On Wed, 29 Jan 2014 15:56:41 -0600, John McKown wrote: >LPARs are exactly like separate machines. Or maybe closer to virtual >machines under z/VM or VMWare or Hyper-V or ... . > Extremely close indeed. There are legends that in the earliest days of PR/SM one could recognize VM CP message prefixes flashing by on the HMC during startup.
On Wed, 29 Jan 2014 15:54:46 -0600, John McKown wrote: >As I recall, this dates back to the beginnings of TSO under MVT. As I >recall the story, the original (perhaps unreleased) version of TSO did >allow multiple signons to a single id. But there was some sort of problem >having to do with how to CANCEL a given session, or how to SEND a message >to a particular session. Back in the MVT days, the CANCEL command did not >have a way to direct the CANCEL to a given region (as the A= does to a >given address space today). So if you had an id signed on 3 times with only >1 of them "having a problem", then a CANCEL U=thisid would cancel all 3 >sessions. The same happened with started tasks and batch jobs. Oh, and I > So rather than repair the problem they withdrew the facility!? That might be a necessary stopgap; it should never have been accepted as a long-term solution. >think there was also a problem with the TIOC sending command output to the >wrong terminal. I.e. enter the LISTALC command on terminal#1 and the >results might go to terminal#2 instead. But I'm real vague on that last one. > I can do that right now. From a Unix System services, I issue Rexx "address TSO hmigrate DATA.SET.NAME" and watch messages appearing on my 3270 TSO session. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
