Pathway/XM System Management Manual

Configuring Servers

Compaq NonStop™ Pathway/XM System Management Manual—426761-001

6-9

Setting the TMF Parameter

The SET SERVER statement includes a TMF parameter with an ON or OFF option:

•

TMF ON: The TCP allows a SCREEN COBOL SEND operation, or the

LINKMON process allows a Pathsend server-class send operation, to members of

this server class whether or not the SCREEN COBOL or Pathsend requester

program is in transaction mode.

•

TMF OFF: The TCP allows a SCREEN COBOL SEND operation, or the

LINKMON process allows a Pathsend server-class send operation, to members of

this server class only if the SCREEN COBOL or Pathsend requester program is not

in transaction mode. OFF is the default setting.

By setting this parameter, therefore, you control the types of operations your servers can

perform.

Similarly, the SET TERM and SET PROGRAM statements include a TMF parameter

with an ON or OFF option. The effects of these parameters on the operation of your

SCREEN COBOL requesters and TCPs, as well as their interaction with the TMF

parameter in the SET SERVER statement, are described in Section 3.

Careful use of the TMF parameters for SERVER, TERM, and PROGRAM objects in

your Pathway/XM configuration helps to ensure the consistency of the database and to

improve the reliability and performance of your applications.

If a TMF error occurs and makes normal operations impossible, do not attempt to

continue normal operations by setting the TMF parameter options to OFF. An

application that needs TMF to provide database consistency is at risk when TMF is not

enabled. Instead, refer to the operations and recovery manual for your version of

NonStop™ TM/MP to determine how to recover from the TMF error.

Setting Guardian Startup Attributes

Several SERVER attributes affect the startup message that the Guardian operating

system sends to new server processes when they are created.

DEFINE

DEFINE assigns a DEFINE definition as part of a server-class definition. You can use

DEFINEs to specify the default volume and subvolume and to specify files used by the

server.

ASSIGN

ASSIGN assigns a logical file name to a physical file used by your server program and

specifies the attributes of that file.

You can include multiple ASSIGN specifications for a server class to cover as many

files as necessary. The ASSIGN specification sets up a correspondence between the

name used for a file by your server program and the name by which the TACL

command recognizes this file. If your server program is written in COBOL85, you use

this attribute to override a program file assignment made in the SELECT clause.