As it happened to work out, we had a scheduled DR test this week, but
our mainframe is now in Poughkeepsie at an IBM data center.
September 13, 2017 at 6:35 PM
Thanks for the memory jar.
Did your company go into DR mode when IRMA hit?
Ed
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September 13, 2017 at 3:57 PM
University Computing Company (UCC), later known as UCCel. I think that
DUO was UCC-2, TMS was UCC-1.
Mark Jacobs
September 13, 2017 at 3:41 PM
Post by Peter HunkelerPost by Elardus EngelbrechtWhat modules do you want to reload? If that is in LPA and/or Linklist, you better be careful before issuing commands to refresh them. Of course YMMV.
Well, the nucleus is the nucleus, LPA is the LPA, and the linklist is the linklist. They are different beasts. The first two are different areas in the virtual address space map, the third is noting but a list of data set to be searched for load modules. The OP asked about dynamically updating the nucleus, and this is nothing that MVS supports up to date.
--
Peter Hunkeler
Long time ago and when MVS first came out, we used to do this quite often (once a week). A product we had called DUO (DOS under MVS). DUO maintained a table in the nucleus for which dos jobs were running. They had a bug in their code that would not delete entries. We had to go in and blank out the job names that were not running(so as not to have to IPL). We finally got tired of doing this and wrote a program that did it.
Worked like a charm. They asked for the program and we were not in a good mood so we said no. It took them a year to figure out how to do it.My memory is hazy here but I think the degression was
“duo” -> went to some company in Dallas? and then a year or two later CA bought them out. By then we had gotten rid of all the jobs. One of the long time contributors to IBM-Main used to work for the company if he hasn’t retired maybe he could speak up?
Ed
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September 13, 2017 at 1:11 PM
Well, the nucleus is the nucleus, LPA is the LPA, and the linklist is
the linklist. They are different beasts. The first two are different
areas in the virtual address space map, the third is noting but a list
of data set to be searched for load modules. The OP asked about
dynamically updating the nucleus, and this is nothing that MVS
supports up to date.
--
Peter Hunkeler
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September 13, 2017 at 8:43 AM
You better listen to Binyamin Dissen who kinldy replied to you.
What modules do you want to reload? If that is in LPA and/or Linklist,
you better be careful before issuing commands to refresh them. Of
course YMMV.
If these modules are SVC modules, I would recommend you to rather IPL.
But ask your ISV, they wrote the product and they certainly can assist
you way better than IBM-MAIN.
If still unsure, put all your updated libraries on another set of volsers and IPL.
Groete / Greetings
Elardus Engelbrecht
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The standard you walk past is the standard you accept.
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