On Wed, 24 Jul 2024 09:48:05 -0500, Paul Feller wrote: >Rex, short answer is no. > >If you have access to the IBM RedBooks please look at the IBM Z Server Time >Protocol Guide (SG24-8480-01). This manual might help you with any questions >you have. > >https://www.redbooks.ibm.com/abstracts/sg248480.html > > >For several years the company I last worked at I pointed my hardware to the >companies NTP servers to sync the time for the sysplex. > How did you deal with the inconsistency that tOD is set to TAI minus 10 seconds (see the Notes for TOD Programmable Register in the PoOps) while NTP broadcasts UtC which takes Leap Seconds into account?
>Paul > >-----Original Message----- >From: Pommier, Rex >Sent: Wednesday, July 24, 2024 9:26 AM > >Yabbut... Do I still have to pay $10K's to buy an external timer in order to >get a fully automatic CST/DST time flip and to get my z14 to get in sync with >our NTP servers that the rest of our company uses? > That price seems to have decreased by about half within my memory, possibly because a well-designed system has *no* periodic "time flip, but rather a subroutine taking a timezone indicator and a physical time and returning a civil time correct in past, present, or foreseeable future. >Rex > >-----Original Message----- >From: Allan Staller >Sent: Wednesday, July 24, 2024 8:45 AM >Classification: Confidential (Really!?) > >z/hardware can do this automatically, and has done so for decades. >None of the major IBM subsystems depend on local time for logging and recovery >(since at least the late 80's > >Almost universal, however is "application paranoia". >The fear that there is something somewhere dependent on the local timestamp >and *might* break something. > >This has led to persistent 1 hour outage once/year for the fall time change >where the local timestamp can possibly overlap, in many cases. > Within my memory, IBM annually issued a bulletin advising such a shutdown. > >-----Original Message----- >From: EDWARD GOULD >Sent: Tuesday, July 23, 2024 2:56 PM > >---------------------SNIP--------------------------- >> >We used to have an ancient version of CICS that did that. The issue was that >it ran the ATMs and the online banking system. If it went down for more than X >amount of time (I think it was 15 minutes or an hour?), we were fined by the >fed 10K ($ ?). Everyone, including the management, did not want to touch it. >We were stuck with this, yet we had to keep the OS current. How do you want to >call IBM on an unsupported version of CICS? > But be aware of the integrity risks in running such an unsupported product. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
