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
