HP XP Cluster Extension Software Administrator Guide

NOTE: For the storage disks, you do not have to configure resources of type "Cluster Extension
XP for VM Management". You must configure only resources of type "Cluster Extension XP".
When configuring HP XP Cluster Extension resources, note the following:
• If the Failover Cluster Management GUI is used to configure an HP XP Cluster Extension
resource, configuring the resource using a user configuration file (UCF) is not required.
• If the resource is not configured to use the pair/resync monitor, HP XP Cluster Extension creates
a file called resource_name.online in the directory specified by the ApplicationDir
resource property.
If the resource is taken offline, this file will be removed, or the device/copy group associated
with the service or application will be removed from the pair/resync monitor list, if the
pair/resync monitor is configured for that resource. If the device/copy group is the last
monitored disk pair, and you take the resource offline, the pair/resync monitor will be stopped.
• Windows Server 2008 only: If an HP XP Cluster Extension resource is not configured, the
resource icon in the Failover Cluster Management GUI shows the message “not configured”
next to the resource status.
• The HP XP Cluster Extension resource must be the first resource for all disk resources in the
dependency list of a resource cluster group.
• If you have an application in a cluster that uses more than one physical disk from the same
device/copy group, configure a single HP XP Cluster Extension resource, and ensure that all
of the application disks depend on that resource. If the disks are split into different device/
copy groups, you must configure multiple HP XP Cluster Extension resources since an HP XP
Cluster Extension resource operates at the device-group level.
• The PendingTimeout value must be greater than the ResyncWaitTimeout value.
• The PendingTimeout must be greater than twice the wait time of all remote RAID Manager
instances multiplied by the number of remote systems. Otherwise, the HP XP Cluster Extension
resource will fail to go online if there is a complete remote data center failure.
t
online
> n
remote systems
x 2 x t
WT
where:
t
online
= resource online timeout
n
remote systems
= number of remote systems configured to run RAID Manager instances
t
WT
= wait time until remote error will be reported by local RAID Manager instance
If a post-executable is specified, the PendingTimeout must be greater than the number of remote
systems multiplied by three times t
WT
.
• When a copy group is used in the RAID Manager configuration file, the copy group name is
listed in the resource configuration tool XP device/copy group menu.
Setting Microsoft cluster-specific resource and service or application properties
Microsoft allows you to set specific failover parameter and threshold values for a service or
application, as well as for a resource. Some of these values must be changed for HP XP Cluster
Extension to enable manual recovery actions in case of a disaster.
To set Microsoft cluster-specific resource properties:
• For Windows Server 2008/2008 R2/2012/2012 R2, use the Failover Cluster Management
GUI, or cluster commands in the CLI, or use PowerShell Cmdlets.
• For Server Core or Hyper-V Server, use cluster commands in the CLI, or use PowerShell Cmdlets.
22 Configuring HP XP Cluster Extension