Thanks, Stefan!
Just installed Clefos 7.9.2009, did some yum updates, and uname says
3.10.0-1160.36.2.el7.s390x. We are on a z14 ZR1, so I'm thinking only SMC-Dv1
for us. And it works well among my z/OS systems.
I've found 5 or more releases of smc-tools out in the wild, the most recent
appears to be 1.7.0, which you released two months ago. Can't quite figure out
what or how to download, and the docs you recommended point to a 1.2.1-level
release.
Found I can't VMRELOCATE a Linux system that has a pcifunction attached. Does
the SMC and/or IP know while a socket is open that it has lost the pcifunction
and automatically revert to normal HiperSockets (or other IP) communication?
And after the VMRELOCATE completes, if a pcifunction is attached, can it
restart using SMC-D?
R;
Rob Hamilton
Infrastructure Engineer
Chemical Abstracts Service
-Original Message-
On 12/15/21 17:52, Hamilton, Robert wrote:
> I have a newly-created ClefOS server on my z/VM system. I have attached
> HiperSockets devices for each of my (5) HiperSockets networks. They are all
> configured, and I can talk to each of my z/OS systems over the appropriate
> HiperSockets networks.
> I want to ensure that my client can use SMC-D when talking with the z/OS
> applications on the same CPC. The z/OS systems already talk with each other
> over HiperSockets using SMC-D, so I already have PCIFs setup in the IODF, and
> can attach appropriate PCIFs to my new server.
>
> Then what? I see I don't have smc-tools on the system anywhere, so I need to
> get that and somehow make those available. I don't see my customer as wanting
> to use AF-SMC-type socket connections, so I'm guessing I need to run his
> application with smc-run...or...???
> Presumably it's the same using SMC-D over OSAs, but I'll configure that
> bridge when I come to it.
>
> If you can tell me what I need next, or point me to the appropriate
> documentation, I'd be most very grateful.
Hi Rob,
Yes, you can use smc_run to enable existing (binary) TCP applications to use
SMC-D. Which specific version of ClefOS are you on, and what are the levels of
the Linux kernel and smc-tools? If you have SMC-Dv1, check
http://www.vmworkshop.org/2019/present/linuxsmc.pdf, especially p21. If you
already have SMC-Dv2, check the presentation at
https://community.ibm.com/community/user/ibmz-and-linuxone/viewdocument/2021-07-15-boosting-tcp-networking?CommunityKey=c1293167-6d93-448e-8854-3068846d3dfe&tab=librarydocuments.
But, of course, I'll be glad to answer any questions, too!
Ciao,
Stefan
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Mit freundlichen Grüßen / Kind regards
Stefan Raspl
Linux on Z
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