TS/MP System Management Manual (G06.24+, H06.03+)

NonStop TS/MP System Management Manual—541819-001
E-1
E Setting TMF Parameters
When you are configuring and controlling a PATHMON application that uses the
Transaction Management Facility (TMF) subsystem of the TMF, consider these basic
questions:
•
How do the settings you specify for the TMF parameter of the SET SERVER
command affect Pathsend procedure calls and SCREEN COBOL SEND
statements?
•
What problems are caused by using the TMF OFF option of the SET TERM or SET
PROGRAM commands as a switch to turn TMF off for a requester that is
communicating with servers running under the TMF software?
Addressing these questions helps ensure the consistency of the database and helps
you to improve the reliability and performance of the applications that use the
database.
SET SERVER Command and TMF
The SET SERVER command contains a TMF parameter with an ON or OFF option.
By setting this parameter to one of these, you control the types of operations a server
class can perform:
•
TMF ON--The LINKMON process or TCP allows a Pathsend server-class send
operation or SCREEN COBOL SEND to members of this server class whether or
not the Pathsend or SCREEN COBOL program is in transaction mode.
•
TMF OFF—The LINKMON process or TCP allows a Pathsend server-class send
operation or SCREEN COBOL SEND to the members of this server class only if
the Pathsend or SCREEN COBOL program is not in transaction mode. OFF is the
default setting.
Precautions for Using TMF Parameters
If a TMF error occurs and makes normal operations impossible, setting the TMF
parameter options to OFF is not the solution for continuing normal operations. An
application that needs TMF to provide database consistency is at risk when TMF is not
running.
To determine how to address the TMF error, see the HP NonStop TMF Operations and
Recovery Guide .