Command Reference Guide

Appendix BConfiguration Files
AppendixB Configuration Files
This appendix describes:
• Initial definition of SNAplus2 node and domain resources
• Format of configuration files
• Changes made to the node and domain resources by the Motif program
• File input to the
snapadmin
program
B.1 Initial Configuration Files
Configuration records for a node’s resources are included in the node configuration file. When you start the
SNAplus2 software, the configuration file
/etc/opt/sna/sna_node.cfg is used as the initial definition of
the node’s configuration. SNAplus2 uses the information in this file to define the resources available when the node
is started and to start any resources that you have specified as being initially active.
Configuration records for domain resources are included in the domain configuration file, instead of in individual
node configuration files. For information about the distinction between domain resources and node resources, refer
to the
HP-UX SNAplus2 Administration Guide.
When you start the SNAplus2 software on the master server, the domain configuration file /etc/opt/sna/
sna_domn.cfg is used as the initial definition of SNAplus2 domain resources.
If a file cannot be opened or if it contains information that is not valid, the SNAplus2 node will not start. For more
information about starting SNAplus2, refer to HP-UX SNAplus2 Administration Guide.
B.2 Configuration File Format
A SNAplus2 configuration file is an ASCII text file with information stored in readable text format. You can set
up or check your configuration using a standard ASCII text editor.
Although you can modify configuration files using a text editor, you can do this only when the SNAplus2 software is
not running. You are not recommended to modify the files in this way except when setting up the initial configuration
(before starting the SNAplus2 software). To modify the configuration while the SNAplus2 software is running, use
the command-line administration program or the Motif administration program. If you need to modify a node’s
configuration file using a text editor, the SNAplus2 software must not be running on the node or on the server for
that node.If you need to modify the domain configuration file using a text editor, you must first stop the SNAplus2
software on all servers, modify the file on the master server, and then restart the SNAplus2 software on the master
server before restarting it on any other servers.
Note
Both SNAplus2 configuration files are regenerated by the owning server when a configu-
ration command is issued or when configuration is changed using the Motif interface. If
you have changed the file using a text editor while the SNAplus2 software is running, these
conditions will overwrite your changes to the file, and the sequence of fields in the file may
be changed.
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