Administrator's Guide

N-to-1 and 1-to-N configurations
NOTE: The restrictions outlined in “1-to-1 configuration” (page 9) also apply to N-to-1
configurations.
When setting up an N-to-1 or 1-to-N configuration (see Figure 3 (page 10)), consider the following:
• HP 3PAR Cluster Extension uses the unit of Remote Copy volume groups as the failover unit.
This means all virtual volumes or members of a Remote Copy volume group will be failed over
if the cluster software moves disk access from one cluster node to another.
• A given HP 3PAR Cluster Extension resource can manage only one Remote Copy group.
Figure 3 N-to-1 and 1-to-N configuration
Processes and components
For Windows Clustering (MSFC), HP 3PAR Cluster Extension is shipped as a resource DLL. The
installation of HP 3PAR Cluster Extension also includes a CLI for custom HP 3PAR Remote Copy
integration. Customized solutions for failover application services must implement HP 3PAR Cluster
Extension through the CLX CLI (clx3PARrun.exe) prior to the disk activation procedure on the
server.
The installation of HP 3PAR Cluster Extension also includes a CLI for custom HP 3PAR Remote Copy
integration. Customized solutions for failover application services must implement HP 3PAR Cluster
Extension through the CLX CLI (clx3PARrun.exe) prior to the disk activation procedure on the
server.
HP 3PAR Remote Copy
HP 3PAR Remote Copy is a product that allows you to copy virtual volumes from one HP 3PAR
storage system to another. The copy can be used for disaster recovery, backup, or data migration.
NOTE: HP 3PAR Remote Copy requires 3PAR Remote Copy licenses for all storage servers
participating in a Remote Copy replication. See the 3PAR InForm OS Concepts Guide for additional
information on licensing and features.
10 HP 3PAR Cluster Extension features