IBM Z9, Planning Manual

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Coupling facility LPs only support the following tasks typically available to the
hardware console operator:
v
Activate
v
Deactivate
v
Operating System Messages
Coupling Facility Control Code Commands
Coupling facility control code does provide a limited set of hardware operator
controls unique to the coupling facility LP. These controls are available from the
Operating System Messages panel. From this panel, you can enter the HELP
command to display coupling facility control code command syntax.
Coupling facility control code provides the following commands for use in the
coupling facility LP:
v
CONFIGURE (configure coupling facility channel paths online or offline)
v CP (configure a central processor online or offline)
v
DISPLAY (display coupling facility resource information)
v
DYNDISP (turn dynamic coupling facility dispatching on or off for a coupling
facility LP). See “Dynamic Coupling Facility Dispatching (DCFD)” on page 2-42.
v HELP (display coupling facility control code command syntax)
v
MODE (define coupling facility volatility mode)
v SHUTDOWN (shutdown coupling facility operation)
v
TIMEZONE (sets timezone offset from Greenwich Mean Time for a coupling
facility)
v TRACE (sets or modifies tracing options)
Notes:
1. Support for the CP and HELP coupling facility control code commands is
available on all System z9 models.
2. The settings established using DYNDISP, MODE and TIMEZONE commands
are recorded in the policy file for the coupling facility. As a result, all values are
persistent across resets, deactivations, and reactivations.
Coupling Facility Level (CFLEVEL) Considerations
To support migration from one coupling facility level to the next, you can run
different levels of the coupling facility concurrently as long as the coupling facility
LPs are running on different CPCs. CF LPs running on the same CPC share the
same coupling facility control code EC level.
When migrating CF levels, lock, list, and cache structure sizes might need to be
increased to support new function. The amount of space needed for the current
CFCC levels must be redetermined by visiting the CFSizer tool at
http://www-1.ibm.com/servers/eserver/zseries/cfsizer/.
CPC Support for Coupling Facility Code Levels
The following table summarizes CPC support for the different coupling facility code
levels.
2-50
PR/SM Planning Guide