READ ME before using the Veritas Storage Foundation™ 5.1 SP1 for Oracle RAC Administrator's Guide (April 2011)

4 Using Storage Checkpoints and Storage Rollback
This chapter provides information on using Veritas Storage Checkpoints and Veritas Storage
Rollback when they are included in Serviceguard Cluster File System for RAC Bundles (SG SMS
Version A.04.00 bundles T2777EB, T8687EB, and T8697EB)
Storage Checkpoints and Storage Rollback in SGeRAC
Veritas Storage Checkpoints enable efficient backup and recovery of Oracle databases. The Veritas
Storage Checkpoint feature is available with SGeRAC as part of the Veritas File System package
and is used for the efficient backup and recovery of Oracle databases. Storage Checkpoints can
also be mounted, allowing regular file system operations to be performed or secondary databases
to be started. Review the information on Storage Checkpoints and Storage Rollback and how to
use these technologies through HP Serviceguard for Oracle RAC.
Using Storage Checkpoints and Storage Rollback for Backup and Restore
SGeRAC provides a Storage Checkpoint facility that is similar to the snapshot file system mechanism;
however, a Storage Checkpoint persists after a system reboot. A Storage Checkpoint creates an
exact image of a database instantly and provides a consistent image of the database from the
point in time the Storage Checkpoint was created. The Storage Checkpoint image is managed
and available through the HP Storage Management suite command line interface (CLI).
A direct application of the Storage Checkpoint facility is Storage Rollback. Because each Storage
Checkpoint is a consistent, point-in-time image of a file system, Storage Rollback is the restore
facility for these on-disk backups. Storage Rollback rolls back changed blocks contained in a
Storage Checkpoint into the primary file system for restoring the database faster.
For more information on Storage Checkpoints and Storage Rollback, see the Veritas File System
Administrator’s Guide.
Using the Storage Checkpoint Command Line Interface (CLI)
Veritas Storage Foundation for Oracle RAC provides a command line interface to many key
operations. The command line interface lets you incorporate command operations into scripts and
other administrative processes.
NOTE: The SGeRAC command line interface depends on certain tablespace and container
information that is collected and stored in a repository. Some CLI commands update the repository
by default. It is also important to regularly ensure the repository is up-to-date by using the
dbed_update command.
NOTE: For SGeRAC database, when you issue the commands, replace $ORACLE_SID with
$ORACLE_SID=instance_name and provide the instance name on which the instance is running.
Overview of Commands
SGeRAC commands supported in the command line interface are located in the /opt/VRTS/bin
directory. Online manual pages for these commands are located in the /opt/VRTS/man directory.
Table 3 summarizes the commands available to you from the command line.
Table 3 Veritas Storage Foundation for Oracle RAC Commands
DescriptionCommand
Creates or updates the repository in Veritas Storage Foundation for Oracle RACdbed_update
Creates a Storage Checkpoint for an Oracle databasedbed_ckptcreate
20 Using Storage Checkpoints and Storage Rollback