If you are wanting to be in a sysplex environment, then I would have to say the answer is no.
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Mark Jacobs Sent: Thursday, February 06, 2014 10:46 AM To: [email protected] Subject: Re: Sysplex Common Time Source I agree, but the question that my management team has requested for me to find out is whether we can use another mechanism to sync the time across the three CEC's without STP or ETR. Mark Jacobs On 02/06/14 10:38, Skip Robinson wrote: > I believe that the STP-to-9037 scenario was envisioned as an emergency > fallback option, not an upgrade (or rather downgrade) procedure. The > kicker is that your z10 does not have the STP feature now, but the z10 > is no longer upgradable. The only possibility I see is to acquire a > different CEC, either a comparable z10 that already has STP or an > affordable z196 or even z114. > > Bean counters become myopic from studying beans too closely. > > . > . > J.O.Skip Robinson > Southern California Edison Company > Electric Dragon Team Paddler > SHARE MVS Program Co-Manager > 626-302-7535 Office > 323-715-0595 Mobile > [email protected] > > > > From: Mark Jacobs <[email protected]> > To: [email protected], > Date: 02/06/2014 06:15 AM > Subject: Re: Sysplex Common Time Source > Sent by: IBM Mainframe Discussion List <[email protected]> > > > > You've hit the problem, we have two z196 processors that are STP > capable, but can't have the 9037's attached, and one z10 where we can > attach the sysplex timers, but that processor doesn't have the STP > feature. > > Mark Jacobs > > On 02/06/14 09:05, Dana Mitchell wrote: >>> On 02/06/14 06:38, Scott Chapman wrote: >>>> I believe that you can have a mixed CTN where one CEC doesn't have > STP, but in that case the external time source must be >>> the 9037 and I'm pretty sure that at least one of the CECs must be >>> both > STP and 9037 capable. I don't know what the implications > are from > converting from a pure STP environment back to a mixed environment, > but it seems like when we did the conversion to > STP there was some > sort of fall-back provision. >> The STP Implementation Guide Redbook SG24-7281 describes migrating >> from > STP-only CTN to Mixed CTN. They add this caution: >> A migration from STP-only to Mixed CTN may take considerable time due >> to > the potential >> difference in time between the Current Time Server and the Sysplex > Timer, at the start of the >> migration. Once the migration is selected, the STP facility will need >> to > steer the Coordinated >> Server Time (CST) towards the time being provided by the Sysplex Timer. >> >> On Thu, 6 Feb 2014 07:27:15 -0500, Mark Jacobs > <[email protected]> wrote: >>> That was what we originally though too, but our local IBM support > person >>> told us we couldn't. Thinking further about configuration activities >>> to migrate to mixed CTN mode, I'm not seeing how on the non STP >>> capable processor we're going to be able to set the name of the >>> mixed CTN, > since >>> it isn't going to have the STP tab for that CEC, >>> >> In a mixed CTN, one or more CECs can be only attached to the 9037's >> and > not even required to be STP capable. There must be at least one CEC > that is STP capable and attached to 9037's. >> >> Dana > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN > > -- Mark Jacobs Time Customer Service Tampa, FL ---- The quiet ones are the ones that change the universe... The loud ones only take the credit. Londo Mollari - Babylon 5 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
