Here I must completely agree with Lennie (and not just because of the great tag-line) on the first bullet. While the product I am most responsible for hasn't required an IPL in many years (not for a new install or even a release upgrade) the idea of doing an IPL as part of a new installation does validate that a future IPL will also work. Nothing worse than running for weeks/months after a dynamic upgrade only to find that the IPL parameters were never correctly modified and now the system doesn't come active correctly with the once-a-quarter IPL. Now, a good product (in my opinion) should be one that can be dynamically activated for testing purposes and then dynamically de-activated (removing all traces of itself) after the testing is complete so that an IPL is used for the final installation.
But, that does cause problems for sites with a once-a-quarter IPL routine when you include the caveat that only 1 "change" should be made with an IPL. How many of us have had to fight the "6 things changed, and now the system won't IPL - what do we back-out first" problem? But, making one-change per IPL and only doing quarterly IPL's means you are always going to be VERY behind in maintenance and releases and taking advantage of new features/functions. Just my opinion. I have a sandbox that I can IPL as often as I want on a daily basis - lucky me. Russell Witt Broadcom -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Lennie Dymoke-Bradshaw Sent: Monday, September 16, 2019 2:49 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: LPA - IPL or dynamic Peter, I think it depends entirely on how the product is installed. The various methods required might include, 1. LPA modules 2. Nucleus extensions 3. SVC(s) 4. New APF libraries 5. New linklist libraries 6. PPT modifications 7. Front-ending of existing SVCs 8. Console definition modifictions 9. Sub-system defintions .......and many other types of changes to system libraries or definitions. Each site will have standards about whether they allow such changes in-flight, or require an IPL. There are benefits with the IPL method. One is that you prove the system configuration. You might also wish to consider that installing on one system is fine, but then the product may need to be activated on another LPAR in the Sysplex. Often however, the system initialisation changes can be mode for the first install and then library updates can be performed for an update. Hope that helps. Lennie Dymoke-Bradshaw | Security Lead | RSM Partners Ltd Web: www.rsmpartners.com ‘Dance like no one is watching. Encrypt like everyone is.’ -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Peter Sent: 16 September 2019 18:54 To: IBM-MAIN@LISTSERV.UA.EDU Subject: [IBM-MAIN] LPA - IPL or dynamic Hi I have seen few vendors suggesting an IPL as requisite if you are doing the product install for first time and If it's upgrade then it's not required. I am ignorant here. How does this makes a difference ? Why a dynamic update won't work if it's a first install ? Programmatically how does it work from zOS perspective. Apology if this question was already discussed here if so please point me to the discussion link . Regards Peter ---------------------------------------------------------------------- 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
