Reduced Latency And Improved Wall Clock Time With Smc-R; D.2.9 Smc-R Support Overview - IBM z13s Technical Manual

The following advantages are gained as shown in Figure D-8:
No middleware or application changes (transparent)
Ease of deployment (no IP topology changes)
LPAR-to-LPAR communications on a single central processing complex (CPC)
Server-to-server communications in a multi-CPC environment
Retained key qualities of service that TCP/IP offers for enterprise class server
deployments (high availability, load balancing, and an IP security-based framework)
Figure D-8 Reduced latency and improved wall clock time with SMC-R

D.2.9 SMC-R support overview

SMC-R needs both hardware and software support.
Hardware
SMC-R requires the following hardware:
PCIe-based RoCE Express
– z13, z13s, zEC12, and zBC12 servers
– Dual port 10 GbE adapter
– Maximum of 16 RoCE Express features per CPC
HCD and input/output configuration data set (IOCDS):
– PCIe FID, VF (sharing), and RoCE configuration with PNet ID
Optional: Standard 10 GbE switch (CEE-enabled switch is not required)
Required queued direct input/output (QDIO) Mode OSA connectivity between z/OS LPARs
as shown in Figure D-5 on page 481.
Adapter
least in shared mode) to one or more LPARs on a z13 or z13s server.
SMC-R cannot be used in IEDN.
Software
IOCP required level for z13s: The required level of IOCP for the z13s server is V5 R2 L1
(IOCP 5.2.1) or later with program temporary fixes (PTFs). For more information, see the
following manuals:
z Systems Stand-Alone Input/Output Configuration Program User's Guide, SB10-7166.
z Systems Input/Output Configuration Program User's Guide for ICP IOCP, SB10-7163.
must
be dedicated to an LPAR on a zEC12 or zBC12. And it
Appendix D. Shared Memory Communications
must
be shared (or at
485