Linking Service Groups (Online/Offline Dependencies)
You can link service groups from the command line or from the Java and Web consoles. This section describes the hagrp -link command.
Note that a configuration may require that a certain service group be running before another service group can be brought online. For example, a group containing resources of a database service must be running before the database application is brought online.
To link service groups:
# hagrp -link parent_group child_group gd_category
gd_location gd_type
The variable parent_group is the name of a service group.
The variable child_group is the name of a service group.
The variable gd_category is the category of group dependency (online/offline).
The variable gd_location is the boundary of parent_group-child_group link (local/global/remote).
The optional variable gd_type is the type of group dependency (soft/firm/hard).
Note
While configuring group dependencies, if dependency type (soft/firm/hard) is omitted, the group dependency defaults to firm.
Configuring Service Group Dependencies
To configure a service group dependency, place the requires clause in the service group declaration within the VCS configuration file, before the resource dependency specifications, and after the resource declarations. For example:
- To configure groupx and groupy as an online local firm dependency:
group groupx (...group definition...)...resource declarations...
requires group groupy online local firm...resource dependencies...
- To configure groupx and groupy as an online global soft dependency:
group groupx (...group definition...)...resource declarations...
requires group groupy online global soft...resource dependencies...
|
