IBM Z9, Руководство по планированию

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For more information on using HCD with Multiple Image Facility, see
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z/OS Hardware Configuration Definition: User’s Guide , SC33-7988
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z/OS Hardware Configuration Definition Planning , GA22-7525
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z/VM I/O Configuration , SC24-6100.
z/VM Dynamic I/O Configuration Support
z/VM Support for the Coupling Facility: z/VM allows you to define configurations
that use the coupling facility. However, z/VM does not support the coupling facility
itself. Instead, z/VM’s dynamic I/O configuration capability allows you to define
resources that can be used by a z/OS system in another LP. For a summary of
z/VM’s support of dynamic I/O configuration, see Table 2-2.
z/VM Support for the Multiple Image Facility (MIF): You can use z/VM to define
shared channel paths. For a summary of z/VM support of dynamic I/O configuration,
see Table 2-2.
Table 2-2. z/VM Dynamic I/O Support for MIF and the Coupling Facility
z/VM Function
Release
5.3, 5.2, 5.1
Define shared channel paths? Yes
Define coupling facility channel paths?
Yes
(Note)
Write IOCDSs remotely? No
Access I/O devices on shared channel paths? Yes
Use software-only dynamic I/O? Yes
Use hardware and software dynamic I/O? Yes
Use shared ESCON CTCs? Yes
Note: z/VM can define coupling facility channel paths for a z/OS LP but does not support
real coupling facility channel paths for use by z/VM or guest operating systems.
Input/Output Configuration Program (IOCP) Support
You can create up to four IOCDSs. ICP IOCP is the required supported version.
You can define as many as 60 LPs. For more information on ICP IOCP, see
Input/Output Configuration Program User’s Guide , SB10-7037.
Characteristics of an IOCDS
The definitions for channel paths, control units, and I/O devices are processed by
the IOCP and stored in an IOCDS. During initialization of the CPC, the definitions of
a selected IOCDS are transferred to the hardware system area (HSA). The IOCDS
is used to define the I/O configuration data required by the CPC to control I/O
requests.
Channel paths in an IOCDS are assigned to one or more LPs. The characteristics
of an IOCDS are:
v
Using the IOCP RESOURCE statement, you define logical channel subsystems
(CSSs) and the logical partitions that have access to the channel paths in a CSS.
v Using the IOCP RESOURCE statement, you can name logical partitions and
assign MIF image ID numbers to them. MIF image ID numbers are necessary for
ESCON CTC and FICON CTC definitions. You can also reserve unnamed logical
partitions associated with specific MIF image ID numbers that can later be
dynamically named.
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PR/SM Planning Guide
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