VERITAS Volume Manager 4.1 Administrator's Guide

Configuring Off-Host Processing
Implementing Off-Host Processing Solutions
Chapter 11386
that are attached to different host controllers than the disks in the
primary volumes, it is possible to avoid contending with the primary host
for I/O resources.
Figure 11-1 Example Implementation of Off-Host Processing
The following sections describe how you can apply off-host processing to
implement regular online backup of a volume in a private disk group,
and to set up a replica of a production database for decision support. Two
applications are outlined in the following sections:
• “Implementing Online Backup” on page 386
• “Implementing Decision Support” on page 390
These applications use the Persistent FastResync and disk group move,
split and join features of VxVM in conjunction with volume snapshots.
Implementing Online Backup
This section describes a procedure for implementing off-host online
backup for a volume in a private disk group. The intention is to present
an outline of how to set up a regular backup cycle by combining the
Disks containing primary
volumes used to hold
production databases or
file systems
Disks containing snapshot
volumes used to
implement off-host
processing solutions
SCSI or Fibre
Channel
Connectivity
OHP Host
Primary Host