Hi Jesse,

From what I understand the current plan to be as of typing of this response, 
the plan is to merge/move the lpars from the z13's to the z14.   There is no 
plan to collapse lpars into smaller number of lpars so no need to break out the 
abacus and slide rules to figure out workloads that need to merge and all that 
mess.   Those are my current marching orders and I am working towards that.   
Having said that a couple of weeks ago the marching orders were build a new 
sysplex, then last week it was upgrade from a single z13 to a z14 and this week 
it has morphed into merge/move all lpars from the two z13's into one z14.   The 
beauty of management directions and the right to change their minds.... 😊

Fred G.

________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Jesse 1 Robinson <jesse1.robin...@sce.com>
Sent: March 1, 2018 12:32 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Hardware upgrade z13 to z14....Yikes

I'm not clear on the scope of 'merging'. If you are just moving LPARs wholesale 
from two CECs to one CEC, it should not be too complicated. In particular, if 
you're careful, there should be minimal impact on users.

If you're consolidating LPARs, then you're in a whole new ballgame. That 
requires a great deal of planning and preparation.

In either case, you have to choose between push-pull and 'incorporation'. In 
the latter case, you add the new CEC into your configuration and move things 
gradually, then remove the old CEC. In the former case, you have to deal with a 
big bang event. Keep in mind a back-out plan in case the new configuration 
falls horribly flat. I've come over the years to prefer a 'fix forward' 
strategy that determines to correct problems and move on. Nevertheless you 
could encounter a problem so severe that the business would not put up the 
ensuing outage.

So many variables.

.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-543-6132 Office ⇐=== NEW
robin...@sce.com


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of fred glenlake
Sent: Thursday, March 01, 2018 6:36 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: (External):Re: Hardware upgrade z13 to z14....Yikes

Hi Chuck and list members,

I would be interested in knowing once you figure out the cause.   My upgrade is 
actually much more complicated that first presented.   We are going from two 
z13's with about 6 lpars on each to one z14 so not only are we upgrading we are 
merging as well just to make things more interesting.

We are going to run into duplicate definitions for channels, devices, etc. that 
we will need to rectify when we do the odd 30 minutes of planning....Ha.   The 
new z14 came with of course other new hardware HMC, routers, etc.   I 
personally have not had the experience of gluing two into one, all of the 
upgrades I have worked on have been one for one....up until now.

I would be interested in hearing if anyone else has merged two to one or three 
to one and their experiences.

FredG.

________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Chuck Kreiter <kreiter_ibm-m...@twc.com>
Sent: March 1, 2018 8:39 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Hardware upgrade z13 to z14....Yikes

We recently did an upgrade to z14's and have seen some unexplained problems.
It appears (unconfirmed as of yet, but should be soon) to be related to some CA 
products.  We should have confirmation later today or tomorrow.  Our upgrade 
was z12's to z14's and we are running z/OS 2.2.  If I get confirmation, I'll 
pass along more details.

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of fred glenlake
Sent: Monday, February 26, 2018 11:11 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Hardware upgrade z13 to z14....Yikes

Hi List,

My management must be in line to cash in on performance bonuses because they
have decreed we will upgrade our z13's to z14's in 90 days.   This was a
total out of left field surprise, perhaps our hardware vendor had a sale on for 
"Presidents Day", right next to the slacks and shirts and CEC's??

I am just starting to review the IBM considerations of going to z14's, lots
to consider and read which I do not mind.   Wondered if any list members had
already moved to z14's and could share any land mines they encountered 
upgrading.

At the 10,000 foot level I am thinking to get this done quickly hardware
wise we drop the new CEC's next to the existing ones.   Hook them up to
power, HMC's, etc.  Then grab a couple of cables from existing CEC's for
DASD and Tape, swing them over.   Use the existing IOCP and IOCDS as the
basis of the new IOCP/IOCDS, update serial numbers, models, etc.  Then bring up 
our sysprog lpar on the new CEC, get that one going, update and fix
software keys/licenses, issues with first IPL's on new CEC, etc.   Once all
the work is done in terms of getting ready for the rest of the lpars, then go 
for the big bang one weekend.  Bring down the rest of the lpars, drop the
cables, swing over to new CEC, hook up and IPL remaining lpars.   Assuming
no phat thumb checks it should work.  Of course there are a ton of 
considerations to review and check, coupling facility stuff, software stuff,
compatibility maintenance, etc.   However all things being equal I am
thinking this approach is likely the safest in terms of risk avoidance and
getting this done with the 90 days.   We could go the move one lpar at a
time route but that would mean more work and it would take longer especially 
with our change management processes (bless their little hearts).

Any alternate suggestions or comments would be appreciated as I am sure there 
will still be a few land mines with my name on them waiting in the woods.

FredG.


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