HP StorageWorks XP Cluster Extension Software Administrator Guide (T1656-96035, April 2010)

2 Configuring XP Cluster Extension for AIX
XP Cluster Extension is integrated with the HACMP cluster software using HACMP customization
functions. Cluster administrators configure disk array failover as a pre-event of the standard HACMP
event get_disk_vg_fs.
For information about how to install XP Cluster Extension in an IBM HACMP environment, see the HP
StorageWorks XP Cluster Extension Software installation guide.
For supported operating system versions, see the HP SPOCK website: http://www.hp.com/storage/
spock.
Configuring resources
The XP Cluster Extension resource gathers all necessary information about the disk arrays and
configured device groups whenever a resource group is brought online.
If configured, a pair/resync monitor is started to monitor the XP Cluster Extension resource. To use
this monitor, set the standard HACMP event release_vg_fs to call a pre-event.
Call the XP Cluster Extension binary clxhacmp as a pre-event of the standard HACMP event
get_disk_vg_fs to check the status of the XP RAID Manager device group and, if necessary, to
allow access to the device group before HACMP tries to access the disks of the resource group.
Configure XP Cluster Extension parameters with the user configuration file: /etc/opt/hpclx/conf/
UCF.cfg. See Chapter 8 on page 123 for more information about the user configuration file.
Configuring the pair/resync monitor
The pair/resync monitor is a service that verifies that disks are in the pair state, and resyncs them
when necessary. The pair/resync monitor determines whether the requesting server is allowed access
to the pair/resync monitor. To access the pair/resync monitor, you must update the remote access
hosts file and configure the pair/resync monitor port.
Updating the remote access hosts file
Enter the names of the remote systems in a remote access hosts file.
1. Open the /etc/opt/hpclx/conf/clxhosts file.
2. Enter each host name on a separate line.
You can leave blank lines, but do not enter comments. For example:
# cat /etc/opt/hpclx/conf/clxhosts
dcBserver
dcAserver
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