HP Integrity NonStop H-Series - Manual (Page 72)

DNS Groups
Object Specifications
3-8 098571 Tandem Computers Incorporated
Nesting Object
Specifications
You can force the same qualifiers to apply to every object specification in a comma-
delimited list. To do so, enclose the entire list of object specifications in parentheses
and place the qualifiers outside the parentheses.
Within the parentheses, qualifiers apply only to the object specifications of which they
are a part. Any qualifiers outside the parentheses apply to the entire list within the
parentheses.
Considerations when nesting object specifications include:
You can nest object specifications; that is, a list within parentheses can appear
inside another list. There is no practical limitation on nesting.
You cannot specify a node qualifier outside parentheses except as part of a
manager name.
Examples
For example, assume the groups BERLIN, LONDON, and PARIS all contain objects of
many different types from various subsystems. The following command starts SNAX
LUs in LONDON, SNAX PUs in BERLIN, and all SNAX objects in PARIS:
START SNAX (LU LONDON, PU BERLIN, PARIS) ONLY
In the command, LU applies to LONDON; PU applies to BERLIN; and ONLY applies
to all three groups.
You can override a qualifier outside the parentheses by specifying a qualifier of the
same type in an object specification within the parentheses. If you do so, the inside
qualifier applies only to its own object specification. For example, using the same
three groups as before, the following command starts the SNAX lines in LONDON
and PARIS, and the SNAX PUs in BERLIN.
START SNAX LINE (LONDON, PU BERLIN, PARIS) ONLY
In the command, ONLY applies to all three groups.
DNS Groups A DNS group is an arbitrary combination of subsystem objects, composites, or other
groups. All objects in the group must belong to subsystems that DSNM supports, and
must be types that are supported by DSNM.
Groups contain only subsystem object aliases, not their names. Because DSNM
resolves aliases to subsystem object names, the effect is as if the object were a direct
group member.
When you use a group name as the object of a command, the command applies to all
members of the group, unless you use qualifiers to restrict the command to selected
members.