Distributed Name Service (DNS) Management Operations Manual

How to Define DNS Names
Building and Modifying the DNS Database
31258 Tandem Computers Incorporated 4–9
Specifying Aliases in
SSOBJECT and
SSMANAGER Definitions
Using DNSCOM, you can specify aliases when defining an SSOBJECT or
SSMANAGER name. As a convenience of DNSCOM, it performs an ADD ALIAS
command for each alias in the specified alias list within each SSOBJECT or
SSMANAGER definition you build. This automatic adding of aliases is done when
DNS processes the ADD SSOBJECT or ADD SSMANAGER command.
The alias list can also include, for each alias, an alias type (which overrides a
previously specified alias type name). The alias list can also include the DOMAIN of
each alias. See the individual syntax description for the ADD SSOBJECT, SET
SSOBJECT, ADD SSMANAGER, or SET SSMANAGER command in Section 7 for
adding an alias list in these name definitions.
How to Define DNS
Names
These subsections include information about each DNS name, including its
relationship and dependencies on other DNS names. The command descriptions in
Section 7 provide more details about defining DNS names, which include explanations
of the attributes used to define each DNS name.
Defining Subsystem Names A subsystem (SS) name identifies either a Tandem subsystem or a subsystem you
write. A subsystem name definition has two parts:
An owner name (such as TANDEM)
A subsystem number (such as 10)
These parts correspond to those of a Subsystem Programmatic Interface (SPI) ID,
which an application must specify to send a command to a subsystem or must test to
decode event messages from the subsystem.
The subsystem number must be unique among subsystems defined by the owner. It
must also correspond to the subsystem number in the programmatic interface, which
is described in the Distributed Systems Management (DSM) Programming Manual.
As stated earlier in this section in“Name Dependencies and Relationships,” the
subsystem name is a building block for defining subsystem-type names and subsystem
manager names.
Tandem subsystem names are defined to DNS during DNS initialization as described
in Section 3 under “Initializing and Starting DNS Configurations.” For most
environments, you do not need to define Tandem subsystem names yourself. If the
subsystem names required at your site were not created at DNS initialization, use the
ADD SS command to create the necessary subsystem names. Figure 4-3 displays the
names dependent on the existence of the SS definition.