Managing Serviceguard 14th Edition, June 2007

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4 161
The amount of time a node waits before it stops trying
to join a cluster during automatic cluster startup. In
the cluster configuration file, this parameter is
AUTO_START_TIMEOUT. All nodes wait this amount of
time for other nodes to begin startup before the cluster
completes the operation. The time should be selected
based on the slowest boot time in the cluster. Enter a
value equal to the boot time of the slowest booting node
minus the boot time of the fastest booting node plus
600 seconds (ten minutes).
Default is 600,000,000 microseconds.
Can be changed while the cluster is running.
NETWORK_POLLING_INTERVAL
The frequency at which the networks configured for
Serviceguard are checked. In the cluster configuration
file, this parameter is NETWORK_POLLING_INTERVAL.
Default is 2,000,000 microseconds in the configuration
file (2 seconds). Thus every 2 seconds, the network
manager polls each network interface to make sure it
can still send and receive information. Using the
default is highly recommended. Changing this value
can affect how quickly a network failure is detected.
The minimum value is 1,000,000 (1 second). The
maximum value recommended is 15 seconds, and the
maximum value supported is 30 seconds.
Can be changed while the cluster is running.
MAX_CONFIGURED_PACKAGES
This parameter sets the maximum number of packages
that can be configured in the cluster.
The minimum value is 0, and the maximum value is
150. The default value for Serviceguard is 150, and you
can change it without halting the cluster.
VOLUME_GROUP
The name of an LVM volume group whose disks are
attached to at least two nodes in the cluster. Such disks
are considered cluster-aware. The volume group
name can have up to 39 characters (bytes).