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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!IS.RICE.EDU!DBOYES
- X-Mailer: ELM [version 2.3 PL11]
- Message-ID: <9212260746.AA13087@brazos.is.rice.edu>
- Newsgroups: bit.listserv.ibm-main
- Date: Sat, 26 Dec 1992 01:46:17 CST
- Sender: IBM Mainframe Discussion list <IBM-MAIN@RICEVM1.BITNET>
- From: David E Boyes <dboyes@IS.RICE.EDU>
- Subject: Re: Logical Partitions/Physical Partitions
- Comments: To: IBM-MAIN@ricevm1.rice.edu
- In-Reply-To: <9212260728.AA03260@is.rice.edu>; from "Leonard D Woren" at Dec
- 25, 92 11:26 pm
- Lines: 50
-
- Gee, I'm glad I'm not the only one up at this hour...8-).
-
-
- > When is G.A. for VM/ESA 1.2? When *was* G.A. for MVS/ESA V4?
- > So maybe I was wrong; MVS/ESA V4 is 3-4 years ahead of VM/ESA, not 5.
-
- GA for VM/ESA 1.2 is this month. The date December 28th sticks
- out in my mind, but I don't have the ivories at hand at the
- moment.
-
- I don't think anyone would disagree that all the good stuff gets
- put into MVS first -- after all, it's IBM's biggest cash cow. I
- still wish VM handled tapes as well as MVS does.
-
- > If a critical *VM* disk has a problem, you have to shutdown *VM* to
- > fix it, and therefore you have to shutdown your MVS *production*
- > guest, because *some other* O.S. has a problem. This is just plain
- > unacceptable in most shops. If the MVS production guest is under
- > LPAR, you don't have this problem.
-
- OK. Sorry I missed that point. The preferred guest recovery stuff
- does help somewhat with that problem, however to take full
- advantage of the feature, you end up replicating hardware to keep
- VM and guest OS devices on separate controllers. I've seen shops
- that ran several preferred guests take a VM hit and the only
- thing they lost was the VCTCAs connecting the guests. When VM
- came back, all they had to do was redefine/recouple the VCTCAs
- and issue a couple of VTAM and JES commands to restart things.
-
- Don't get me wrong -- that kind of recovery takes a lot of
- planning, but it's the same sort of planning you'd have to do for
- LPAR.
-
- > > require an IOCP change, though -- doesn't that still require a
- > > disruptive IML?
- > No!
-
- Ah, good. I was hoping that was what those options on my ES/9K
- support console were for.
-
- > >From what you're saying, I'd guess that VM/ESA 1.2 still doesn't
- > support dynamic reconfiguration like MVS/ESA V4.2 does.
- > /Leonard
-
- Since I'm taking VM/ESA 1.1 production tonight, I don't have any
- direct experience with 1.2, but I hope to soon. What I know about
- 1.2 is based on discussions on VM/Share and the ivories -- the
- way I interpret the ivories, it looks like the dynamic
- reconfiguration support takes advantage of the same features that
- the MVS config support does. We'll see.
-