Veritas Storage Foundation for Oracle 5.0 Graphical User Interface Guide, HP-UX 11i v3, First Edition, May 2008

See “Database FlashSnap in the GUI”
on page 73.
For off-host processing or backup, you can
use the Database FlashSnap feature to create
a volume snapshot for the database.
Database FlashSnap lets you capture an
online image of an actively changing
database at a given instant, known as a
snapshot. You can perform backups and
off-host processing tasks on snapshots while
providing continuous availability of your
critical data.
About setting up a disk group
Before creating file systems for a database, set up a disk group for each database.
A disk group lets you group disks, volumes, file systems, and files that are relevant
to a single database into a logical collection for easy administration. Because you
can move a disk group and its components as a unit from one machine to another,
you can move an entire database when all the configuration objects of the database
are in one disk group. This capability is useful in a failover situation.
Disk group configuration guidelines
Follow these guidelines when setting up disk groups:
■ Only disks that are online and do not already belong to a disk group can be
used to create a new disk group.
■ Create one disk group for each database.
■ The disk group name must be unique. Name each disk group using the Oracle
database instance name specified by the environment variable $ORACLE_SID
and a dg suffix. The dg suffix helps identify the object as a disk group. Also,
each disk name must be unique within the disk group.
■ Never create database files using file systems or volumes that are not in the
same disk group.
In earlier releases of Veritas Volume Manager, a system installed with VxVM was
configured with a default disk group, rootdg, that had to contain at least one disk.
VxVM can now function without any disk group having been configured. Only
when the first disk is placed under VxVM control must a disk group be configured.
Note: Most VxVM commands require superuser or equivalent privileges.
41Managing your database
About setting up a disk group