Veritas Storage Foundation 5.1 SP1: Storage and Availability Management for Oracle (5900-1504, April 2011)

Veritas NetBackup, while not a shipped component of Veritas Storage Foundation
Enterprise products, can be purchased separately.
How block-level incremental backup works
Block-Level Incremental (BLI) Backup extends the capabilities of NetBackup to
back up only changed data blocks of Oracle database files. BLI Backup accomplishes
this backup methodology using the Storage Checkpoint facility in the Veritas File
System (VxFS) available through Storage Foundation for Databases tools. BLI
Backup reduces both the time required to complete a database backup and the
amount of data transferred during backups. It also allows more frequent backups,
resulting in more up-to-date backup images. When restoring from backups, the
restore time is increased only by the extra time needed for NetBackup to apply
the incremental backups after a full restore completes. However, frequent
incremental backups can speed up the database recovery by reducing the number
of redo logs to apply.
BLI Backup is particularly useful in a database environment where a database can
be hundreds of gigabytes or terabytes. Using traditional backup methods for an
offline database backup, any change in the database file—no matter how
small—requires backing up the entire database file. Using BLI Backup, only
modified data blocks need to be backed up.
Note: To allow BLI Backups, the database must be on VxFS file systems using the
Version 4, 5, 6, or 7 layout, and you must have a valid Veritas Storage Foundation
Enterprise license. Use the command to determine the layout version of your file
system. See the (1M) manual page for more information.
For information on how to install, configure, and use Veritas NetBackup for Oracle
Advanced BLI Agent to perform Oracle database backups, see the Veritas NetBackup
for Oracle Advanced BLI Agent System Administrator's Guide.
About using Veritas NetBackup for backup and restore
for Oracle
Veritas NetBackup provides for high performance, online (hot) backups of
databases that must be available on a 24x7 basis, as well as offline (cold) database
backups. Veritas NetBackup lets you back up and restore database files and
directories. You can set up schedules for automatic, unattended, online, and offline
database backup, as well as full or incremental backup. These backups are managed
entirely by the NetBackup server. You can also manually back up database files
Backing up and restoring with Netbackup in an SFHA environment
About using Veritas NetBackup for backup and restore for Oracle
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