Hi, all,

Long time no post.  I've been reading along again for a while in my current
gig but haven't felt the need to post.

New project has us getting some z10 machines and I have a question for you
all.  Feel free to post directly to me or reply here if you want.  I fully
expect it to end up as a "it depends" kind of answer, but if you have an
opinion for which machine you might go with please chime in.

Not really relevant which z10s we are looking at, one is 3 CPUs and another
is 5 CPUs, total MIPS etc within a hiccup of each other.

We have a dozen prod CICS regions, 20ish test CICS, some DB2 (most DB work
is Oracle on squatty boxes), lots of CICS transactions written to be single
threaded.  Mostly FICON to EMC disk and STK silos.  OSA for web traffic,
little SNA gojng away soon.  Will run z/OS 1.10.  No zLINUX (too bad!), no
IFLs, ZIIPs ZAAPs, etc.

One PROD LPAR, 6 am to midnight online services, batch runs midnight to 3 AM
WedThrFriSat and to 6 AM Tues, not much Sun or Mon batch to speak of. TEST
LPAR is a SYSPROG test LPAR, a nit in size and rarely used other than for
maint and upgrade work.

Growth in workload will be moderate for some time, possible consolodation
work will add LPARs down the line.

If you had two machines, equal MIPS z10 BC boxes, would you want the box
with 5 CPUs or the one with 3 CPUs?  Memory, etc all equal.

All answers are opinions and I will gladly accept them all to be correct for
the replier.  We all have our reasons why one might be better than the other
based on experience.  This is a gut feel kind of thing.  I would like to see
if there is a consensus and will tally a set of finding for posting sometime
next week.

Thanks in advance,
Happy [insert holiday of choice here]
Peter Duffy
Los Angeles, CA, USA, Earth

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