WE used to shutdown and wait the hour. A few years ago we used some of our D/R system time to do some testing, and concluded we could dispense with the 1-hour wait.
We do use the SET TIMEZONE command, not the SET CLOCK command however, and of course, run with GMT clock = GMT, not local. Offset is still coordinated with local time, so all users *see* local time. We only have two manual efforts: - SET TIMEZONE=W.05 per lpar - once completed, then issue CEMT P RESET for each CICS region, well actually a masked modify command to get them all at once. I'd like to get to the point where the time change is automatic, but I fear we will never get to that point as there are a couple of app groups that are still afraid, and shut their applications down during the time we do this procedure. _________________________________________________________________ Dave Jousma Assistant Vice President, Mainframe Engineering david.jou...@53.com 1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f 616.653.2717 -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Charles Mills Sent: Monday, October 26, 2015 5:28 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: RE-IPL for the Daylight to Standard time conversion? I'm a developer, not an operations guy. My boss has asked me why a datacenter we use would need to IPL for the daylight to standard time transition. He asks if the box does not use UTC, and I said that yes, the hardware clock is generally set to UTC but that perhaps the LPAR time zone change required an IPL. Can anyone enlighten me? Why might our datacenter need or want to IPL for the Daylight to Standard time conversion? Thanks, Charles ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN
