SCF Reference Manual for G-Series RVUs (G06.27+)

Using SCF to Configure and Manage NonStop
S-Series Servers
SCF Reference Manual for G-Series RVUs—520413-005
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Subsystem Managers
Subsystem Managers
Each subsystem manager has the following functions:
•
Creates I/O processes and other manager processes within the subsystem.
•
Configures subsystem objects such as adapter hardware and the ServerNet
addressable controllers (SACs) that those adapters support.
•
Identifies the names of processes that must be reserved at system load.
•
Monitors its processes to immediately re-create any process that has terminated (if
it was configured to be persistent).
The principal subsystems used for G-series system configuration are listed in
Table 1-1. The manuals for each of these subsystems are given on page xii. These
subsystems are generic processes that are started and maintained by the $ZPM
persistence manager, whereas the older subsystems are started by the operator,
usually in the form of separate RUN commands in a TACL command file.
Generic Processes
A key component of G-series configuration architecture is generic processes that can
be created by the operating system or a user. Examples of generic processes created
by the operating system are the subsystem managers listed in Table 1-1. Examples of
generic processes created by a user can be an HP program, a third-party program, or
a user-written program that you configure to be controlled by the operating system.
$ZPM starts and monitors all generic processes on systems running G-series. Refer to
the SCF Reference Manual for the Kernel Subsystem for more information about
generic processes.
Table 1-1. Principal Subsystems for G-Series System Configuration
Subsystem Manager Responsibility
Kernel $ZZKRN All generic processes (including $ZZLAN, $ZZSTO, and
$ZZWAN), system attributes, and ServerNet X and Y fabrics
that can be configured by SCF
SLSA $ZZLAN All ServerNet local area network (LAN) systems access
connections and facilities
Storage $ZZSTO All storage devices, such as disk and tape drives
WAN $ZZWAN All wide area network (WAN) connections, including products
that connect over Ethernet