SNAX/XF and SNAX/APN Configuration and Management Manual

Introduction to SCF for SNAX/XF and SNAX/APN
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
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DSM and SCF Commands
DSM and SCF Commands
SCF is a DSM tool in the operations environment. It is a unified command interface
that simplifies the tasks of configuring, controlling, and collecting information about
NonStop subsystems.
Several SCF commands are available for displaying and changing SCF session
parameters. For example, the OUT command controls the files used for display output.
The ASSUME command sets the default object type and object name. The HELP
command can be used in several different ways; in its basic form, it displays a list of
the available SCF commands. You can also request additional specific information,
such as command syntax, for each command. Commands such as OUT, ASSUME,
and HELP are not subsystem-specific and are described in the SCF Reference Manual
for G-series RVUs.
Many SCF commands operate on the objects belonging to a subsystem. For example,
you can use the INFO command to display the current attribute values for a SNAX/XF
or SNAX/APN physical unit (PU), and you can use the ALTER command to change
those attribute values. Commands that operate on SNAX/XF and SNAX/APN
subsystem objects are described in Section 13, SCF Commands for SNAX/XF and
SNAX/APN.
Sensitive and Nonsensitive Commands
Some SCF commands cause changes in the operation of the subsystem to which they
are sent; for example, they change the state or configuration of objects, start or stop
tracing, or reset the values of statistics counters. Commands on which SCP performs
security checking and screening are called sensitive commands.
Because such commands can have detrimental effects if improperly used, special
qualification is required to use them. To protect the integrity of the subsystem, the SCP
process allows only certain users to perform such commands. A sensitive command
can be issued only by a user with super-group access, by the owner of the subsystem,
or by a member of the group of the owner of the subsystem. The owner of a subsystem
is the user who started that subsystem (or any user whose application ID is the same
as the server ID—the result of a PROGID option that requires super-group access).
For SNAX/XF and SNAX/APN commands, that means the members of the user group
that owns the service-manager process.
Commands that request information or status but do not affect operation are called
“nonsensitive commands.” SCP does not perform any security checking on these
commands, but allows any user to perform them.
The description for each command in Section 13, SCF Commands for SNAX/XF and
SNAX/APN states whether the command is a sensitive command.
General SCF Command Format
An SCF command always begins with a keyword that identifies it (such as ADD,
START, or STATS).