Dave,
If by processor you mean the sZeries CPC, then your understanding
might be a little off...
My understanding is that the timer just sends timing signals to the CPC,
it is unaware of what the CPC is doing. Basically it is a one way
process. Whether there is a CLO or not, the 9037 never gets
In a recent note, Roy Hewitt said:
Date: Thu, 23 Mar 2006 12:42:46 +
My understanding is that the timer just sends timing signals to the CPC,
it is unaware of what the CPC is doing. Basically it is a one way
process. Whether there is a CLO or not, the 9037 never gets the time
Paul Gilmartin wrote:
What initially sets the content of the TOD clock at IPL (or
is it POR) time. IIRC, there is some setting that can only be
accomplished at POR. Is there a clock in the HMC, so the
data path for that initial setting might be:
ETR to HMC (at POR)
HMC to TOD (at
On Sat, 18 Mar 2006 23:13:33 -0600, Alan C. Field
[EMAIL PROTECTED] wrote:
Eric,
Almost I think.
The Sysplex Timer is a big clunky box. It connects to a PC as it's
console
We have a modem plugged into the PC that dials out to NIST.
I think the CLO (CLOck?) card is the card in the processor
Eric,
Almost I think.
The Sysplex Timer is a big clunky box. It connects to a PC as it's
console
We have a modem plugged into the PC that dials out to NIST.
I think the CLO (CLOck?) card is the card in the processor that connects
to
the Sysplex timer.
On 17 Mar 2006 09:34:16 -0800,
in
What release of z/OS are you?
Either Keith Clapp's SNTP code or the SNTP server that is part of z/OS.
Have all the
other platforms synchronize to z/OS.
We have been doing that for about 4 years - seems to be working well once
we
overcame the political/idealogical problem that z/OS could
On 16 Mar 2006 15:34:50 -0800,
[EMAIL PROTECTED] (Jerry Whitteridge) wrote:
Run the NTP server on the parallel sysplex and have the other platforms
use it as the time source.
That's certainly a viable solution, but...
In some environments, running the NTP server on the mainframe will do a
very
The original poster signaled that they had a parallel sysplex which to
me implies he already has an ETR. I must admit I forgot about those
shops running on a single footprint with no ETR.
On Fri, 2006-03-17 at 09:10 -0600, Eric Chevalier wrote:
That's certainly a viable solution, but...
In
In a recent note, Alan C. Field said:
Date: Fri, 17 Mar 2006 08:11:42 -0600
Either Keith Clapp's SNTP code or the SNTP server that is part of z/OS. Have
all the
other platforms synchronize to z/OS.
We have been doing that for about 4 years - seems to be working well once we
Paul, Given that the poster asked how he could do it, not what would be
the best if things were different I think our answers were not arrogant
but accurate.
If this, If that doesn't fix the problem. If IBM might do something it's
still in the future, and were not discussing what IBM should do but
On 17 Mar 2006 08:54:05 -0800,
[EMAIL PROTECTED] (Jerry Whitteridge) wrote:
The original poster signaled that they had a parallel sysplex which to
me implies he already has an ETR. I must admit I forgot about those
shops running on a single footprint with no ETR.
I may be mistaken (it happens a
Then I'm confused. ETR = External Time Reference = Sysplex Timer
( If I want to see the status of my sysplex timer I issue the command D
ETR)
What leads you to write ETR != Sysplex Timer ? (I'm curious -- with the
exception of a parallel sysplex running on a single footprint (which I
agreed I
On 17 Mar 2006 10:22:46 -0800,
[EMAIL PROTECTED] (Jerry Whitteridge) wrote:
Then I'm confused. ETR = External Time Reference = Sysplex Timer
( If I want to see the status of my sysplex timer I issue the command D
ETR)
What leads you to write ETR != Sysplex Timer ? (I'm curious -- with the
See SG24-2070 S/290 Time Management and IBM 9037 Sysplex Timer
300 plus pages.
My interpretation is that the Sysplex Timer IS the ETR.
You connect it to an ETS (External Time Source), modem dialing NIST (what
we do here),
GPS or WWV receiver and that gets the timer in sync with the rest of
On Fri, 2006-03-17 at 11:15 -0600, Eric Chevalier wrote:
I may be mistaken (it happens a couple times a year :-) ), but I was under
the impression that a parallel sysplex did *not* require an ETR, only a
sysplex timer.
ETR != Sysplex Timer
Increment the count.
ETR *IS* the Sysplex timer.
On 17 Mar 2006 12:49:15 -0800,
[EMAIL PROTECTED] (Shane) wrote:
And (of course) if you wish to use an external time source to synch your
ETR you have to plug another bit of hardware in to do the job.
OK, I stand corrected, at least on my terminology, and possibly on the
cost of that other bit of
On 17 Mar 2006 09:34:16 -0800,
in bit.listserv.ibm-main I wrote:
I may be mistaken (it happens a couple times a year :-) ), but I was under
the impression that a parallel sysplex did *not* require an ETR, only a
sysplex timer.
ETR != Sysplex Timer
Based on feedback from Alan Field, Shane and
Eric Chevalier wrote:
OK, I stand corrected, at least on my terminology, and possibly on the
cost of that other bit of hardware required to keep the plex in synch
with real-world time.
Depends on whether your plex is just LPARs on the same box or
different boxes connected together. A
In a recent note, Edward E. Jaffe said:
Date: Fri, 17 Mar 2006 14:29:16 -0800
Eric Chevalier wrote:
OK, I stand corrected, at least on my terminology, and possibly on the
cost of that other bit of hardware required to keep the plex in synch
with real-world time.
A z800 cannot
FWIW.
We got our 3 9037-1 approx 3 years ago for USD1000 a piece.
Two online, one in case the other breaks.
None have broken. They are set to synchronize with
Boulder NIST once a day. We've had zero problems and zero issues.
Consequentially, the NTPD daemon on z/OS always serves up the
correct
Dear folks;
We have a necessity to synchronize our IBM Parallel Sysplex with other
platforms, i.e. HP Non Stop, Sun, PSeries, etc. I'm aware that PS does not
support NTP.
I was thinking if with STP we can achieve this but with the information I
have, I think the answer seems to be a big NO.
Any
To what level of precision is synchronization required?
To a 0.1 / second?
To a 0.01 / second?
To a 0.001 / second?
If the first, or perhaps the second, if all servers sync to NIST in Boulder
CO, then they'll all be the same. NTP synchronization amongst all the
platforms you cite will
To: IBM-MAIN@BAMA.UA.EDU
Subject: TOD Sync acroos platforms (IBM and non-IBM) - STP?
Dear folks;
We have a necessity to synchronize our IBM Parallel Sysplex
with other platforms, i.e. HP Non Stop, Sun, PSeries, etc.
I'm aware that PS does not support NTP.
I was thinking if with STP we
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