TS/MP System Management Manual (H06.05+, J06.03+)

Maintaining a PATHMON Environment
HP NonStop TS/MP System Management Manual—541819-007
5-34
Migrating Your Environment to a Different System
Associative Servers as Subtype 30 Processes
An associative server can be a subtype 30 process, which simulates a terminal or
communication device. When an associative server is a subtype 30 process, the
PATHMON process determines the server’s device type; you do not have to designate
the device type with the TYPE option of the RUN PROGRAM command. This
configuration is typical when a server process acts as a front end process (fep) for a
terminal. High-level language support (HLS) is often configured this way.
Migrating Your Environment to a Different
System
Careful preparation is required to switch your PATHMON environment to a different
system, either in the event of failure or as part of a planned migration.
The best preparation for any such move is to anticipate it when you first configure your
PATHMON environment. When you set global attributes using the SET PATHWAY
command, set the NODEINDEPENDENT attribute to ON to make unspecified node
names for processes and devices default to the node where the PATHMON process is
running after cool start. By configuring your application for node independence and
then leaving the node unspecified in any name you configure, you can avoid much of
the work involved in renaming objects and processes configured with hard-coded node
names. For more information on configuring your system for node-independence, see
Specifying Node Independence and SET PATHWAY Command. The SET PATHWAY
syntax description includes a list of objects and attributes that are node-independent
when the NODEINDEPENDENT attribute is set to ON.
Even with a node-independent PATHMON environment, a number of migration
considerations arise. The node-independent designation can provide a smooth
migration for disk files and process names. However, you may have to change parts of
device names manually even if the node portion of the name is independent. For
example, if you are migrating terminals or printers, you will either need to manually
change the device names or ensure that terminal and printer devices with the same
names are attached to the new node. Other attributes need careful review as well—for
example, processor and user ID specifications. This table lists object attributes that
may need to be changed with the ALTER command when migrating your application.
The table includes objects supported by the NonStop TS/MP product and, as noted,
the Pathway/iTS product.