TS/MP 2.5 System Management Manual

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 requestor 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 ACS subsystem 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 ACS subsystem 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.
SET SERVER Command and TMF 327