HP 3PAR Cluster Extension Software Administrator Guide (5697-2047, June 2012)

failover packages
The failover package is the most common type of package. It runs on one node at a time. If a
failure occurs, it can switch to another node listed in its configuration file. If switching is enabled
for several nodes, the package manager will use the failover policy to determine where to start
the package.
HP 3PAR Cluster Extension supports only failover packages.
failover policy
It specifies how Serviceguard decides where to start the package, or restart it if it fails. It can be
set to configured_node or min_package_node. The default is configured_node.
• configured_node means that Serviceguard will attempt to start the package on the first
available node in the list you provide under node_name.
• min_package_node means that Serviceguard will start the package on whichever node in
the node_name list that has the fewest packages running at the time.
This parameter can be set for failover packages only.
failback policy
It specifies whether or not Serviceguard will automatically move a package that is not running on
its primary node (the first node on its node_name list) when the primary node is once again
available. It can be set to automatic or manual. The default is manual.
• manual means that the package will continue to run on the current node.
• min_package_node means that Serviceguard will move the package to the primary node
as soon as that node becomes available, unless doing so would also force a package with a
higher priority to move.
For more information on HP Serviceguard for Linux cluster setup considerations, see the latest
edition of Managing HP Serviceguard for Linux document.
Configuration tool (clx3parconfig.exe) for Windows
HP 3PAR Cluster Extension for Windows uses the configuration tool (clx3parconfig.exe) to
store configuration and access information for each configured management server. This tool stores
information in the clx3parcfg file. However, because the clx3parcfg file cannot be edited
with a standard text editor, management server entries can only be added, modified, and deleted
using the configuration tool that is included with the standard installation of HP 3PAR Cluster
Extension.
HP 3PAR InForm Management Console or HP 3PAR InForm CLI
HP 3PAR InForm Management Console or HP 3PAR InForm CLI is used to create virtual volumes
and configure the HP 3PAR storage system.
IP network considerations
HP 3PAR CLI is essential to Cluster extension which communicates with the HP 3PAR storage system
over the IP network. HP recommends that you provide reliable network connections for cluster node
to HP 3PAR storage system communications.
SAN fabric considerations
Ensure that cluster nodes in the zoning configuration recognize their respective (local) HP 3PAR
storage system, but not the remote HP 3PAR storage system.
20 HP 3PAR Cluster Extension features