Good question. However better question is why LPARs withing single CPC
cannot communicate via some emulated channel like ICP or IQD. The only
reasonable answer is because IBM decided. Was the decision reasonable?
That's another question.
Fortunately for FICON CTC it is enough to use *one* channel connected do
a switch. And the channel may be shared, that means may also serve
another CUs.
Assuming poor configuration and lack of budget, that could be a solution
to use two (redundancy) existing FC chpids, attached to switch. Of
course I would choose less busy channels.
BTW: GRS ring is not for free. It will take CPU cycles. And it will
introduce delays.
The alternative for GRS ring is ...maybe no GRS between LPARs. Maybe
workload can be consolidated on single LPAR or resources may be not
shared. Or sharing may be reorganized.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 02.06.2020 o 05:42, kekronbekron pisze:
Just curious .. why does it have to be FICON CTC, why can't it be SMC-D/R or
HiperSockets or one of those ICA-SR (or whatever it's called) connectors IF 2
machines are involved.
- KB
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, June 1, 2020 6:29 PM, Allan Staller <allan.stal...@hcl.com> wrote:
See the manuals "Setting up a SYSPLEX" and "Merging Systems Into A SYSPLEX".
Both can be found on the IBM zOS Library site.
Some key items not available in a base sysplex:
GRS START (use CTC for inter-image communication.
VTAM Generic resources, VTAM MNPS
RACF data sharing (RACF sysplex communications is available)
Many others. All are described in Setting Up a SYSPLEX
HTH,
-----Original Message-----
From: IBM Mainframe Discussion List IBM-MAIN@LISTSERV.UA.EDU On Behalf Of Brian
Westerman
Sent: Sunday, May 31, 2020 2:05 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Base SYSPLEX setup
[CAUTION: This Email is from outside the Organization. Unless you trust the
sender, Don’t click links or open attachments as it may be a Phishing email,
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Hi,
I'm looking for information on how to set up a base SYSPLEX with only Ficon
CTC's that seem to be referred to as XCF CTC's.
I'm sure someone had done this before and is probably doing it now for Multiple
LPARs that are running on the same processor CEC. Configuration help (parms
etc.) would be greatly appreciated. I think all we need to do to connect the 3
existing LPARs is purchase 2 FICON cards (we currently have no extras).
Unfortunately, the IBM docs seem to talk a lot about the full parallel
sysplexes (with Coupling facilities), but we don't have them, and they seem to
be a great deal more expensive than FICON cards which are all we need to
implement GRS anyway (that's our goal). We can also apparently create a virtual
CF, but the overhead appears to be far greater than we can spare.
Any CXF CTC setup information would be greatly appreciated.
Thanks
Brian
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