Veritas FlashSnap Point-In-Time Copy Solutions 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

18 Point-in-time copy solutions

Implementing off-host point-in-time copy solutions

Alternatively, the OHP node could be a separate system that has a network

connection to the cluster, but which is not a cluster node and is not connected to

the cluster’s private network. This arrangement is illustrated in Figure 1-6.

Figure 1-6 Example implementation of an off-host point-in-time copy solution

using a separate OHP host

Note: For off-host processing, the example scenarios in this document assume

that a separate OHP host is dedicated to the backup or decision support role. For

clusters, it may be simpler, and more efficient, to configure an OHP host that is

not a member of the cluster.

Figure 1-7 illustrates the steps that are needed to set up the processing solution

on the primary host. Disk Group Split/Join is used to split off snapshot volumes

into a separate disk group that is imported on the OHP host.

Note: As the snapshot volumes are to be moved into another disk group and then

imported on another host, their contents must first be synchronized with the

parent volumes. On reimporting the snapshot volumes, refreshing their

contents from the original volume is speeded by using FastResync.

Network

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

Cluster