One person on the list even laughed at me when I mentioned IBM’s 99999 uptime goal.
————————————— Newsom won in a landslide. Believe Fauci & the science. Sent from Yahoo Mail for iPhone On Wednesday, September 15, 2021, 2:04 PM, Colin Paice <colinpai...@gmail.com> wrote: I remember a customer coming to tell IBM that they had had CICS up for 3 years continuously providing a service with no down time. "So what, people do this all the time" he said. "But for us, we have upgraded CICS, DB2, and z/OS to new versions. We have moved machine rooms (twice) and upgraded the hardware." Our recent computer science grads were amazed at this, having been used to rebooting at least once a week. They were gobsmacked - having thought a failover and restart within a minute on other platforms was pretty cool. We get so used to the z/OS levels of availability we forget others do not know about it. On Wed, 15 Sept 2021 at 18:00, Mike Schwab <mike.a.sch...@gmail.com> wrote: > Mainframes have been powered up 24*7*365 for their lifetime (a decade > + in some cases) since the 1960s. Just the occasional off / on cycle > if required. > > On Wed, Sep 15, 2021 at 4:07 AM Martin Packer <martin_pac...@uk.ibm.com> > wrote: > > > > It's amazing to think a machine could effectively be powered up > > continuously for quite a few years - even if it's not neglected. > > > > Amazing and good. > > > > Cheers, Martin > > > > Martin Packer > > > > WW z/OS Performance, Capacity and Architecture, IBM Technology Sales > > > > +44-7802-245-584 > > > > email: martin_pac...@uk.ibm.com > > > > Twitter / Facebook IDs: MartinPacker > > > > Blog: https://mainframeperformancetopics.com > > > > Mainframe, Performance, Topics Podcast Series (With Marna Walle): > > https://anchor.fm/marna-walle > > > > Youtube channel: > https://www.youtube.com/channel/UCu_65HaYgksbF6Q8SQ4oOvA > > > > > > > > From: "Radoslaw Skorupka" <r.skoru...@hotmail.com> > > To: IBM-MAIN@LISTSERV.UA.EDU > > Date: 15/09/2021 09:35 > > Subject: [EXTERNAL] Re: IPL's POR's frequency > > Sent by: "IBM Mainframe Discussion List" < > IBM-MAIN@LISTSERV.UA.EDU> > > > > > > > > My €0.02 > > > > IPL - never scheduled. Only when needed. Typical scenarios: > > 1. Configuration error, which need IPL (very rare, fortunately) > > 2. Hardware or software changes require IPL (maybe once a year, but IMHO > > less) > > 3. OPPORTUNITY. Yes - there are several disruptive application software > > releases per year. There is no problem to "steal" half an hour for "our > > own tasks" which may include IPL. However this point is usually > > connected to 2. which means HW/SW changes simply wait for such > > opportunity. > > > > IML/POR - never. > > Exception could be disruptive machine maintenance, like memory (physical > > DIMM) add or drawer preventive replacement. > > In the past there were disruptive microcode driver changes. > > > > -- > > Radoslaw Skorupka > > Lodz, Poland > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > > > > > > Unless stated otherwise above: > > IBM United Kingdom Limited - Registered in England and Wales with number > > 741598. > > Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 > 3AU > > > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > > -- > Mike A Schwab, Springfield IL USA > Where do Forest Rangers go to get away from it all? > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
