Hello,

Am 15.09.2020 um 20:35 schrieb jnbutler1815 via groups.io <jnbutler1815@...>:

I have Hercules started and when I start MVS it says it is waiting for port 3270 to become free.

This sounds if some application (or another instance of Hercules) is already running on Port 3270.

You can search manually with netstat in the terminal, or just reboot and see if that fixes the issue.

:wq! PoC

PGP-Key: DDD3 4ABF 6413 38DE -

I have setup Hercules and MVS on my iMac. I have Hercules started and when I start MVS it says it is waiting for port 3270 to become free. Well, Hercules is listening on that port. Is this the correct way or do I need to change one of them to listen on a different port? This is my first time trying to run emulation software and the documentation for both does not mention this at all.
Thanks for any help....

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On the mainframe, I use IEBUPDTX, which is a modification of IBM's IEBUPDTE.? It is a "poor man's" Version Control System.? IEBUPDTX is simple and effective in version tracking. It is pre-installed on Tk3 and I believe on TK4- as well.? Downside is no security for "production" code.

I recently discovered (thanks to an RPF upgrade) ARCHIVER.? It is another "poor man's" VCS that compresses and stores files in VSAM clusters.? Files stored are not limited to source code.? RPF 1.8.3 supports an interface to ARCHIVER.

Since I now use SPFlite on the PC almost exclusively,? I am experimenting with using GIT.? I am experimenting with a semi-automatic "sync" between a pc directory and a PDS.

On Fri, 11 Sep 2020, John James wrote:

Peppe, this might or might not be completely irrelevant, but some time ago I posted in
one of the Hercules groups asking whether anyone else had experienced strange disk I/O
errors after having closed their laptop for a while. Nobody else had seen this, so I
never investigated any further, and I have just made sure ever since that I don't
close my laptop. I saw the problem whenever I closed the lid with either MVS or MVT
running; DOS/360 and DOS/VS were never affected.

My bet? It depends from how the host OS, and its bare hardware,
where the hercules emulator run, behave.

From my experience I would say that a complete power loss
is rarely a source of such an error.

A "Page File Error", I guess, may come or from an error
of the hercules emulator, flushing its buffer to emulated
dasd files or from an error of the guest OS, same problem.

From the picture I have in mind, assuming the hercules
emulator can't find any error on emulated dasd files,
it should happen the emulator had a "write()" call which
returned correctly from the OS, a write to page dasd
volumes, which never actually wrote anything on the
physical disks, which buffers had been lost somewhere in the path
betweek HD cache and HD physical plates.

This may actually happen, in my experience, in
some weird configuration of OS, filesystems and physical disks.

It shouldn't neither come from the hercules emulator
itself, neither from the guest MVS system.

Peppe.

I am not running the 38J system, but I have had the same problems. I did a hercules STOPALL then hibernated my windows then the next day restarted and did a STARTALL and expected it to come back. Basically most of the time it worked fine. MVS got confused for a bit and then would be OK. However after a week, I got some strange things happening. I spent a week rebuilding my dasd from backups because not only were there page file errors, but spool errors and damaged PDS directories. Now I have good backups, and always shutdown cleanly. Never leaving my hercules and "closing the lid". I wasn't aware of the QUIESCE command though - thanks for that.
I started leaving the hercules running because the shutdown/IPL was taking time and I was impatient. Lesson learnt!

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Well, another option is to add a paging volume, define a page data set, add it.
Then for the datasets in use, drain the dataset, delete, define, and add.
Then drain the new dataset and leave in place for the next time, or
for a high use occurrence.

--
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?

Peppe, this might or might not be completely irrelevant, but some time ago I posted in one of the Hercules groups asking whether anyone else had experienced strange disk I/O errors after having closed their laptop for a while. Nobody else had seen this, so I never investigated any further, and I have just made sure ever since that I don't close my laptop. I saw the problem whenever I closed the lid with either MVS or MVT running; DOS/360 and DOS/VS were never affected.
JJ

On Wed, 9 Sep 2020, laddiehanus via groups.io wrote:

When you want to stop MVS and Hercules do you do a complete shutdown of MVS and issue
the QUIESCE command as the last thing you do on the MVS console? This command puts MVS
in a wait state after all pending I/O is processed. It is possible that than some
paging may be going on.

When I can, of course, I use QUIESCE to stop MVS3.8j, but
in some occasion, for example when I forget hercules
is running or for a power fail, MVS is stopped in the worst
possible way.

While I've noticed, occasionally, JES2 troubles, at IPL time,
after the failure, I've never seen a PAGE file error, so far.

The probability has to be really low, at least for the
workload of the MVS emulated systems I keep running.

Peppe.

Hi,

You can check your page dataset configuration with TSO command IM.
Select option P.

Cheers,
Rob

If an IPL does not fix the issue, just copy the particular DASD Page Hercules file in question from the distribution. ?

While not a scientific solution, it is low risk. I have used this solution in one or two cases over the last several years.?

I suggest backing up all the Hercules DASD files periodically — disk space is cheap these days. Maybe you are already doing that? ?If so, I apologize for the suggestion.?
--
Regards,
Bernie (did 360 assembler programming on IBM Model 75 in late 1960s)

Rob,
Thanks for the enhancement. I don’t need to browse test.archive..I was just using it as an example of a KSDS that is all.
-don

Sent from my iPad Air 2

Hi,

Maybe an IPL with CLPA will resolve your issue.

Cheers,
Rob

Hi Don,

Thanks for your suggestion.

I've made a little change in RPF 3.4. and now you see TEST.ARCHIVE.
But you cannot browse a VSAM file in 3.4. I know that RFE can browse VSAM clusters.
This will be a future enhancement of RPF. I consider to invoke IDCAMS to process a
PRINT statement.

But why do you need to browse an archive in 3.4? You have option 3.9.
RPF 184 is now also available on cbttape.org, Look in de Updates section.
After obtaining FILE415.XMI and uploading to your MVS system, run job $XMIT370 to
RECEIVE the LOADXMIM member to create the RPF load library.
After copying the load modules to SYS2.CMDLIB, your new version is installed.

Thanks again for your suggestion for browsing VSAM clusters.

Cheers,
Rob