Pathway/XM System Management Manual

Configuring the Pathway/XM Environment

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

4-19

Configuring Object Attributes for Future Migration

In the future, you might need to migrate your Pathway/XM environment to a different

set of NonStop

Himalaya systems (physical nodes), either because of a system

failure or as part of a planned migration (for example, in a configuration that includes

Nomadic Disk technology). To best prepare your configuration for such future

migrations, it is recommended that you specify the physical node and the default

volume and subvolume in the SYSTEM and DEFAULT attributes of the NODE object

configuration and omit system, volume, and subvolume names from the attributes of

other objects.

Even when you omit the system, volume, and subvolume names from your object

attributes, however, some migration considerations arise. Using the NODE object

defaults can provide a smooth migration for process names. However, you might have

to change some disk-volume names and device names manually even if the system

portion of the name is not specified. 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 physical node.

Other attributes need careful review as well—for example, user ID specifications.

Table 4-1

lists object attributes that you might need to change when moving your

application to a different set of physical nodes.

Table 4-1. Migration Considerations: Object Attribute Values (page 1 of 2)

Object or Process Attribute Considerations/ Recommendations

NODE object CPUS Ensure that the CPU numbers are

valid for the physical node specified

in the SYSTEM attribute.

DEFAULT Ensure that the specified volume and

subvolume names are valid for the

physical node specified in the

SYSTEM attribute.

SYSTEM Specify the desired physical node

name for the processes governed by

this NODE object.

PATHWAY object OWNER owner-id Ensure that user ID is known to new

system or change manually.

SERVER class DEFINE define-spec Could include system name stored as

buffer; check and change manually if

required.

HOMETERM termname Ensure that a terminal with same

name exists on new system or change

manually.

OWNER owner-id Ensure that user ID is known to new

system or change manually.