Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

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
Figure 13-1 shows the suggested arrangement for implementing Database
FlashSnap solutions on the primary host to avoid disk contention.
Note: A single-host configuration does not apply to Veritas Storage Foundation
for Oracle RAC configurations because a RAC cluster contains multiple hosts.
Figure 13-1
Example of a Database FlashSnap solution on a primary host
Disks containing primary
volumes used to hold
production databases
Disks containing synchronized
full-sized instant snapshot
volumes
Primary Host
1 2
SCSI or Fibre Channel
Connectivity
Two-host or Oracle RAC configuration
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.
Because Veritas Storage Foundation for Oracle RAC uses multiple hosts, an Oracle
RAC configuration appears much like a two-host configuration, but without the
concepts of "off-host" processing or primary and secondary hosts.
Using Database FlashSnap for backup and off-host processing
Hosts and storage for Database FlashSnap
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