OSI/FTAM Configuration and Management Manual

Managing the FTAM Configuration
OSI/FTAM Configuration and Management Manual—421944-001
4-18
Controlling Object States
Controlling Object States
Another important tool for managing your installation is the ability to control object
states. You can use SCF commands to control the states of subdevices and processes in
an FTAM configuration.
Aborting Subdevices
The SCF command ABORT causes a subdevice to change from the STARTED state to
being nonexistent—that is, it discards the subdevice. Certain actions require that
subdevices associated with a process first be discarded. Note the following examples:
•
Suspending a process using the SCF SUSPEND command
•
Stopping a process using the SCF STOP command
Before you can perform either of these actions—suspending or stopping—on a process,
all subdevices associated with the process must be discarded; that is, no subdevices can
exist for that process.
You use the ABORT SU command to abort a subdevice. An example of an ABORT SU
command is:
ABORT SU $FTI1.#Z000002
The ABORT command stops a subdevice abruptly, despite the fact that the subdevice is
in use. (Any subdevice that exists, even a responder subdevice that is waiting for an
association, is considered to be in use.) When you issue the ABORT SU command, the
communication links that the subdevice provides between the process and the OSI/AS
subsystem are terminated. A responder subdevice is then discarded immediately; an
initiator subdevice will be discarded later, when the application discards the associated
CEPI.
Before issuing the ABORT command to a subdevice, first use the NAMES SU command
to determine the names of all subdevices associated with the process. Recall that FTAM
responder processes automatically regenerate a subdevice when a subdevice is aborted
(discarded). To ensure that a responder process has no subdevices associated with it,
change the ALLOWSU attribute for the PROCESS object to OFF before aborting the
subdevice; this stops the automatic regeneration of subdevices. For more information on
the ALLOWSU attribute and using the SCF ALTER command to change this attribute,
see Using Tandem FTAM Configuration Attributes
on page 3-27 and Changing Process
Configurations on page 3-58.
The STOP command cannot be issued to an FTAM subdevice, since any subdevice that
exists is in use. If you wish to stop a subdevice in an orderly fashion, you must stop the
entities that are using the subdevice rather than the subdevice itself. For example, if you
want to stop a subdevice being used by a particular application, stop the application. The
process using the subdevice will discard it, and you can proceed with your tasks.