OSI/TS Configuration and Management Manual

NonStop Kernel File-System Interface
OSI/TS Configuration and Management Manual—424831-001
7-2
Setting and Modifying Subdevice Values
TSP processes are started either by an operator, from the command interpreter, or
by an application, using a file-system call. Use the following implicit RUN
command to start TSP from the TACL command interpreter:
TSPOBJ / run-option-list / [ backup-cpu ]
See Section 3, Configuring the OSI/TS Subsystem
for further details on starting the
TSP process and configuring the OSI/TS subsystem.
All TSP processes are run named; the ?RUNNAMED directive is set in the
TSPOBJ file. This means that your application can communicate with any TSP
process regardless of the process PIN (process identification number).
Setting and Modifying Subdevice Values
Several attributes must be specified when a subdevice is added. Some of these
attributes characterize the transport connection during the data-transfer phase: for
example, the protocol class or the size of the transmit window. Still other
attributes specify values that OSI/TS uses during error recovery, such as the
amount of time to continue trying to establish a subnetwork connection after a
failure.
You can use SCF to alter and display the permanently configured attributes of a
subdevice. After your application opens the subdevice, it can call the
SETPARAM and SETMODE procedures to dynamically change some subdevice
attribute values as seen by that application only. The values assigned using
SETPARAM and SETMODE remain in effect until your application closes the
device the configured values take effect again the next time the subdevice is
opened. To obtain the values set dynamically by your application, call
SETPARAM or SETMODE.
Table 7-1
lists OSI/TS subdevice (SU) parameters and shows how they can be
set and changed. If values are not configured for the SU parameters, the values
are taken from the SERVICE parameters (the default). Table 7-2 lists OSI/TS
SERVICE parameters (alphabetized by SCF attribute name) and shows how they
can be set and changed. Note that the table gives only keywords and function
numbers, not complete syntax. For detailed syntax of the SCF attributes, refer
to the OSI/TS SCF Reference Manual. For more information on the SETPARAM
and SETMODE functions, see Setting and Retrieving Subdevice Parameters
later in
this section.
To reduce the number of I/O processes required to establish a connection, we
recommend you configure the attribute values using SCF rather than
SETPARAM.
Note. SCF displays give the permanently configured values, and do not reflect any
changes made by SETPARAM or SETMODE calls in your application program.