Veritas Storage Foundation 5.0 for Oracle RAC Configuration Guide Extracts for HP Serviceguard Storage Management Suite, Second Edition, May 2008

Using FlashSnap for Backup and Recovery
Backing Up the Database from Snapshot Volumes (dbed_vmclonedb)
Chapter 5
103
Backing Up the Database from Snapshot Volumes
(dbed_vmclonedb)
Snapshots are most commonly used as a source for backing up a database. The
advantage of using snapshot volumes is that the backup will not contest the I/O
bandwidth of the physical devices. Making the snapshot volumes available on a
secondary host will eliminate the extra loads put on processors and I/O adapters by the
backup process on the primary host.
A clone database can also serve as a valid backup of the primary database. You can back
up the primary database to tape using snapshot volumes.
Figure 5-5 shows a typical configuration when snapshot volumes are located on the
primary host.
Figure 5-5 Example System Configuration for Database Backup on the Primary
Host
Figure 5-6 shows a typical configuration when snapshot volumes are used on a
secondary host.
Snapsh ot volumes are
creat ed on t hese disks
Database volumes are
cr ea ted o n t hese disks
P
r
i
mary
h
os
t
f
or
d
a
t
a
b
ase
Controllers
c1 c2 c3 c4
Back up to disk, t ape or
other media by primary
host
Disk
Arrays
Local di sks