Coupling Facility Resource Management (Cfrm) Policy Considerations; Coupling Facility Channels - IBM Z9 Planning Manual

Coupling Facility Resource Management (CFRM) Policy Considerations

Coupling Facility Channels

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2-54
PR/SM Planning Guide
CPC Support: See Table 2-8 on page 2-51 for a listing of the CPCs that support a
level 8 coupling facility.
Software Corequisites: For a list of the software levels that exploit the new
function and levels that can coexist with CFLEVEL=8, see the "Summary of
CFLEVEL Functions" section of the z/OS MVS Setting Up a Sysplex document.
To define how to manage z/OS images and coupling facilities in the sysplex, you
must specify hardware configuration information in the coupling facility resource
management (CFRM) policy as follows:
v Coupling facility node descriptor information
You must identify each coupling facility in the sysplex and the processor complex
on which it is running. To do so, you must specify the following information in the
CFRM policy:
CFRM Parameter
PLANT
SEQUENCE
SIDE
TYPE
MFG
CPCID
This information is available on the CPC Details panel. You can access the CPC
Details panel by opening the CPC object that is running the coupling facility LP.
v LP information for the coupling facility
For a coupling facility residing on a System z9 model, the partition ID specified
on the activation profile for the CF image on the support element or hardware
master console must match the number specified in the PARTITION keyword of
the CF statement in the policy information defined in the CFRM policy. IBM
recommends that the LP names for the CF LPs in IOCP input files match the
names used in the NAME keyword in the CF statement in the CFRM policy.
You can find the LP names in either the IOCP or HCD reports.
Coupling facility channels are System z9 channels that use either fiber optic cables
(CFP channel paths) or the channel subsystem's self-timed interface (STI) cables
(CBP channel paths), an InfiniBand host channel adapter (HCA) (CIB channel
paths), or internal memory bus (ICP channel paths) to provide the connectivity for
data sharing between a coupling facility and the central processor complexes
(CPCs) or logical partitions (LPs) directly attached to it.
The class of CHPIDs, known as peer mode channels, provide both sender and
receiver capability on the same link. Peer mode links come in three varieties:
Internal Coupling Channels (TYPE=ICP), Integrated Cluster Bus Channels
(TYPE=CBP), InfiniBand (TYPE=CIB), and HiPerLinks (TYPE=CFP). Each ICP,
CBP, and CFP channel can be configured as an unshared dedicated channel path
to a single coupling facility and at the same time, as a shared channel path among
several z/OS images and one coupling facility image.
Description
Plant of manufacture
Machine sequence number
Machine side
Machine type
Manufacturer
CPC identifier