Veritas Storage Foundation™ 5.0.1 for Oracle RAC Installation, Configuration, and Administrator's Guide Extracts for the HP Serviceguard Storage Management Suite on HP-UX 11i v3
Preparing Hosts and Storage for Database FlashSnap
This section describes the following:
• “Setting Up Hosts” (page 53)
• “Creating a Snapshot Mirror of a Volume or Volume Set Used by the Database” (page 54)
• “Upgrading Existing Volumes to Use Veritas Volume Manager 5.0” (page 57)
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
Figure 5-1 shows the suggested arrangement for implementing Database FlashSnap solutions
on the primary host to avoid disk contention.
Figure 5-1 Example of a Database Flashsnap Solution on a Primary Host
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Two Host Configuration
Figure 5-2 illustrates an off-host Database FlashSnap solution. This figure shows a Database
FlashSnap configuration with two hosts that allows CPU-intensive 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.
For off-host processing applications, both the primary and secondary hosts need to share the
storage in which the snapshot database is created. Both the primary and secondary hosts must
be able to access the disks containing the snapshot volumes.
Preparing Hosts and Storage for Database FlashSnap 53