VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Chapter 10, Using Database FlashSnap for Backup and Off-Host Processing
Prerelease 8 September 2005, 8:55am Preparing Hosts and Storage for Database FlashSnap
203
Preparing Hosts and Storage for Database FlashSnap
Setting Up Hosts
Database FlashSnap requires sufficient VERITAS Volume Manager disk space, and can be used on
the same host that the database resides on (the primary host) or on a secondary host. Setting up a
storage configuration for Database FlashSnap operations is a system administrator’s responsibility
and requires superuser (root) privileges. Database FlashSnap utilities do not address setting up an
appropriate storage configuration.
Single-Host Configuration
The following figure, “Example of a Database FlashSnap Solution on a Primary Host” on
page 204shows the suggested arrangement for implementing Database FlashSnap solutions on the
primary host to avoid disk contention.
Example of a Database FlashSnap Solution on a Primary Host
Two-Host Configuration
As shown in the figure below, “Example of an Off-Host Database FlashSnap Solution” on
page 205,a Database FlashSnap configuration with two hosts allows CPU- and I/O-intensive
operations to be performed for online backup and decision support without degrading the
performance of the primary host running the production database. A two-host configuration also
allows the snapshot database to avoid contending for I/O resources on the primary host.
Disks containing primary
volumes used to hold
production databases
Disks containing
synchronized full-sized
instant snapshot volumes
Primary Host
12
SCSI or Fibre
Channel Connectivity