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Re: Fwd: Neale Ferguson's fsiucv package

[Dave Jones]

Thanks Frank. A bit frustrating that the different distros don't put the
information in the same places.

DJ

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   DAVE JONES   IBM CHAMPION [3]
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On 07.13.2022 7:21 AM, Frank Heimes wrote:

> On Ubuntu look at:
> /var/log/syslog
>
> On Wed, Jul 13, 2022 at 4:18 PM Dave Jones  wrote:
>
> Hi, Neale.
>
> I'm using Ubuntu 20.04 Linux here and there is no "/var/log/messages"
> file to be found, sorry.
>
> I do feel badly about causing you all this extra work, as well, so don't
> feel you have to get this to work just you me. I have found an alternate
> method of "talking" IUCV from CMS to z/Linux that works exactly as I
> want it to, using the AF_IUCV family of socket calls. I've written a
> simple server that runs on Linux that can be driven by a CMS application
> using the RXIUCVFN Rexx function package, which is what I wanted to do
> in the first place.
>
> I'll be posting the code and a short "how-to" on GitHub when I can.
>
> Take care.
>
> DJ
>
> ---
> BEST REGARDS
>
> DAVE JONES   IBM CHAMPION [1]
> Managing Director for zSystems Support, zLinux, and Cloud
> ++1 281.578.7544 (Cell)
> Web: www.itconline.com [1] [2 [2]]
> 18502 Purdy Ct. Houston, TX  77084  USA
>
> On 07.12.2022 10:48 PM, Neale Ferguson wrote:
>
> I built on RHEL 8 and, apart from tainting the kernel, I was able load/unload 
> the kernel module without a problem. I did get:
> depmod: ERROR: Bad version passed fsiucv
>
> DJ - is there a message in /var/log/messages when you get the permission 
> denied message? You may see a connect message and an IPRCODE.
> Neale Ferguson
>
> On 7/13/22, 12:02, "Neale Ferguson"  wrote:
>
> Would you send your fix(es) and I'll give it a go here.
>
> Neale Ferguson
>
> On 7/13/22, 02:03, "Linux on 390 Port on behalf of Mark Post" < 
> LINUX-390@VM.MARIST.EDU on behalf of mp...@suse.com> wrote:
> Just FYI to Neale and the list... The changes I made to the kernel
> module allowed it to be compiled, but it doesn't appear to work, and if
> you then try to unload the kernel module, you get a kernel panic and the
> system reboots (if your have reboot on panic enabled).
>
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Re: Fwd: Neale Ferguson's fsiucv package

[Dave Jones]

Hi, Neale.

I'm using Ubuntu 20.04 Linux here and there is no "/var/log/messages"
file to be found, sorry.

I do feel badly about causing you all this extra work, as well, so don't
feel you have to get this to work just you me. I have found an alternate
method of "talking" IUCV from CMS to z/Linux that works exactly as I
want it to, using the AF_IUCV family of socket calls. I've written a
simple server that runs on Linux that can be driven by a CMS application
using the RXIUCVFN Rexx function package, which is what I wanted to do
in the first place.

I'll be posting the code and a short "how-to" on GitHub when I can.

Take care.

DJ

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On 07.12.2022 10:48 PM, Neale Ferguson wrote:

> I built on RHEL 8 and, apart from tainting the kernel, I was able load/unload 
> the kernel module without a problem. I did get:
>
> depmod: ERROR: Bad version passed fsiucv
>
> DJ - is there a message in /var/log/messages when you get the permission 
> denied message? You may see a connect message and an IPRCODE.
>
> Neale Ferguson
>
> On 7/13/22, 12:02, "Neale Ferguson"  wrote:
>
> Would you send your fix(es) and I'll give it a go here.
>
> Neale Ferguson
>
> On 7/13/22, 02:03, "Linux on 390 Port on behalf of Mark Post" 
>  wrote:
>
> Just FYI to Neale and the list... The changes I made to the kernel
> module allowed it to be compiled, but it doesn't appear to work, and if
> you then try to unload the kernel module, you get a kernel panic and the
> system reboots (if your have reboot on panic enabled).
>
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Re: Neale Ferguson's fsiucv package

[Dave Jones]

Hello, all.

Well the patches seem to work. They were applied with no errors and the
fsiucv driver was successfully build using the "make ..." command. After
the "make" and "make tools" completed with no errors, I installed the
drive driver using the "insmod fsiucv.ko" command and a "lsmod" command
shows this:

Module Size Used by
fsiucv 20480 0
pkey 32768 0
zcrypt 106496 1 pkey

..

Now on to trying to use fsiucv. Since the "make tools" did not create
the "ricleint" application, I just compiled it by hand:

 gcc riclient.c

which completed with no errors, yielding the usual "a.out" file.

I have the RISERVER rexx code running on MAINT here, so I did the
following:

echo "maint" > /sys/devices/iucv/iucv0/target_user

echo "zVM72" > /sys/devices/iucv/iucv0/target_node

echo "RISERVER" > /sys/devices/iucv/iucv0/program_name

All the other entries under ".../iucv/iucv0" were left as is.

Running the a.out files yields this:

./a.out
open: Permission denied

All of the required IUCV settings for both guests have been applied as
well.

I'd like to buy a clue here, please. :-)

DJ

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On 07.07.2022 6:05 PM, Mark Post wrote:

> On 7/7/22 20:12, Neale Ferguson wrote:
>
>> Is it built against my git hub code? If so, generate a PR and I'll merge if 
>> it works.
>
> Yes, it was.  I was going to wait until I heard back from Dave before
> sending you my changes. If you'd prefer I do it now, instead, I'll do that.
>
> Mark Post
>
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Re: Neale Ferguson's fsiucv package

[Dave Jones]

Yup, sure can. Many thanks, Mark.

DJ

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On 07.07.2022 10:47 AM, Mark Post wrote:

> On 7/7/22 11:58, Dave Jones wrote:
>
>> Mark, yes that is my experience, too. It's well above my limited C
>> programming skill set.
>>
>> I'll let the list know if anything changes here.
>
> Well, I may have just figured it out. Maybe. But, I don't really have
> the knowledge to test it. If I send you a patch, you can try to build it
> on your system and see what blows up.
>
> Mark Post
>
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Re: Neale Ferguson's fsiucv package

[Dave Jones]

Mark, yes that is my experience, too. It's well above my limited C
programming skill set.

I'll let the list know if anything changes here.

DJ

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On 07.07.2022 8:51 AM, Mark Post wrote:

> On 7/7/22 11:36, Dave Jones wrote:
>
>> it's right here:
>>
>> https://github.com/nealef/fsiucv
>
> I'm pretty sure I tried to build that a year ago. It failed with all
> sorts of problems with kernel include files having changed. I talked to
> Neale about it, but I don't think he had much spare time to work on it.
> Not being conversant with kernel programming, I had to leave it at that.
>
> Mark Post
>
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Re: Neale Ferguson's fsiucv package

[Dave Jones]

Mark,

it's right here:

https://github.com/nealef/fsiucv

Thanks.

DJ

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On 07.07.2022 8:33 AM, Mark Post wrote:

> On 7/7/22 10:01, Dave Jones wrote:
>
>> Has anyone ported Neale's fsiucv package to any other zLinux distro
>> other than SNA's ClefOS? I'm lazy and I would like to use it on Red Hat
>> and SuSE.
>
> I don't even see it on their download server. Where have you seen it?
>
> Mark Post
>
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Neale Ferguson's fsiucv package

[Dave Jones]

Hello all.

Has anyone ported Neale's fsiucv package to any other zLinux distro
other than SNA's ClefOS? I'm lazy and I would like to use it on Red Hat
and SuSE.

Thanks, all.

DJ

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an interesting video about the new z16

[Dave Jones]

I think that is is an interesting take.

https://www.youtube.com/watch?v=ZDtaanCENbcHave fun.
DJ

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a new book "Introduction to Enterprise Systems"

[Dave Jones]

Our very own Drs. David Boyes and Cameron Seay have contributed to a new
book about mainframes titled "Introduction to Enterprise Systems". It
looks very interesting, especially for someone trying to learn about
what the modern mainframe can do, and how it got here.

You can read more about it and order a copy here:

https://he.kendallhunt.com/product/introduction-enterprise-systems-0

Take care.

DJ

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from NPR: Sea shanties written for the digital age

[Dave Jones]

An interesting listen, I think.

https://www.npr.org/2022/01/22/1074964815/opinion-sea-shanties-written-for-the-digital-age
 [1]
Kind of reminds me of the sing-alongs we had a SHARE
DJ

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Today's funny....

[Dave Jones]

Because in these times we all need a good laugh.

Four engineers get into a car. The car won't start.
The mechanical engineer says: "It's a broken starter"
The electrical engineer says: "Dead battery"
The chemical engineer says: "Impurities in the gasoline"
The Windows IT engineer says: "Hey guys, I have an idea, how about we
all get out of the car and get back in"

DJ

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Re: Redbooks Rumor

[Dave Jones]

If true, that would be one of the stupidest things IBM has ever done, 
imho.

DJ

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On 10.28.2021 7:02 PM, Neale Ferguson wrote:

I am hearing strong rumors that IBM is about to commit the type of
corporate facepalm that is the stuff for future textbooks. Apparently
Redbooks are no longer going to be a thing and the organization
disbanded. If there’s one thing that has differentiated IBM in the
mainframe space has been the quality of its documentation and, in
particular, the type of HOW-TO information contained within Redbooks
and Redpieces. These documents turn a “that’d be nice to do” into a
proof-of-concept and finally into production. In doing so, they must
be responsible for millions or billions of dollar in revenue to IBM.

Many of the topics of Redbooks cover are complex and even
intimidating. They provide a step-by-step approach to learning and
implementing using a group of people actually doing what they’re
writing about. This is invaluable.

I hope these rumors are untrue but if not I think we should all be
shouting from the roof until someone with some sense realizes how
shortsighted this decision is.

Neale


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Re: SHARE inn Dallas...

[Dave Jones]

Thanks, Ed. But there is no mention at all of Linux on Z, or z/VM, like
there is for MVS and z/OS.
DJ

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On 10.20.2021 11:23 AM, Ed Jaffe wrote:

On 10/20/2021 11:02 AM, Dave Jones wrote:

It has come to my attention, via my usually reliable sources, that the
upcoming SHARE in Dallas (March, 2022) will have a very limited (or
no)
LVM content.


I pulled this off the CFP:

SHARE Dallas education will offer sessions within 5 topics:

DevOps: Application Architecture, Languages, Open Source, and Tools
IT Operations: Performance, storage (hardware and software) and
automated operations
MVS: Systems programming skills, focusing on the installation,
maintenance, management, performance, and exploitation of z/OS. What's
new and coming in the software and hardware
Professional Development: Development of leadership, personal, and
career building skills
Security: Enterprise-wide security management including compliance and
auditability

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SHARE inn Dallas...

[Dave Jones]

Greetings, all.

It has come to my attention, via my usually reliable sources, that the
upcoming SHARE in Dallas (March, 2022) will have a very limited (or no)
LVM content.

Make your plans accordingly.

Take care.

DJ

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Re: Recovery assistance.

[Dave Jones]

And a "how-to" guide is here:

http://www.vmworkshop.org/docs/2014/24dH6VdP.pdf

Enjoy.

DJ

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INFORMATION TECHNOLOGY COMPANY [1]

On 07.22.2021 9:19 AM, Alan Altmark wrote:

> On Thursday, 07/22/2021 at 03:34 GMT, "van Sleeuwen, Berry"
>  wrote:
>
>> Just thinking out loud here. Indeed having a maintenance machine would
> be nice,
>
>> but in this case we need the functionality, so any guest might be able
> to do
>
>> that task.
>
> Consider setting up your guests to be accessible via the Linux IUCV
> terminal server.  In a pinch you could also use the integrated ASCII
> console on the HMC and ATTACH SYSASCII to the Linux guest.
>
> Alan Altmark
>
> Senior Managing z/VM and Linux Consultant
> IBM Systems Lab Services
> IBM Z Delivery Practice
> ibm.com/systems/services/labservices
> office: 607.429.3323
> mobile; 607.321.7556
> alan_altm...@us.ibm.com
> IBM Endicott
>
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Re: z/Linux and VM RDR files

[Dave Jones]

This begs the questioncould a WAKEUP type function be written for
zLinux when it is running as a guest of z/VM?
DJ

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On 05.21.2021 8:58 AM, Alan Altmark wrote:

On Friday, 05/21/2021 at 12:44 GMT, Ingo Adlung 
wrote:

I don't recall how an unsolicited DE is processed today, but I don't

feel a

udev event would be the adequate action. Perhaps it could become an
informational log entry that could be filtered ...


There's already code in vmur to handle unsolicited DE (it explicitly
ignores it).  I'm not sure how add_uevent_var() works and how drivers
can
change the value of variable with kobject_uevent( KOBJ_CHANGE ), but
maybe
vmur could add "NEW_SPOOL_FILE" when it gets loaded, and change it's
status when the unsolicited DE arrives.  (Also triggered by CP READY
00C
command._

Udev appears to be designed to handle device status changes, not just
hotplug events.

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
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mobile; 607.321.7556
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Re: z/Linux and VM RDR files

[Dave Jones]

But I don't know if the Linux device drivers will generate UDEV events
based on it.  It would be nice if they did.

They don't, unfortunately.
DJ

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On 05.20.2021 2:32 PM, Alan Altmark wrote:

On Thursday, 05/20/2021 at 07:37 GMT, Dave Jones 
wrote:

How can I get automatically notified in a z/Linux guest (in this case
Ubuntu 20.04) when a rdr file arrives for it?


(Didn't we have a conversation about this here a few weeks/months ago?)

Aside from an IMSG, the reader will get an unsolicited DEVICE-END
interrupt indicating a transition from NOT READY to READY.  This is the
same kind of interrupt that indicates
- a tape has been loaded in a drive and has reached load point,
- a disk pack has spun up to speed after being mounted (think 2314)
- you have powered on your 3270.

Bottom line, the device is ready to send or receive data.

But I don't know if the Linux device drivers will generate UDEV events
based on it.  It would be nice if they did.

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott

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Re: z/Linux and VM RDR files

[Dave Jones]

Rick, I can? Pray tell, how? If I was doing this on CMS I would just use
WAKEUP (or something like it) to run something when a RDR arrived.
Many thanks.
DJ

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On 05.20.2021 1:23 PM, Rick Troth wrote:

IMSGs
But you can trap those too.

On Thu, May 20, 2021, 16:11 Mark Post  wrote:


On 5/20/21 4:06 PM, Mark Post wrote:
> If the message you get from CP is an SMSG, then you can have udev rules
> that would get triggered to check to see what was in the SMSG, and act
> on it as appropriate.
>
> I don't know if those *are* SMSGs or not, but if they are, this is the
> approach I would take.

Rats, I have to take that back. The smsgiucv_app driver only sees
SMSGs
that start with the characters "APP," so this won't work for virtual
reader events. Sorry for the noise.


Mark Post

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z/Linux and VM RDR files

[Dave Jones]

Hello, all.
How can I get automatically notified in a z/Linux guest (in this case
Ubuntu 20.04) when a rdr file arrives for it?
Many thanks.
DJ

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Re: SYSASCII Console for Linux images

[Dave Jones]

This is a good idea, imho. Right now, as I understand things, the main
driver of the z architecture growth is Linux based workloads, so the
more we ("we" == IBM) can make the z platform behave like the other
platforms, the easier it will be for IBM to sell z boxes into
distributed-oriented sites. Robert's pints "a" and "b" address this
explicitly, and it's just another step in the evolution of the
mainframe.

Maybe we could try to hold a BoF about this topic at the upcoming VM
Workshop? Robert, are you planning on attending?
Take care.
DJ

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On 03.02.2021 3:25 PM, Robert J Brenneman wrote:

I thought it would be cool if the hardware platform could emulate a set
of
Keyboard/Video/Mouse devices via pretend PCI devices presented into the
LPAR that hook into like a VNC / RemoteDesktop / SPICE software service
that runs on the SE or HMC.

If you virtualize it like pretend PCI devices ( similar to what KVM
does
internally for guests ) then Linux doesn't need any new drivers if you
emulate things that the kernel already knows how to talk to: Cirrus
Logic
VGA card, USB Keyboard & Mouse , possibly USB  CDROM too and you can
pass
through an ISO mount from your remote desktop client.

This would do a bunch of things:
a)  Installation now works like on every other Linux platform : remote
into
the LPAR / Guest using the same tools as every other platform ( VNC ,
SPICE, RemoteDesktop )  and you don't have to muck about with creating
a
custom parmfile at all - if we can remote media mount a .iso through
the
client to present as a USB attached DVD then it appears as local
install
media and you don't need a working IP stack for the installer anymore.
b)  Fixing broken systems now works like every other Linux platform :
remote into the VNC / SPICE / RemoteDesktop link and fix the network
using
whatever suits your fancy. Full on X11 GUI if you really want to - go
for
it.
c) Hypervisor agnostic : since its basically fake PCI devices you
generate
as many as needed per LPAR and either use them directly from the LPAR
or
attach them to a specific guest. You would have to have some kind of
mapping of "PCI device group 1 is VNC desktop :1 " , and you would have
to
manage that from the HMC similar to what we do with OSA ICC profiles -
but
thats a solvable problem.

Nobody else I talked to thought it was cool though... :(


But if youuu guys asked for it as an official Requirement ... maybe
you
guys could make it cool ? ?


...

Just thinkin.

I'm gonna go have dinner now.




On Tue, Mar 2, 2021 at 3:57 PM Dave Jones  wrote:


Thinking about this a little more, I think what would be nice to have
is
something along the lines of the OSA-ICC, which presents locally
attached 3270 device to the O/S, but is reachable via TCP/IP.

We could call it the OSA-ASC and it would present a locally attached
VT220 to either Linux running native in an LPAR or to Linux running as
a
guest of z/VM, also reachable via TCP/IP.

No need to have access to the HMC and it's Integrated ASCII console.

DJ

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On 03.01.2021 2:00 PM, Mark Post wrote:
> On 3/1/21 3:49 PM, Dave Jones wrote:
>> Have you considered using the IBM Terminal Server for
>> zLinux?
>> The Terminal Server is part of the s390-tools package and
>> permits normal access to other zLinux guests running
>> on the same z/VM system, even if they are not
>> connected to a working TCP/IP network. This permits
>> the use of common Linux tools like vi, Emacs, and
>> nano, to be used even in the event of a network
>> failure.
>
> The caveat being that this only works after the kernel boots up to the
> point where the hvc? console(s) are available. For any problems that
> are
> really early in the boot process, this won't suffice. Once you get past
> that point, things do indeed look a lot more like "normal" to the
> typical Linux system administrator.
>
>
> Mark Post
>
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Re: SYSASCII Console for Linux images

[Dave Jones]

Thinking about this a little more, I think what would be nice to have is
something along the lines of the OSA-ICC, which presents locally
attached 3270 device to the O/S, but is reachable via TCP/IP.

We could call it the OSA-ASC and it would present a locally attached
VT220 to either Linux running native in an LPAR or to Linux running as a
guest of z/VM, also reachable via TCP/IP.

No need to have access to the HMC and it's Integrated ASCII console.

DJ

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On 03.01.2021 2:00 PM, Mark Post wrote:

On 3/1/21 3:49 PM, Dave Jones wrote:

Have you considered using the IBM Terminal Server for
zLinux?
The Terminal Server is part of the s390-tools package and
permits normal access to other zLinux guests running
on the same z/VM system, even if they are not
connected to a working TCP/IP network. This permits
the use of common Linux tools like vi, Emacs, and
nano, to be used even in the event of a network
failure.


The caveat being that this only works after the kernel boots up to the
point where the hvc? console(s) are available. For any problems that
are
really early in the boot process, this won't suffice. Once you get past
that point, things do indeed look a lot more like "normal" to the
typical Linux system administrator.


Mark Post

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Re: SYSASCII Console for Linux images

[Dave Jones]

I wonder how hard it would be for z/VM to emulate, or virtualize, a
VT220 type terminal?
DJ

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On 03.01.2021 2:00 PM, Mark Post wrote:

On 3/1/21 3:49 PM, Dave Jones wrote:

Have you considered using the IBM Terminal Server for
zLinux?
The Terminal Server is part of the s390-tools package and
permits normal access to other zLinux guests running
on the same z/VM system, even if they are not
connected to a working TCP/IP network. This permits
the use of common Linux tools like vi, Emacs, and
nano, to be used even in the event of a network
failure.


The caveat being that this only works after the kernel boots up to the
point where the hvc? console(s) are available. For any problems that
are
really early in the boot process, this won't suffice. Once you get past
that point, things do indeed look a lot more like "normal" to the
typical Linux system administrator.


Mark Post

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Re: SYSASCII Console for Linux images

[Dave Jones]

Have you considered using the IBM Terminal Server for
zLinux?
The Terminal Server is part of the s390-tools package and
permits normal access to other zLinux guests running
on the same z/VM system, even if they are not
connected to a working TCP/IP network. This permits
the use of common Linux tools like vi, Emacs, and
nano, to be used even in the event of a network
failure.

DJ

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On 03.01.2021 12:26 PM, Davis, Larry (National VM Capability) wrote:

What are people doing when the local Linux people are wanting ASCII
Consoles available for  performing reboots or problem resolution

I know I can attach the SYSASCII (HMC ASCII vt220 console) to a Linux
image

Does the Linux image need to include "ttys1" in the /etc/zipl.conf
file for RHEL 7.5 and above?
console=ttyS1 console=ttyS0

We tested attaching it to a Running Linux but the device never really
worked when attached, we probably missed something

Any Suggestions on using this properly?




Larry Davis
Senior z/VM systems Architect, Enterprise Services
T +1.813.394.4240
DXC Technology dxc.technology



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Re: CP overhead of using FCP attached SCSI SAN

[Dave Jones]

No offense taking, Rob! :-)
We now have another clue, this time from the console log. This error
keeps recurring:

[82053.035436] User process fault: interruption code 0x60010 in
nmon_mainframe_6
[82053.035448] failing address: 3FFFD379000
[82053.035453] CPU: 24 PID: 17149 Comm: nmon_mainframe_ Kdump: loaded
Not tainte
[82053.035456] task: 0041402d8000 ti: 0042b55d8000 task.ti:
0042b55d
[82053.035459] User PSW : 070520018000 80007114 (0x80007114)
[82053.035477] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 EA:
User GPRS: 441c 0073e750 00670680
00077000
[82053.035484] afe8da70 afe89b90 80067a50 000
[82053.035488] 01f9 03fffcbc1440 00035430 000
[82053.035492] 01fc 800282b0 0672 000
[82053.035505] User Code: 80007106: eb210003000d sllg %r2,%r1,
8000710c: b9080012 agr %r1,%r2
#80007110: 41717000 la %r7,0(%r1,%r7)

80007114: e31071a4 lg %r1,416(%r7)

8000711a: ec1300442065 clgrj %r1,%r3,2,800071a2
80007120: b9e91013 sgrk %r1,%r3,%r1
80007124: e32071a80004 lg %r2,424(%r7)
8000712a: e33091a80004 lg %r3,424(%r9)
[82053.035558] Last Breaking-Event-Address:
[82053.035560] <8000707e> 0x8000707e

So handling this approximately 1K times could drive the %steal up, I
think.
Thanks again.
DJ
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On 11.05.2020 12:48 AM, Rob van der Heij wrote:

On Wed, 4 Nov 2020 at 20:06, Rob van der Heij 
wrote:



On Wed, 4 Nov 2020 at 19:30, Dave Jones  wrote

What is the CP overhead of managing this?  The one Linux guest that is

running here reports a %steal of 15-17%, which I think is a bit high.




At the risk of teaching granny... the most common cause for reported
high
"steal percentage" in Linux is not CP overhead on I/O, but contention
for
CPU resources on z/VM and PR/SM level.
And when you see high %steal combined with %idle in the guest, then it
may
well be due to an application causing a high amount of polling (and
lowering the number of virtual CPUs closer to the allocated capacity
may be
helpful).

Rob

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CP overhead of using FCP attached SCSI SAN

[Dave Jones]

Hello, all.

I have a site that is using SCSI SAN (a V7000) to hold all z/VM
storagethe system z/VM and Linux software is installed on emulated
FBA dasd, and the Oracle database is stored on 360 or so SCSI disks,
attached via FCP.

What is the CP overhead of managing this?  The one Linux guest that is
running here reports a %steal of 15-17%, which I think is a bit high.
Could this be configured better?
Thanks, appreciate it.
DJ

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Re: smsgiucv_app

[Dave Jones]

Thank you very much for sharing this, Tore. It was very helpful.

DJ

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On 09.01.2020 12:12 AM, Tore Agblad wrote:
From some manual or redbook, don't remember which one, we got the below 
code.

Works perfectly. Have used it for at least 10 years now.
You will need to code your own script /usr/local/bin/vit_check_smsg.sh
to decode whatever text-command you sent and take proper action 

BR /Tore

#
# Sample udev rules for processing CP special messages.
# Rules for unique incoming iucv messages
# This file should be installed in /etc/udev/rules.d
#
# syntax from z/VM:  smsg zlin1002 APP user some_command_text 
extra_parms

#
#
DEVPATH!="*/smsgiucv_app", GOTO="smsgiucv_app_end"
# -- Rules for CP messages go here ---­


# --- Initialization --­
# load vmcp
SUBSYSTEM=="module", ACTION=="add", RUN+="/sbin/modprobe --quiet vmcp"
# load vmur and set the virtual punch device online
SUBSYSTEM=="module", ACTION=="add", RUN+="/sbin/modprobe --quiet vmur"
SUBSYSTEM=="module", ACTION=="add", RUN+="/sbin/chccwdev -e d"


# --- Special rules available for particular z/VM user IDs --­
ENV{SMSG_SENDER}!="MAINT|OPERATOR|ZLINADM", 
GOTO="smsgiucv_app_continue"

# DMESG: punch dmesg output to sender
ACTION=="change", ENV{SMSG_TEXT}=="DMESG", \
  ENV{PATH}="/bin:/sbin:/usr/bin:/usr/sbin", \
  RUN+="/bin/bash -c 'dmesg |fold -s -w 74 |vmur punch -r -t -N 
LINUX.DMESG -u $

GOTO="smsgiucv_app_end"

LABEL="smsgiucv_app_continue"

# --- Rules for all senders ---­

# Any cmd, will be checked by /usr/local/bin/vit_check_smsg.sh
ACTION=="change", \
  ENV{PATH}="/bin:/sbin:/usr/bin:/usr/sbin", \
  PROGRAM=="/usr/local/bin/vit_check_smsg.sh $env{SMSG_SENDER} 
$env{SMSG_TEXT}",
  RUN+="/sbin/vmcp msg $env{SMSG_SENDER} âd has arrived, will check it 
nowâ


LABEL="smsgiucv_app_end"



Tore Agblad
Group Technical Specialist
Senior Infrastructure Architect and System Programmer – Mainframe zOpen
HCL Technologies Ltd.
Gunnar Engellaus väg 3, 418 78 Gothenburg, Sweden
www.hcltech.com
www.hcl.com


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-Original Message-
From: Linux on 390 Port  On Behalf Of Dave 
Jones

Sent: Wednesday, August 19, 2020 9:38 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: smsgiucv_app

[CAUTION: This Email is from outside the Organization. Unless you
trust the sender, Don’t click links or open attachments as it may be a
Phishing email, which can steal your Information and compromise your
Computer.]

Hi, Mark.
Yes, I have Richard's presentation here but I couldn't quite follow
how to code the udev rules to accomplish what I wanted to. Jame's
example was the key
Stay safe.
DJ

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On 08.19.2020 12:05 PM, Mark Post wrote:

On 8/19/20 8:19 AM, Dave Jones wrote:


Before I go down this rabbit hole, does anyone here have a working
example of the smsgiucv_app that I could look at? I don't seem to
understand how to code the udev rules correctly.


Richard Lewis gave a session on this several times at SHARE entitled
"If I Send a Special Message to Linux on System z Will it Answer?
Automating
Linux on z/VM"

It should be in the proceedings from SHARE 119, 120, 121, and 122. If
not, I can send you a copy.


Mark Post

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Re: smsgiucv_app

[Dave Jones]

Hi, Mark.
Yes, I have Richard's presentation here but I couldn't quite follow how
to code the udev rules to accomplish what I wanted to. Jame's example
was the key
Stay safe.
DJ

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On 08.19.2020 12:05 PM, Mark Post wrote:

On 8/19/20 8:19 AM, Dave Jones wrote:


Before I go down this rabbit hole, does anyone here have a working
example of the smsgiucv_app that I could look at? I don't seem to
understand how to code the udev rules correctly.


Richard Lewis gave a session on this several times at SHARE entitled
"If
I Send a Special Message to Linux on System z Will it Answer?
Automating
Linux on z/VM"

It should be in the proceedings from SHARE 119, 120, 121, and 122. If
not, I can send you a copy.


Mark Post

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Re: IUCV 2WAY missing from AF_IUCV in zLinux?

[Dave Jones]

Alan Altmark said:

"But imagine what you could do if an AF_INET/AF_INET6 provider could be
configured to simply acts as a shim layer, redirecting all AF_INET and
AF_INET6 socket calls to the VM TCPIP machine.  Linux's own TCP/IP stack
would be effectively inop. That would enable almost any Linux network
app
to work on behalf of VM.  The possibilities are tantalizing."

+++1 for that idea.
DJ

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On 08.18.2020 10:44 PM, Alan Altmark wrote:

On Tuesday, 08/18/2020 at 01:47 GMT, Ursula Braun

wrote:


Probably not: Either there is a good idea why to include

message_send2way into

the standard socket interface AF_IUCV, or there is a new kernel module

for

communication with the TCPIP service, built on top of net/iucv/iucv.c

similar

to other specific IUCV exploiters like drivers/s390/char/vmlogrdr.c,
drivers/s390/net/netiucv.c, drivers/s390/net/smsgiucv.c,

drivers/tty/hvc/...

But imagine what you could do if an AF_INET/AF_INET6 provider could be
configured to simply acts as a shim layer, redirecting all AF_INET and
AF_INET6 socket calls to the VM TCPIP machine.  Linux's own TCP/IP
stack
would be effectively inop. That would enable almost any Linux network
app
to work on behalf of VM.  The possibilities are tantalizing.

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott


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Re: smsgiucv_app

[Dave Jones]

Thank you very much, James. I now see where I made my mistake(s) in
coding the rule.
Stay safe.
DJ

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On 08.19.2020 5:28 AM, James Vincent wrote:

Yep!  Best thing to do is start simple:


DEVPATH!="*/smsgiucv_app", GOTO="smsgiucv_app_end"
SUBSYSTEM=="module", ACTION=="add", RUN+="/sbin/vmcp msg JAMES udev
rules
loaded"
ENV{SMSG_SENDER}!="JAMES", GOTO="smsgiucv_app_end"

ACTION=="change", \
  PROGRAM=="/usr/local/bin/myscript $env{SMSG_SENDER} $env{SMSG_TEXT}",
\
  RUN+="/sbin/vmcp -k MSG $env{SMSG_SENDER} $result"

LABEL="smsgiucv_app_end"


This would be in a rule file in /etc/udev/rules.d/  Breaking this
example
down, it sends "JAMES" a message letting me know that the smsgiucv_app
is
loaded up and ready. The ENV(SMSG_SENDER) makes sure only my userid
"JAMES"
is allowed to use this rule, otherwise it bails out.

Then the ACTION calls a script evaluating the sent info and sends the
response back.

-- *James Vincent*


On Wed, Aug 19, 2020 at 8:19 AM Dave Jones 
wrote:


Hello, all.

Before I go down this rabbit hole, does anyone here have a working
example of the smsgiucv_app that I could look at? I don't seem to
understand how to code the udev rules correctly.
Many thanks and stay safe.
DJ

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smsgiucv_app

[Dave Jones]

Hello, all.

Before I go down this rabbit hole, does anyone here have a working
example of the smsgiucv_app that I could look at? I don't seem to
understand how to code the udev rules correctly.
Many thanks and stay safe.
DJ

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Re: CLEFOS 7.8 question....

[Dave Jones]

Thanks, Neale. Now go get some sleep.
DJ

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On 07.17.2020 8:30 AM, Neale Ferguson wrote:

Https://download.sinenomine.net/clefos/7/images (or maybe without the
images - it's 1.30am here and I'm a little tired).


 Original message 
From: Dave Jones 
Date: 7/18/20 01:25 (GMT+10:00)
To: LINUX-390@VM.MARIST.EDU
Subject: [LINUX-390] CLEFOS 7.8 question

HI, all.
I am attempting to install Clefos 7.8 here via the network. What's the
URL of the "installation source"?
Thanks and stay safe.
DJ

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CLEFOS 7.8 question....

[Dave Jones]

HI, all.
I am attempting to install Clefos 7.8 here via the network. What's the
URL of the "installation source"?
Thanks and stay safe.
DJ

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Re: UCD and z/VM agent

[Dave Jones]

I don't know UCD well enough to say, John.
DJ

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On 07.15.2020 7:05 AM, John Mertic wrote:

Is there any overlap with this and Feilong?

https://github.com/openmainframeproject/python-zvm-sdk

Thank you,

John Mertic
Director of Program Management - Linux Foundation
ASWF, ODPi, and Open Mainframe Project
jmer...@linuxfoundation.org
+1 234-738-4571
Schedule time with me at https://cal.mixmax.com/johnmertic
<https://calendly.com/jmertic>


On Wed, Jul 15, 2020 at 9:31 AM Dave Jones  
wrote:



(Cross posted to both VM and Linux on s390 lists)

Regis Colin of the Royal Bank of Scotland has posted a RFE asking for 
a

UCD native agent for z/VM. In this case, UCD means the IBM UrbanCode™
Deploy and it is used to standardize and simplify the process of
deploying software components to each environment in your development
cycle.

You can review the RFE here:
http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe_ID=143800

and if it looks useful for your site, you can vote for it.
DJ


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UCD and z/VM agent

[Dave Jones]

(Cross posted to both VM and Linux on s390 lists)

Regis Colin of the Royal Bank of Scotland has posted a RFE asking for a 
UCD native agent for z/VM. In this case, UCD means the IBM UrbanCode™ 
Deploy and it is used to standardize and simplify the process of 
deploying software components to each environment in your development 
cycle.


You can review the RFE here:
http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe_ID=143800

and if it looks useful for your site, you can vote for it.
DJ


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Re: Open Source, drug dealers, and time travel

[Dave Jones]

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On 07.06.2020 1:03 PM, Phil Smith III wrote:

Time Travel Resistant Cryptography

https://www.bluetoad.com/publication/?m=1336

=666070=articleBrowser_id=3713491



Discuss.



Sounds reasonable to me, Phil.
DJ

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Re: Development Environment for s390x

[Dave Jones]

It was an M3K, Mark. Interesting times, then.
DJ

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On 06.01.2020 9:19 AM, Mark Post wrote:

On 6/1/20 10:46 AM, Robert J Brenneman wrote:

I think I remember Neale booted up windows something or
other under qemu on linux on s390 ... a while ago.


Looking at the mailing list archives, the first mention I could find
for
this was from David Boyes on February 21, 2000:
"... I have successfully (albeit slowly) booted NT Server 4.x (Intel)
under bochs on L/390, and successfully run MS Exchange for Intel
straight off the BackOffice CDs for a trivial number of users. "

Then, on September 11, 2002, Adam Thornton posted this link to an image
of Windows NT running on a Linux guest on z/VM:
http://www.fsf.net/~adam/NT-on-390-desktop.png

When the snapshot was taken, they were using Dave Jones' Multiprise. I
can't recall if it was a Multiprise 2000 or 3000.


Mark Post

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Fwd: Future-Watch: Big changes to login and /home directory handling

[Dave Jones]

This might be of some interest to the folks that follow this list.

Scheduled for release this year. If adopted, it has the potential for
good and ill. /etc/passwd and /etc/shadow going away, replaced with
encrypted JSON, and other changes.

https://www.techrepublic.com/article/linux-home-directory-management-is-about-to-undergo-major-change/


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Re: Devuan

[Dave Jones]

Gentoo?
DJ

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On 03.08.2020 10:14 AM, David L. Craig wrote:

Does anyone have Devuan running on Z?  Are there any Z distros
besides Rick Troth's NORD that do not require systemd?
--

May the LORD God bless you exceedingly abundantly!

Dave_Craig__
"So the universe is not quite as you thought it was.
 You'd better rearrange your beliefs, then.
 Because you certainly can't rearrange the universe."
__--from_Nightfall_by_Asimov/Silverberg_

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Re: Cloud using zlinux

[Dave Jones]

And then there is this option as well:

tessia - task execution supporter and system installation assistant
A tool to automate and simplify the installation/configuration/testing 
of Linux systems running on the IBM Z platform.

https://gitlab.com/tessia-project/tessia

Plus sometime next week IBM/RedHat will be announcing the availability 
of Red Hat OpenShift on IBM Z, too.

DJ

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On 03.01.2020 5:24 AM, Rich Smrcina wrote:

Peter,

Take a look at our zPro:
https://www.velocitysoftware.com/zpro.html


You can also take it for a ride. Sign up for an ID on our demo system
and you can see how it works.
https://demo.velocitysoftware.com/zpro/


If you have any further questions, don’t hesitate to let us know.

Rich Smrcina
Sr. Systems Engineer

Velocity Software Inc.
Main: (650) 964-8867
Main: (877) 964-8867
r...@velocitysoftware.com 



On Mar 1, 2020, at 1:02 AM, Peter  wrote:

Hello

I am trying to understand how cloud is configured using zlinux.

Any manuals or white papers which can help me to read and understand 
in

detail ?

Peter

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Pioneering black mathematician Katherine Johnson has died

[Dave Jones]

Crap.
https://www.chron.com/news/science/article/NASA-Mathematician-portrayed-in-Hidden-Figures-15079663.php

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Sudo Flaw Lets Linux Users Run Commands As Root Even When They're Restricted

[Dave Jones]

Might be of interest to folks here..
https://thehackernews.com/2019/10/linux-sudo-run-as-root-flaw.html
DJ

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Re: Redhat Linux vs OMVS or zOS

[Dave Jones]

This IBM Redbook might be of some use to you...

https://obahy.files.wordpress.com/2012/11/zvm-and-linux-operations.pdf

DJ
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On 09.18.2019 10:27 AM, Jake Anderson wrote:

Hello,

So far I have worked on zOS, OMVS, stuff.

Here in Linux (redhat), the mount points , dasda,dasda1,dasdb,dasdb1
and
swap disk. Is there any document which can explain me with comparing or
equivalent to zOS or OMVS ?

For example in zOS we call address space and in zVM it's guest.

Generally a document which explains the redhat Linux stuff to a zOS
system
programmer.

Is there any ?

Jake

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Re: NSS not possible in SLES 12

[Dave Jones]

++1
You guys are going backwards
DJ

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On 09.04.2019 12:03 PM, Rick Troth wrote:

On 9/4/19 11:39 AM, Christian Borntraeger wrote:

On 04.09.19 16:41, Scott Rohling wrote:

Let's start with who or what said it wasn't possible ?

[...]

Just to be sure, by "nss" I meant Named Saved System.

[...]
what is the reason for nss not being possible with SLES from 
version 12?

[...]

The Linux kernel now makes use of self-patching in several places and 
several core
features would no longer work without those.  To make NSS possible, 
the NSS would
need to have a copy-on-write semantics instead of being read-only. 
With global patching
we would copy almost everything over time making the feature not 
useful.


So the feature was not only removed in SLES but will go away in other 
future distros

and it is no longer part of the upstream kernel.



What's this? a little uptime funk? That's cool as long as it _doesn't
break other things_.   

Seriously? You whacked NSS for live patching? Don't! (Too late.)
https://www.youtube.com/watch?v=SYRlTISvjww    


Bad enough all the PUTTERING around in userland, even INIT, but now the
kernel's borken too. Babies and bath-water both banished. Bummer!


Hey, hey, hey, HAY ... Stop! ... wait a minute ... I'm a fan of 
advances

(hallelujah!), but not at the cost of flexibility.

I believe y'all killed XIP too, right? That was brilliant. (NOT)


Not all the world's containers (or whatever shiny thing). Don't believe
me? Just watch: I'll introduce you to a container escaper and 
kubernetes

breaker.


-- R; <><







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OT: Codebreaker Alan Turing to be face of new British banknote

[Dave Jones]

I thought this interesting:
https://www.chron.com/business/technology/article/Codebreaker-Alan-Turing-to-be-face-of-new-British-14095643.php#photo-17856190
DJ

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Re: From Reddit

[Dave Jones]

OK, that's just weird, Phil.  :-)
DJ

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On 06.10.2019 8:38 AM, Phil Smith III wrote:

There's a subreddit, r/fakealbumcovers, which I find strangely
compelling. Liked this one:

https://i.redd.it/d4a7rqol5b331.jpg

(list rejected jpg as attachment, so here's the link)


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Re: Google Chrome on Red Hat?

[Dave Jones]

Thanks, Mark. That's pretty much the feedback I've gotten from others,
as well. No problem, though.
DJ

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On 05.31.2019 12:46 PM, Mark Post wrote:

On 5/28/19 1:21 PM, Dave Jones wrote:

I'd like to run Google Chrome on Red Hat z/Liunx...does anyone know
where a pre-build binary might be found?


I just tried to build Chromium on the openSUSE Build Service. It failed
due to what seems like in-line assembler code in the source. I suspect
that there's not a pre-built binary out there, unless someone has gone
to a fair amount of trouble to get it to build. That no one has spoken
up in this mailing list would indicate that none of the usual suspects
have made that effort.


Mark Post

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Google Chrome on Red Hat?

[Dave Jones]

Hello, all.

I'd like to run Google Chrome on Red Hat z/Liunx...does anyone know
where a pre-build binary might be found?
Thanks in advance.
DJ

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Re: Martin Schwidefsky

[Dave Jones]

That is sad news indeed. Like Rick, I had met him a few times and found 
him friendly and approachable.

A great loss.
DJ

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On 05.21.2019 8:20 AM, Rick Troth wrote:
This is a painful loss. I met Martin on several occasions. He was 
bright

and articulate and eminently approachable.

-- R; <><

On Tue, May 21, 2019, 8:47 AM PHILIP TULLY  
wrote:



To all,

Today I learned that Martin Schwidefsky has died in a parachute
accident.(see attached url for translated news story).

Martin was a deeply technical person, with Linux kernel expertise.  He
presented at many technical conferences and was always willing to
discuss and dig into the Linux puzzles.

I have worked on multiple technical issues with Martin, and while he
could overwhelm my linux technical knowledge easily, he was always
willing to help me learn.

Martin’s intelligence, wit and good nature will be missed.

Regards
Phil Tully




https://translate.google.com/translate?hl==de=en=https%3A%2F%2Fwww.focus.de%2Fpanorama%2Fwelt%2Fdrama-in-baden-wuerttemberg-fallschirmspringer-schlagen-auf-boden-auf-und-sterben-ursache-ist-klar_id_10728579.html

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Re: Examples of tape access

[Dave Jones]

For the current version of Bacula, it's in the 
"/bacula-9.4.1/examples/vm/" directory.

DJ

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Cloud
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INFORMATION TECHNOLOGY COMPANY

On 01.23.2019 6:32 PM, David Boyes wrote:

There's also a simple open source CMS-based server in the Bacula
source tree (www.bacula.org) that handles mount/dismount and tape
attaches runnable from Linux guests. Might work for your purposes;
Adam and I wrote it ages back for a purpose like this. I believe it's
in a directory called 'extras/VM'.





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Linux systemd affected by memory corruption vulnerabilities, no patches yet

[Dave Jones]

Yet another reason to dislike systemd
https://www.bleepingcomputer.com/news/security/linux-systemd-affected-by-memory-corruption-vulnerabilities-no-patches-yet/

Don't know yet if this effects Linux on z.
DJ

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Interesting IEEE article on tape....

[Dave Jones]

https://spectrum.ieee.org/computing/hardware/why-the-future-of-data-storage-is-still-magnetic-tape


enjoy.

DJ

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Re: xymon on zLinux anyone?

[Dave Jones]

Hi, all.

Where might one find these z/VM and z/OS clients for xymon?
Thanks and have a good one.
DJ
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On 07.24.2018 6:59 AM, Frank M. Ramaekers wrote:

> Yes, thanks Martha, I'm aware of xymon.  I currently have the server running 
> on an old CentOS 5 and need to migrated it to a zLinux (ClefOS).   I was 
> hoping there was a RPM for it.
>
> Frank M. Ramaekers Jr.
>
> -Original Message-
> From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Martha 
> McConaghy
> Sent: Tuesday, July 24, 2018 8:38 AM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: xymon on zLinux anyone?
>
> We use Xymon a great deal, it monitors all of our servers and network 
> equipment (several thousand items).  We run the server on zLinux (SLES) and 
> the client runs just about anywhere.  There are even clients for z/VM and 
> z/OS (thanks Rich!).  Its all PhP based, so I don't think an RPM is 
> necessary.  (I haven't done the install in a long time, someone else in our 
> group does that.)  Its definitely not specific to any version of Linux.  As 
> long as you have Apache and PhP installed, it should run on Clef.
>
> Martha
>
> On 7/24/2018 8:43 AM, Frank M. Ramaekers wrote:
>
>> Anyone doing xymon on zLinux?   Know where a RPM for ClefOS might be found?
>>
>> Frank M. Ramaekers Jr. | Systems Programmer | Information Technology | 
>> American Income Life Insurance Company | 254-761-6649 (732-6649)
>>
>> --
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>> is solely for the use of the intended recipient. If you are not the intended 
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> --
> Martha McConaghy
> Marist: System Architect/Technical Lead
> SHARE: Director of Conference Operations
> Marist College IT
> Poughkeepsie, NY 12601
>
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Re: Linux native on Z

[Dave Jones]

Hi, Dick.

All three of the major z/Linux distros (Red Hat, SUSE and Ubuntu) can
run native on the bare medal.

DJ

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On 07.06.2018 6:19 AM, Dick Anderson wrote:

> Does anyone know of a Linux distribution that can run stand-alone in an
> LPAR? (Without z/VM)
>
> ---
> Dick Anderson
> Anderson Consulting Services
>
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Re: RedHat/ClefOS configuration file

[Dave Jones]

Frank, you can find that information in Part III of the Red Hat
"Installation Guide" that can be found here:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/index


DJ

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On 05.22.2018 7:42 AM, Frank M. Ramaekers wrote:

> I'm following in the IBM Redbook "The Virtualization Cookbook for IBM z 
> Systems Volume 2: Red Hat Enterprise Linux 7.1 Servers", and I'm at step 6:
>
> 6. Edit the GENERIC PRM file by adding the correct parameters and system 
> information as shown in the following example:
> ==> xedit GENERIC PRM a
> ro ramdisk_size=4 cio_ignore=all,!condev
> ip=9.12.7.96::9.12.4.1:20:vmlnx2-1.itso.ibm.com:enccw0.0.0600:none
> rd.znet=qeth,0.0.0600,0.0.0601,0.0.0602,layer2=1
> nameserver=9.12.6.7 nameserver=9.12.6.6
> inst.repo=ftp://lydiap:new2day@9.60.87.87//home/lydiap/linux/rhel71 [1]
> rd.dasd=0.0.0100 rd.dasd=0.0.0200
> vnc vncpassword=12345678
>
> Where do I find out what the various operands are for each keyword 
> (especially the ip=)? I'm assuming the ip= is:
>
> 1) Server being installed IP address
>
> 2) Unknown
>
> 3) Gateway
>
> 4) hostname
>
> 5) OSA address
>
> 6) Unknown (none)
>
> I think I have everything else.
>
> inst.repo=protocol://password:userid@hostname//directory/to/images
>
> TIA,
> Frank M. Ramaekers Jr. | Systems Programmer | Information Technology | 
> American Income Life Insurance Company | 254-761-6649 (732-6649)
>
> --
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> http://wiki.linuxvm.org/ [3]


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Re: Linux "sleep" command not waking up under high CPU utilization

[Dave Jones]

We're just beginning this process, Christian. I'll let the group know
what we find out.

DJ

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On 04.19.2018 8:35 AM, Christian Borntraeger wrote:

> On 04/19/2018 04:56 PM, Dave Jones wrote:
>
>> Thanks to all who responded to my query. At least we now know why the 
>> problem is occurring, and we will try some internal z/linux tuning.
>
> Anything useful that can be shared with the list?
>
> --
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Re: Linux "sleep" command not waking up under high CPU utilization

[Dave Jones]

Thanks to all who responded to my query. At least we now know why the
problem is occurring, and we will try some internal z/linux tuning.

DJ

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On 04.18.2018 1:16 PM, John Campbell wrote:

> "This should not happen"... Never confuse theory with practice.
>
> In Software development, theory and practice appear identical. (BT,DT)
>
> In Systems Integration and Application Production Support you quickly learn
> that theory and practice are seldom within the same galaxy much less the
> same solar system. (BT,DT)
>
> I've done enough problem determination within BOTH environments...
>
> (chuckles)
>
> (Draws on memory)
>
> Running an IBM labspace I had three AIX servers for supporting testing of
> an application that required SNA support. I also owned the delegated DNS
> subdomain so it was up to me to recommend names. One server handled
> functional testing, the second was for system testing and the final one for
> "user" testing. I named them flog, flail and flaunt. (The SNA gateway was
> named "phlegm", BTW, instead of "snaat".)
>
> In various places, beyond this, I have learned that "UAT" seems to stand
> for "User Avoided Testing".
>
> I've also worked w/ Tandem guys who throw around claims like 5 nines...
> and had the systems _I_ supported insulted as 9 fives servers.
>
> (shrugs)
>
> So I have a LOT of practice learning how systems DO NOT WORK AS EXPECTED.
>
> To paraphrase Patton's Law for this milieu... "No Plan Survives Contact
> With Reality".
>
> -soup
>
> On Wed, Apr 18, 2018 at 3:01 PM, Christian Borntraeger <
> borntrae...@de.ibm.com> wrote:
> On 04/18/2018 03:36 PM, Dave Jones wrote: Hello, gang. I have a very simple 
> bash script that runs a trivial data collection task, and then does a Linux 
> "sleep im" to wait a minute before running the data collection task again. 
> Under very high CPU loads (> 90%) I have noticed that the "sleep" command 
> does not seem to wake up after one minute but instead wakes up 15 to 20 
> minutes later. This is on a Red Hat 6.9 guest running under z/VM 6.4 on a z12 
> box. I would like to buy a clue here if I could. This should not happen, even 
> under load. Is this really the sleep that does not wakeup or is maybe the 
> following stuff not getting access to the data? Have you tried with "set -x" 
> in the bash script to see what commands bash is executing? 
> -- For 
> LINUX-390 subscribe / signoff / archive access instructions, send email to 
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--
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com
MacOS X proved it was easier to make Unix user-friendly than to fix
Windows
"It doesn't matter how well-crafted a system is to eliminate errors;
Regardless
 of any and all checks and balances in place, all systems will fail
because,
 somewhere, there is meat in the loop." - me

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Re: Linux "sleep" command not waking up under high CPU utilization

[Dave Jones]

> If in a virtualized instance...
> https://www.youtube.com/watch?v=__n5Bgxx-68

 [4]Very well played, Sir! remarkably funny and one of my favorites,
too.
DJ [4]

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On 04.18.2018 7:10 AM, John Campbell wrote:

> Buy a clue? That can be expensive depending upon how many vowels are
> necessary. :-)
>
> Look, the sleep call is awkward to begin with... and that's within a C
> program! (Since perl uses sleep() it can work more-or-less the same way.)
> A sleep(1) call will vary, for instance. Depending upon the system using a
> nap(ms) call has its own complications.
>
> A "sleep 1m" (or, the way I code the command, "sleep 60" since the default
> granularity is in seconds) includes a fork()+exec() call and then passing,
> on completion, notifying the parent process it can now proceed.
>
> In a very busy system, the fork()/exec() to LAUNCH the sleep command may be
> delayed. (Personally, when working within a system that is loaded down, I
> prefer to code a perl script, just to cut down on the fork()/exec() rate.)
> So, the need to execute fork() to get a child process launched-- which
> starts out as a copy of the existing shell-- can require resources that are
> in short supply EVEN WHEN the sleep command renders a teeny process,
> memory-wise, so, when the system is loaded down, forking can be impacted
> (RAM, CPU, etc) while the exec() call, itself, starts a process with a very
> minimal page set and lets page faults load the rest of it. (And, just as a
> reminder, the fork() call means the impure "data" and "stack" segments have
> to be allocated and copied.)
>
> So the system is loaded down.
>
> If this is a virtual instance, however, you may want to investigate whether
> the instance is being impacted by OTHER instances where resources are
> over-committed. Other instances can't be seen, howsomever, so finding out
> if some other instance is stealing your cycles (or putting your instance
> into paging space) can be harder to detect. The usual performance
> monitoring tools don't work "well" when CPU and RAM are overcommitted.
>
> YMMV.
>
> If you are resident in an LPAR you can use internal performance tools: Look
> at the top command's output. Run vmstat or even sar. Consider what your
> system is doing.
>
> If in a virtualized instance...
> https://www.youtube.com/watch?v=__n5Bgxx-68 [4]
>
> Finally, while a process is sleeping, it can be pushed out of RAM and then
> waking up means you'll have a whole buncha page faults as it tries to get
> running again. A virtual instance can have DOUBLE page faults both within
> the instance which cause a page fault the hypervisor has to address.
>
> If you are running an "important" set of processes within a virtual
> instance (shakes head).
>
> -soup
>
> On Wed, Apr 18, 2018 at 9:36 AM, Dave Jones <djo...@itconline.com> wrote:
>
>> Hello, gang. I have a very simple bash script that runs a trivial data 
>> collection task, and then does a Linux "sleep im" to wait a minute before 
>> running the data collection task again. Under very high CPU loads (> 90%) I 
>> have noticed that the "sleep" command does not seem to wake up after one 
>> minute but instead wakes up 15 to 20 minutes later. This is on a Red Hat 6.9 
>> guest running under z/VM 6.4 on a z12 box. I would like to buy a clue here 
>> if I could. Thanks. DJ -- DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS 
>> SERVICES | z/VM, Linux, and Cloud 703.237.7370 (Office) | 281.578.7544 
>> (CELL) INFORMATION TECHNOLOGY COMPANY [1 [1]] Links: -- [1] 
>> http://www.itconline.com/ [1] 
>> -- For 
>> LINUX-390 subscribe / signoff / archive access instructions, send email to 
>> lists...@vm.marist.edu with the message: INFO LINUX-390 or visit 
>> http://www.marist.edu/htbin/wlvindex?LINUX-390 [2]
-- For more 
information on Linux on System z, visit http://wiki.linuxvm.org/ [3]
>
> --
> John R. Campbell Speaker to Machines souperb at gmail dot
> com
> MacOS X proved it was easier to make Unix user-friendly than to fix Windows
> "It doesn't matter how well-crafted a system is to eliminate errors;
> Regardless
> of any and all checks and balances in place, all systems will fail because,
> somewhere, there is meat in the loop." - me
>
> --
> For LINUX-390 subscri

Linux "sleep" command not waking up under high CPU utilization

[Dave Jones]

Hello, gang.

I have a very simple bash script that runs a trivial data collection
task, and then does a Linux "sleep im" to wait a minute before running
the data collection task again. Under very high CPU loads (> 90%) I have
noticed that the "sleep" command does not seem to wake up after one
minute but instead wakes up 15 to 20 minutes later. This is on a Red Hat
6.9 guest running under z/VM 6.4 on a z12 box.

I would like to buy a clue here if I could.

Thanks.

DJ

--

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Cloud
 703.237.7370 (Office) | 281.578.7544 (CELL)

INFORMATION TECHNOLOGY COMPANY [1]


Links:
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Re: RHEL and HMC load from FTP

[Dave Jones]

Yes it certainly could be a firewall issue, Munif.

DJ

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On 03.23.2018 8:06 AM, munif sadek wrote:

> Thanks Alan / Steffen
>
> I have tried all combinations including /software/RHEL/ and still no Joy.
> Its not only this Directory but for any directory, my IP trace shows
>
> Req: NLST /software/RHEL/.
> Rsp: 550 No data sets found.
>
> FTP ERROR 550 could be Permission Denied or No such file or folder, I
> do not have any message in my zOS FTPSERVER Log. Thinking of starting
> FTP server trace.
>
> Could it be because our HMC is in Management layer and sits behind
> firewall while zOS is in different network.
>
> regards Munif
>
> On Fri, Mar 23, 2018 at 9:51 PM, Alan Altmark 
> wrote:
> On Friday, 03/23/2018 at 11:20 GMT, Steffen Maier  
> wrote: HMC expects the directory, which contains some generic.ins, as path; 
> not the .ins file itself as path. It does search the .ins file within the 
> given path itself internally. You are right, Steffen, so the directory 
> specification should be just /software/RHEL/. The HMC will return a list of 
> all .ins files it finds in the specified directory, along with the 
> descriptive data from inside each .ins file. Alan Altmark Senior Managing 
> z/VM and Linux Consultant IBM Systems Lab Services IBM Z Delivery Practice 
> ibm.com/systems/services/labservices office: 607.429.3323 mobile; 
> 607.321.7556 alan_altm...@us.ibm.com IBM Endicott 
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Fwd: [Linux_adult_swim] The Linux Foundat ion Announces an Open Source Reference Hypervisor Project Designed for IoT Device

[Dave Jones]

 

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INFORMATION TECHNOLOGY COMPANY [1]

 Original Message  

SUBJECT:
[Linux_adult_swim] The Linux Foundation Announces an Open Source
Reference Hypervisor Project Designed for IoT Device

DATE:
03.13.2018 8:43 AM

FROM:
Kevin Cole 

TO:
Adult Swim , HacDC Public
Discussion 

​https://www.prnewswire.com/news-releases/the-linux-foundation-announces-an-open-source-reference-hypervisor-project-designed-for-iot-device-development-300612829.html
[3] 

prnewswire.com [3] 

THE LINUX FOUNDATION ANNOUNCES AN OPEN SOURCE REFERENCE HYPERVISOR
PROJECT DESIGNED FOR IOT DEVICE

The Linux Foundation 

7-8 minutes 
-

PORTLAND, Ore., March 13, 2018 /PRNewswire-USNewswire/ -- Embedded Linux
Conference – The Linux Foundation [4] today announced a new embedded
reference hypervisor project called ACRN(tm) (pronounced "acorn"). With
engineering and code contributions from Intel(R) Corporation, the
hypervisor was built with real-time and safety-criticality in mind, and
optimized to streamline embedded development. This project will provide
a framework for industry leaders to build an open source embedded
hypervisor specifically for the Internet of Things (IoT). 

ACRN is comprised of two main components: the hypervisor and its device
model, complete with rich I/O mediators. Intel's experience and
leadership in virtualization technology was key to the initial
development of this hypervisor solution. 

"With project ACRN, embedded developers have a new, immediately
available hypervisor option," said Jim Zemlin, executive director of The
Linux Foundation. "ACRN's optimization for resource-constrained devices
and focus on isolating safety-critical workloads and giving them
priority make the project applicable across many IoT use cases. We're
pleased to welcome project ACRN and invite embedded developers to get
involved in the new community." 

Developers benefit from ACRN's small, real-time footprint, which is
flexible enough to accommodate different uses and provides consideration
for safety-critical workloads. Consolidating a diverse set of IoT
workloads with mixed-criticality on to a single platform helps reduce
both development and deployment costs allowing for a more streamlined
system architecture. An example of this is the electronic control unit
(ECU) consolidation in automotive applications. While open source
hypervisor options are available today, none share ACRN's vision of an
open source hypervisor solution optimized for embedded and IoT products.


"ACRN will have a Linux-based service OS and the ability to
simultaneously run multiple types of guest operating systems, providing
a powerful solution for workload consolidation," said Imad Sousou,
corporate vice president and general manager of the Open Source
Technology Center, at Intel(R) Corporation. "This new project delivers a
flexible, lightweight hypervisor, designed to take real-time and
safety-critical concerns into consideration and drive meaningful
innovation for the IoT space." 

ACRN will incorporate input from the open source, embedded, and IoT
developer communities and encourages collaboration and code
contributions to the project. Early ACRN project members include
ADLINK(R), Aptiv(R), Intel(R) Corporation, LGE(R), and Neusoft(R)
Corporation. To learn more about the project, visit
https://www.projectacrn.org [5]. 

SUPPORTING QUOTES 

"The lack of open source virtualization solutions for embedded,
real-time, and safety-critical systems has been greatly hindering
consolidation and to some extent the most interesting forms of fog
computing," commented Angelo Corsaro, chief technology officer of ADLINK
Technology Inc. "The release of ACRN as a Linux Foundation project by
Intel will be a game changer as it brings the agility and manageability
of virtualized environments into embedded and real-time systems. This
will be a key enabler toward making the Industrial Internet of Things
happen for real." 

"This approach from Intel fits very well within our product roadmap and
is a welcomed approach that will meet our customers' desire to have more
open source reference solutions," said Lee Bauer, vice president,
Mobility Architecture Group of Aptiv. "Aptiv is excited to be a part of
this new project, ACRN, and with it usher in a new era of flexibility
and scalability for our mobility IoT product solutions." 

"Because ACRN will allow for faster feasibility checking of ECU
consolidation, it will benefit our growing vehicle components business,"
said Seongpyo Hong, vice president of LG Electronics. "As a result, we
will be able to respond more quickly to OEMs' customized requirements
and will continue 

Re: Meltdown/Spectre; Linux on z affected?

[Dave Jones]

This is a good sources on information, imho:

https://meltdownattack.com/

DJ

---

DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and
Cloud
 703.237.7370 (Office) | 281.578.7544 (CELL)

INFORMATION TECHNOLOGY COMPANY [2]

On 01.05.2018 6:49 AM, Alan Altmark wrote:

> On Friday, 01/05/2018 at 08:21 GMT, Bernd Oppolzer
>  wrote:
> Am 05.01.2018 um 04:12 schrieb Neale Ferguson: A search of ibm.com still does 
> not reveal any official statements

about

>> spectre or meltdown wrt s390 and Power.
> https://www.ibm.com/blogs/psirt/potential-cpu-security-issue/ [1]

This PSIRT blog is where IBM will post the Official Statements about
this
issue, though you can expect, as Bill just pointed out, to see more
details for Z in the IBM Z Security Portal.

I know that as technicians it's frustrating, but if you are hearing
out-of-band information from small-badge IBMers (like me), ignore it and

use the portal and blog instead. Please don't look for anything from us
other than pointers back to those resources, whether online or offline.

Check them often for updates.

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott

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Re: Regina and THE (the hessling editor)

[Dave Jones]

Mark, they can be found here:

https://regina-rexx.sourceforge.io/index.html

DJ

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Cloud
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INFORMATION TECHNOLOGY COMPANY [3]

On 12.13.2017 9:34 AM, Mark Pace wrote:

> These used to be on the SDK. I can't find them on the SLES12 SP3 SDK.
>
> Have they been removed? Is there some where I can them?
>
> Thank you
>
> --
> The postings on this site are my own and don't necessarily represent
> Mainline's positions or opinions
>
> Mark D Pace
> Senior Systems Engineer
> Mainline Information Systems
>
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mark your calendar: "7.17.17."

[Dave Jones]

>From Timothy Sipples over on IBM-MAIN:

Here are a couple teaser videos:

https://www.youtube.com/watch?v=1mPEFvJeTKI
https://www.youtube.com/watch?v=sR6zjinyCTc

On IBM's Twitter feed there's also this link:

https://t.co/KpEfo9lUIW

and an exhortation to mark your calendar: "7.17.17."

--
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V/Soft Software
www.vsoft-software.com
Houston, TX
281.578.7544


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Re: Single user (rescue target) in SLES 12

[Dave Jones]

Hi, Mark.

Is there a list or doc someplace that has all of the valid PARM values
for IPL-ing SLES 12 in addition to the "PARM S" for getting into single
user mode?
Thanks.
DJ

On 06/26/2017 05:14 PM, Mark Post wrote:
> PARM S

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Re: Accounting on zVM

[Dave Jones]

Hello, Mariusz.

For quick and dirty z/VM accounting reports, I find CMS Pipelines very
useful. It can even connect to the CP *ACCOUNT service to product
reports in real time as data arrives.

DJ

On 05/25/2017 09:25 AM, O'Brien, Dennis L wrote:
> Andre,
> The VM:Account product from CA can process accounting records and create 
> reports.
>
>
> Dennis L. O’Brien
> Vice President
> Consultant II, z/VM Engineering
> Technology Engineering & Operations
> Bank of America
> CA4-704-06-15, 2000 Clayton Rd, Concord, CA 94520
> Dennis.L.O’br...@bankofamerica.com
>
> -Original Message-
> From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mariusz 
> Walczak
> Sent: Thursday, May 25, 2017 00:57
> To: LINUX-390@VM.MARIST.EDU
> Subject: Accounting on zVM
>
> Hello Community ,
>
> We are running VM 6.4. Do you know any tool or manual for processing
> accounting records on zVM? Those files are accumulating on our systems and
> I'd like to create a report from it. However, the data from column 29 is
> not human readable (""b"}a"") and I'm not sure how to process it.
>
>
> Thanks!
> Mariusz
>
> --
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The Mainframe vs. the Server Farm: A Comparison

[Dave Jones]

An interesting article from our friends at SUSE
https://dzone.com/articles/the-mainframe-versus-the-server-farm-a-comparison

Enjoy.
DJ

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Re: SHARE Providence

[Dave Jones]

That, and the z/VM Workshop that Paul mentioned, are the places to do it.
DJ

On 04/24/2017 10:59 AM, Andrew Lemay wrote:
> Thanks, for the message back. Really looking to just learning more about
> z/VM.
>
> On Sun, Apr 23, 2017 at 9:46 PM, Alan Altmark 
> wrote:
>
>> On Sunday, 04/23/2017 at 10:10 GMT, Andrew Lemay  wrote:
>>> I know this is not really mailing list for share. But I was thinking
>> about
>>> going. What should I expect to get out of the conference? I'm currently
>>> maintaining several z/VM instances with various configurations.
>> Well, you can get an idea from share.org, but here's what I get out of
>> SHARE
>>
>> 1. Meet a lot of the folks to live here and on IBMVM.
>> 2. Learn what's new in the Linux kernel and distros, as well as z/VM.
>> 3. Learn how to use the technologies these products provide
>> 4. Learn how and why others are doing what they do
>> 5. Learn some best/suggested practices
>> 6. Learn other relevant technologies (e.g. server, storage, z/OS)
>> 7. Have fun
>>
>> Alan Altmark
>>
>> Senior Managing z/VM and Linux Consultant
>> Lab Services System z Delivery Practice
>> IBM Systems & Technology Group
>> ibm.com/systems/services/labservices
>> office: 607.429.3323
>> mobile; 607.321.7556
>> alan_altm...@us.ibm.com
>> IBM Endicott
>>
>> --
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>>
>
>
> --
> ~~Andrew Lemay
>
> mobile: +1 978 886 4740
> gvoice:  +1 978 558 0413
>
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Re: Installing SLES 12 SP 2 on z/VM 6.4

[Dave Jones]

Agreed, Mauro.

Python is not installed on these zPDT servers. I just used yast and
installed the "thttpd" HTTP server. Once it is installed all you have to
do is start it; no configuration needed.

DJ

On 04/21/2017 02:31 PM, Mauro Souza wrote:
> Running python -m SimpleHTTPServer on the repository directory is enough to
> start a webserver, and it installs easily. Ftp is a strange misbehaving
> beast sometimes.
>
> On Apr 21, 2017 16:16, "Rogério Soares" <rogerio.soa...@gmail.com> wrote:
>
>> I had this problem too, solved install using http instead ftp
>>
>> Em sex, 21 de abr de 2017 15:55, Mark Post <mp...@suse.com> escreveu:
>>
>>>>>> On 4/21/2017 at 02:43 PM, Dave Jones <djo...@itconline.com> wrote:
>>>> Hi, Mark.
>>>>
>>>> Here's what appears to be the actual error, from y2log:
>>>>
>>>> File '/repodata/repomd.xml' not found on medium
>>>> 'ftp://ibmsys1@10.0.0.100/%2Fmnt'
>>>>
>>>> Some more background:
>>>>
>>>> Install is on a zPDT system
>>>> On the FTP server the file SLE-12-SP2-Server-DVD-s390x-GM-DVD1.iso is
>>>> loopback mounted on /mnt
>>>> The FTP server is running on: openSUSE Leap 42.1 (x86_64)
>>> And what is the home directory for the FTP server?  "/mnt"?  "/srv/ftp/"?
>>> Something else?
>>>
>>> What do the FTP server logs say about the retrieval attempts?
>>>
>>>
>>> Mark Post
>>>
>>> --
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>>>
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Re: Installing SLES 12 SP 2 on z/VM 6.4

[Dave Jones]

Hi, Rogério,

That worked, thanks.

DJ

On 04/21/2017 02:01 PM, Rogério Soares wrote:
> I had this problem too, solved install using http instead ftp
>
> Em sex, 21 de abr de 2017 15:55, Mark Post <mp...@suse.com> escreveu:
>
>>>>> On 4/21/2017 at 02:43 PM, Dave Jones <djo...@itconline.com> wrote:
>>> Hi, Mark.
>>>
>>> Here's what appears to be the actual error, from y2log:
>>>
>>> File '/repodata/repomd.xml' not found on medium
>>> 'ftp://ibmsys1@10.0.0.100/%2Fmnt'
>>>
>>> Some more background:
>>>
>>> Install is on a zPDT system
>>> On the FTP server the file SLE-12-SP2-Server-DVD-s390x-GM-DVD1.iso is
>>> loopback mounted on /mnt
>>> The FTP server is running on: openSUSE Leap 42.1 (x86_64)
>> And what is the home directory for the FTP server?  "/mnt"?  "/srv/ftp/"?
>> Something else?
>>
>> What do the FTP server logs say about the retrieval attempts?
>>
>>
>> Mark Post
>>
>> --
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>>
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Re: Installing SLES 12 SP 2 on z/VM 6.4

[Dave Jones]

Hi, Mark.

Here's what appears to be the actual error, from y2log:

File '/repodata/repomd.xml' not found on medium
'ftp://ibmsys1@10.0.0.100/%2Fmnt'

Some more background:

Install is on a zPDT system
On the FTP server the file SLE-12-SP2-Server-DVD-s390x-GM-DVD1.iso is
loopback mounted on /mnt
The FTP server is running on: openSUSE Leap 42.1 (x86_64)

Thanks.
DJ
On 04/21/2017 12:30 PM, Mark Post wrote:
>>>> On 4/21/2017 at 01:18 PM, Dave Jones <djo...@itconline.com> wrote:
>> Hello, all.
>>
>> Has anyone here been able to successfully install the latest SuSE SLES
>> 12 SP 2 on z/VM 6.4? I'm trying to do so today, but I'm getting a "can't
>> create the repository" error during the install process.
> Having information from /var/log/YaST2/y2log might be useful to figuring out 
> what went wrong.
>
>
> Mark Post
>
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Installing SLES 12 SP 2 on z/VM 6.4

[Dave Jones]

Hello, all.

Has anyone here been able to successfully install the latest SuSE SLES
12 SP 2 on z/VM 6.4? I'm trying to do so today, but I'm getting a "can't
create the repository" error during the install process.

Thanks, and have a good one.
DJ
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presentation on the history of the mainframe

[Dave Jones]

http://www.cs.niu.edu/aboutus/Dan%20GreinerIBM.ppt

Enjoy.
DJ
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Re: Killer penguins?!

[Dave Jones]

I think the more immediate question would be what did she eat last night
before going to bed? That should probably be avoided in the future

DJ


On 02/15/2017 12:31 PM, Phil Smith III wrote:
> My wife reports that last night she dreamed that she was in Australia and
> was attacked by thousands of penguins. I asked if they were talking, and she
> said no, they were silent-so not just killer penguins, *NINJA* killer
> penguins!!!
>
>
>
> Is there a support group for this?
>
>
>
>
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Re: EPEL

[Dave Jones]

Very good job, Neale.  Thanks.

DJ


On 02/13/2017 08:55 PM, Neale Ferguson wrote:
> The EPEL for ClefOS (CentOS) 7 is now available at
> http://download.sinenomine.net/clefos/epel7/
>
> There are around 13,000 (binary) packages for Linux on z along with their
> source in this repository:
>
> s390x:  7368
> noarch: 5589
> srpms:  6547
>
> These packages should be fine to run under 7.3 of RHEL as well.
>
> Neale
>
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Re: XMAS gift Ubuntu ooRexx 4.2 for s390x

[Dave Jones]

Hi, Rick.

I followed the instructions here:

https://community.linuxmint.com/tutorial/view/162

to create the .deb file. It seemed pretty straight-forward, I thought.

Happy New Year.

DJ


On 12/27/2016 06:40 PM, Rick Troth wrote:
> On 12/24/2016 10:51 AM, Dave Jones wrote:
>> I have created a Ubuntu ooRexx 4.2 .deb install file for the s390x
>> architecture, 64 bit. It has been tested on Ubuntu 16.04.1 LTS running as a 
>> guest of z/VM 6.3.
>> If anyone would like it, it can be found here:
>>
>> http://www.vsoft-software.com/oorexx_4.2.0-1_s390x.deb
>>
>> If anyone want the 32 bit version of ooRexx, drop me a note off list.
>> Happy Holidays.
> Awesome!
>
> You gotta show me how to build a DEB file. (Figgered out RPMs a while
> back.)
>
> There's a 32 bit version here ...
>
> rsync://pk.casita.net/opt/oorexx-4.2.0/
>
>
>  ... but it's compiled with a Chicory prefix. (So it's not necessarily
> interesting for simple payloading into a DEB file.)
>
> -- R; <><
>
>
>
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Re: XMAS gift Ubuntu ooRexx 4.2 for s390x

[Dave Jones]

Hi, Michael.

Thanks for the heads-up; I had shutdown the server over the holidays and
had not brought it back up. Try the download now.

Happy New Year.

DJ

On 12/26/2016 10:00 AM, Michael Weiner wrote:
> Hi Dave
>
> I tried to download the .Deb file from the link but it doesn't appear to be
> working.
>
>
>
> On Sat, Dec 24, 2016 at 3:12 PM, Dave Jones <djo...@itconline.com> wrote:
>
>> Thanks, Neale.
>>
>> Enjoy.
>>
>> DJ
>>
>>
>> On 12/24/2016 01:21 PM, Neale Ferguson wrote:
>>> Nice work Dave!
>>>
>>> For those on RHEL or ClefOS -
>>>
>>> http://download.sinenomine.net/OSS/7/s390x/ooRexx-4.2.0-
>> 9940.cl7.s390x.rpm
>>> There are also the Regina 3.9.1 packages on that site as well.
>>>
>>> Neale
>>>
>>> --
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>>
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>>
>
>
> --
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Re: XMAS gift Ubuntu ooRexx 4.2 for s390x

[Dave Jones]

Thanks, Neale.

Enjoy.

DJ


On 12/24/2016 01:21 PM, Neale Ferguson wrote:
> Nice work Dave!
>
> For those on RHEL or ClefOS -
>
> http://download.sinenomine.net/OSS/7/s390x/ooRexx-4.2.0-9940.cl7.s390x.rpm
>
> There are also the Regina 3.9.1 packages on that site as well.
>
> Neale
>
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Re: XMAS gift Ubuntu ooRexx 4.2 for s390x

[Dave Jones]

You're welcome, Ray.

DJ


On 12/24/2016 10:36 AM, Ray Mansell wrote:
> Excellent!
>
> root@ray:/tmp# rexx rexxcps.rex
> - REXXCPS 2.1 -- Measuring REXX clauses/second -
>  REXX version is: REXX-ooRexx_4.2.0(MT)_64-bit 6.04 16 Dec 2016
>System is: LINUX
>Averaging: 100 measures of 100 iterations
>
>  Performance: 8017343 REXX clauses per second
>
> That's on an EC12.
>
> Thank you, Santa Dave...
> Ray
>
> On 12/24/2016 10:51, Dave Jones wrote:
>> I have created a Ubuntu ooRexx 4.2 .deb install file for the s390x
>> architecture, 64 bit. It has been tested on Ubuntu 16.04.1 LTS
>> running as a guest of z/VM 6.3.
>> If anyone would like it, it can be found here:
>>
>> http://www.vsoft-software.com/oorexx_4.2.0-1_s390x.deb
>>
>> If anyone want the 32 bit version of ooRexx, drop me a note off list.
>> Happy Holidays.
>>
>> DJ
>>
>> --
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>> http://wiki.linuxvm.org/
>>
>
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XMAS gift Ubuntu ooRexx 4.2 for s390x

[Dave Jones]

I have created a Ubuntu ooRexx 4.2 .deb install file for the s390x
architecture, 64 bit. It has been tested on Ubuntu 16.04.1 LTS running as a 
guest of z/VM 6.3.
If anyone would like it, it can be found here:

http://www.vsoft-software.com/oorexx_4.2.0-1_s390x.deb

If anyone want the 32 bit version of ooRexx, drop me a note off list.
Happy Holidays.

DJ

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Erich Bloch, Who Helped Develop IBM Mainframe, Dies at 91

[Dave Jones]

Sad news:

Erich Bloch, Who Helped Develop IBM Mainframe, Dies at 91

http://www.nytimes.com/2016/11/30/technology/erich-bloch-who-helped-develop-ibm-mainframe-dies-at-91.html?smid=li-share&_r=0

DJ


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Re: zvm64 ipwizard

[Dave Jones]

Mike, I am using openSuSE 13 here on my Dell laptop with Firefox 49.

DJ
On 11/23/2016 11:43 AM, Mike Walter wrote:

The document appears just fine on my Surface Book laptop using the MS "Edge" 
browser (somebody has to use it!), and Chrome browser.  Looks just like the usual IBMLINK 
PSP page.
The sidebars displayed right over document text on my Android Samsung Galaxy 7 
Edge.  Mobile that page is not, but I wouldn't plan to review it from a phone 
anyway.

What are those who have problems with it using to view it?

Mike Walter

-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Rick Troth
Sent: Wednesday, November 23, 2016 11:31 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: zvm64 ipwizard

On 11/23/2016 12:22 PM, Duerbusch, Tom wrote:

Interestingit was readable here.
Do you think it was a codepage thing?

I initially tried reading it via hand-held.
The interaction has been annoying for years. "I just wanna read the doc!" 
Occasionally actually obstructive, like it was for me via mobile.

-- R; <><

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Re: zvm64 ipwizard

[Dave Jones]

Hi, Rick.

I found it a usable page. While I would have preferred a more "static"
presentation, this is the future, I am afraid.

What was your main objection to it, Rick?

Happy Thanksgiving to all.

DJ


On 11/23/2016 11:15 AM, Rick Troth wrote:

Another unreadable page thanks to IBM's Eclipse-based web interface into
their online doc. Just too much clutter, interference from interactive
crap.

Dead trees would have not been sacrificed in vain by comparison.

-- R; <><



On Nov 23, 2016 11:56 AM, "Cabiya, Manuel"  wrote:


if you are having issues with the ipwizard, read this note and avoid the
troubleshooting.

http://www-01.ibm.com/support/docview.wss?uid=isg1_TCPIP640_VM640




Manuel Cabiya




Email transmitted across the Internet is normally not protected and may be
intercepted and viewed by others. Therefore, you should refrain from
sending any confidential or private information via unsecured email to
PenFed. We will not ask you to send confidential information to us via
email, such as your logon ID, password, account numbers, or Social Security
number. We prohibit our employees from sending confidential information to
you via email that is not encrypted. The recommended document submission
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Re: Best way to edit Linux files in z/VM 3270

[Dave Jones]

I think it's always a good idea to have a Linux terminal server
available for just such instances when you *can't* reach the z/Linux
guest via the network.

There is a short writeup of how to build a terminal server here:

 http://www.vmworkshop.org/docs/2014/24dH6VdP.pdf

Have a good one.

DJ
On 09/20/2016 02:59 PM, Marcy Cortes wrote:

There's just mainly one sed command that i've needed in order to fix enough to 
get the network up.

sed -i -e 's/oldstring/newstring/'  filename

That's generally been enough to get me through say bad IP addresses or gateway 
settings.



-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mark Post
Sent: Tuesday, September 20, 2016 12:25 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: [LINUX-390] Best way to edit Linux files in z/VM 3270


On 9/20/2016 at 03:01 PM, "Diep, David (OCTO-Contractor)"


wrote:

Hi everyone,

I've searched everywhere and I cannot find for editing Linux files
while logged in with 3270. Vi will just get me stuck.  I looked at
'ed', but I get stuck as well... any recommendations??


The ed command works fine, but you need to understand how to use it.  It's ... 
different.

I frequently use sed, but if you're at the point where the root file system is 
mounted, you should be able to use the terminal server access.  This allows you 
to SSH to the terminal server, then connect to the target system and use the 
normal vi/vim editors.


Mark Post

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Re: Simple problem tracking system?

[Dave Jones]

If anyone needs it, I have a  copy here; I believe it's the last version
Cornell released.

DJ

On 09/19/2016 02:58 PM, Mike Walter wrote:

OK, just for the sake of completeness, and because if you are running
Linux on z/VM you already have the prereqs - there used to be a
freeware CMS-based tool called "PROBLEM".  IIRC it was highly
regarded and very extensible.  Not sure where you might be able to
find a download able copy now. Mike Walter

Sent from my Verizon, Samsung Galaxy smartphone 
 Original message
From: Michael MacIsaac 
Date: 9/19/16  12:47 PM  (GMT-06:00) To:
LINUX-390@VM.MARIST.EDU Subject: Re: Simple problem
tracking system?   Christian, Mark,

Thanks for the feedback - I'll look into them.

-Mike

On Mon, Sep 19, 2016 at 12:24 PM, Mark Post  wrote:


On 9/19/2016 at 07:04 AM, Michael MacIsaac


wrote: -snip-

Has anyone tried Trac/Genshi?  Or is any using a different
problem

tracking

system that helps their team to be more productive?


One of our internal teams uses RT  https://bestpractical.com/


Mark Post

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Re: DASD usage

[Dave Jones]

Hi, Steve.

I would suggest using option 3, a combination of ECKD and SANthe ECK
DASD for z/VM functions, like RACF (RACF requires 3390 DASD, btw), and
SAN for the Linux guests.

DJ

On 08/15/2016 09:49 AM, Gentry, Steve wrote:

There are at least 3 combinations of DASD usage for Linux implementation.
They are:

1)  Everything on 3390 storage

2)  Everything on non-3390, external disk via a fiber card

3)  A combination of 1 & 2



What are the thoughts on using these? Is one preferred over the other?

Thanks,

Steve



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Re: Back to the future?

[Dave Jones]

This might be of use to the group here.Rob van der Heij has written
an NTP client in CMS Pipelines. It can be found at:

https://rvdheij.wordpress.com/2014/05/12/getting-time-from-ntp/

He says he wrote it to be able to explore leap seconds and STP/ETR the
System z hardware platform.

Have fun.

DJ

On 07/28/2016 12:37 PM, Alan Altmark wrote:

On Tuesday, 07/26/2016 at 07:21 GMT, Martin Schwidefsky
 wrote:



The problem today is that VM will not generate a sync check when the
difference between NTP and the TOD becomes large enough that it cannot

be

steered out in a short period of time, such as when the external time
source is reconnected or when a leap second is added.


STP does not generate a sync check for leap seconds, they are not

included in

the TOD clock. The programming notes in the PoP about the Time-of-Day

Clock

you will find this:

"In converting to or from the current date or time, the programming

support

must take into account that leap seconds have been inserted or deleted
because of time-correction standards. When the TOD clock has been set
correctly to a time within the standard epoch, the sum of the

accumulated

leap seconds must be subtracted from the clock time to determine UTC

time."

... and we're off to the races.  :-)

You're right, I got it backwards.  I seem to do so every time I come back
to this after several months.  I also didn't mean 'sync check'.  I meant
the more generic "STP notification."  :-)

Time is a complicated subject.  Just ask Stephen Hawking.  Ignoring the
effects of gravity, there are still many moving parts needed to figure out
what time it is.
- The common frame of reference for the TOD clock
- TOD synchronization with NTP
- The ability of the OS and its apps to accurately calculate "now".

Here's what STP does:
1) Based on NTP, calculate what the proper TOD clock value should be.
2) Steer the machines in the STP timing network to that value.

That's it - it's that simple.  Well, it's simple to say, but much harder
to do.

For the purists in the room (I am one of them), the TOD clock needs to be
set as defined in the Principles of Operations.  That means using the
Standard Epoch, where a TOD clock value of zero represents 0h 1/1/1900.
And that means STP needs to know about leap seconds!

If you leave out the leap seconds, then every leap second that is
introduced moves the start of the TOD clock epoch backward one second.  In
such a system, if I looked at your TOD clock value now and started
counting down to zero, it would be 23:59:34 Dec 31, 1899.

Is that a sin?  No.  But it complicates things when you want to compare
TOD clock values in multiple systems to determine the order of events! All
systems within a System of Systems need to agree on "What time WAS it?" as
much as "What time IS it?" Such information may be needed for forensics
and failure to have a proper time stamp could bring the validity of any
evidence into question.

And while your lawyer can help you squirm your way out of the quagmire
between leap seconds, the introduction of the next one is the fatal blow.

Here's how it works:  STP is watching the NTP stream.  It calculates the
desired TOD clock value based on UTC and adjusts the TOD clock to match.
As long as two values are within 50us, we are happy.  The sun is shining,
a gentle breeze is blowing, the birds are singing, and the mosquitoes
aren't biting.  Our picnic is going famously!

Then there is a thunderclap and bolt of lighting.  While the TOD clock has
been steadily incrementing, the leap second arrives and stops time.  But
it doesn't stop the TOD clock.  As said above, STP looks at UTC calculates
the desired TOD and compares it to the actual TOD.  The actual TOD is one
second ahead of where it should be!

 +---+
 | EGAD! |
 +---++--+
 ||
 //
 \\

That's a number WAY larger than 50us.  The tornady's a-comin', run for
cover!  The next thing you know, there's blowing dirt in your eyes, the
ants are crawling on your food, and you have big welts on your body from
the mosquitoes!  STP flies into action: "Don't worry Tod, I'll save you!"

STP notifies all LPARs that have registered for the signal that the TOD
clock has lost synchronization.  At the same time STP starts slowing the
TOD clock.  In about 7 hours, the TOD clock will be back within 50us of
UTC and the registered LPARs will be notified that the clock is now back
in sync.  Calm returns, the dust settles, and the TOD clock is trustworthy
once again.

But silently, unobserved in the shadows, the TOD clock epoch has now moved
one second further back into 1899.  In a word, "Eeee!"

Any TOD clock values from before the leap second that are still being used
(e.g. in timers) are no longer valid.  Maybe being off by a second is ok,
maybe it isn't.  How do I know?  I worry more about legal and forensic
issues than the practical aspects of the difference.

When you include the leap 

Xmas in July -- encryption

[Dave Jones]

For those of us that are interested in encryption, there is a new
package available on the IBM VM download page called KM. It's a CSL
interface to the Cipher Message (KMxxx) instructions found on newer
hardware. Included are some Rexx Pipelines stages for encrypting records
flowing through a pipeline.

Enjoy.

DJ
--
*David Jones **
*Information Technology Company *

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Re: zLINUX gold image

[Dave Jones]

Hi, Kumar.

The best source of information on how to build and maintain z/Linux
"golden images", imho, are any of the Linux cookbooks done by Mike
Maclsaac.You can find them here:

https://sites.google.com/site/mike99mac/home
 The canonical method of sending files between z/VM (CMS) systems is the
CMS "sendfile" command. The "help cms sendfile" command will give you
more
information, proper syntax, etc.

Have a good one.

DJ

---

DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and
Cloud
 703.237.7370 (Office) | 281.578.7544 (CELL)

INFORMATION TECHNOLOGY COMPANY [3]

On 06.17.2016 6:00 AM, Veerendra Haluvadandimath wrote:

> Hi,
>
> I am looking for help with related to zlinux gold image builds.
>
> Also what is the best way send files under CMS. Any docs related to this
> helps as well. Thank you.
>
> Regards,
> Kumar
>
> --
> For LINUX-390 subscribe / signoff / archive access instructions,
> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
> http://www.marist.edu/htbin/wlvindex?LINUX-390 [1]
> --
> For more information on Linux on System z, visit
> http://wiki.linuxvm.org/ [2]


Links:
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[2] http://wiki.linuxvm.org/
[3] http://www.itconline.com/

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Re: Mainframes on the Internet

[Dave Jones]

Thank you. This is interesting reading.

DJ

On 06/06/2016 11:28 AM, VANDER WOUDE, PETER wrote:

https://www.bigendiansmalls.com/

http://mainframed767.tumblr.com/




-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Dave Jones
Sent: Monday, June 06, 2016 10:07 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Mainframes on the Internet

Where might those blogs be found?

Thanks.

DJ

On 06/06/2016 08:19 AM, VANDER WOUDE, PETER wrote:

Ed,

You are definitely correct on the contribution that these 2 guys they are 
making.  I was reading some of the blog entries by one of them, and there was 
some very interesting items documenting exploits that we all need to be aware 
of, that can compromise the security of the mainframe, even if your mainframe 
is not connected to the internet directly.

I know it opened my eyes a bit more.

Regards,
Peter


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
Ed Jaffe
Sent: Saturday, June 04, 2016 10:30 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Mainframes on the Internet

On 6/4/2016 3:53 PM, Gregg wrote:

Don't know Phil. Don't know what he's trying to say.

SoldierOfFortran, and his partner in "crime" BigEndianSmalls, have done the 
mainframe community a great service by raising awareness and dispelling -- with HARD 
PROOF -- the widely-held belief that mainframes had a magical bubble of invincibility 
protecting them from external penetration attacks.

--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/

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CONFIDENTIALITY NOTICE: This e-mail message and all attachments may contain 
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reading, dissemination, distribution, copying, or other use of this message or 
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703.237.7370 (Office) **|**281.578.7544 (Cell)*

*Information Technology Company <http://www.itconline.com/>*


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Re: Mainframes on the Internet

[Dave Jones]

Where might those blogs be found?

Thanks.

DJ

On 06/06/2016 08:19 AM, VANDER WOUDE, PETER wrote:

Ed,

You are definitely correct on the contribution that these 2 guys they are 
making.  I was reading some of the blog entries by one of them, and there was 
some very interesting items documenting exploits that we all need to be aware 
of, that can compromise the security of the mainframe, even if your mainframe 
is not connected to the internet directly.

I know it opened my eyes a bit more.

Regards,
Peter


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Ed Jaffe
Sent: Saturday, June 04, 2016 10:30 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Mainframes on the Internet

On 6/4/2016 3:53 PM, Gregg wrote:

Don't know Phil. Don't know what he's trying to say.

SoldierOfFortran, and his partner in "crime" BigEndianSmalls, have done the 
mainframe community a great service by raising awareness and dispelling -- with HARD 
PROOF -- the widely-held belief that mainframes had a magical bubble of invincibility 
protecting them from external penetration attacks.

--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/

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CONFIDENTIALITY NOTICE: This e-mail message and all attachments may contain 
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reading, dissemination, distribution, copying, or other use of this message or 
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*David Jones**|**Managing Director for zSystems Services **|**z/VM,
Linux, and Cloud
703.237.7370 (Office) **|**281.578.7544 (Cell)*

*Information Technology Company *


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