Introduction to NonStop Operations Management

Operations Management Tools
Introduction to NonStop Operations Management–125507
14-6
Distributed Name Service (DNS)
You can specify any one of a number of reports as the output of the DSAP utility. Each
report analyzes the disk in a different way, for example:
•
The Subvol Summary report analyzes the space usage for each subvolume on a disk.
•
The User Summary report analyzes the space usage for each user who owns files on
the disk.
•
The User Detail report lists the file name and space usage for each file on the disk.
•
The Summary of Space report provides a high-level summary of how space is used
on the disk.
Distributed Name Service (DNS)
DNS is a subsystem that manages a distributed database of names. DNS provides an
automated method of keeping track of the names and interrelationships of network
components (such as systems, devices, and applications). It allows the configuration
management staff to store in a database the names (and aliases) of system and network
objects, facts about their relationships, and instructions for replicating name definitions
on remote nodes. The staff updates the database as needed to reflect configuration
changes. The database is online and can be accessed by operators and other applications.
DNS allows you to:
•
Assign one or more names (or aliases) to a component. If two operators know a
terminal by two different names, you can assign both names to the terminal so that
each operator can easily access the information.
•
Write management applications that access the DNS database.
•
Control a database centrally or locally. You can distribute all or parts of the DNS
database to any node in a network while maintaining centralized control of its
contents. When you update the database centrally, the updates are distributed to the
remote databases automatically.
If you want to control DNS databases locally, you can give each node control of its
own names and have each node forward its name definitions to a central control
system.