Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4102
QS_POLLING_INTERVAL
The time (in microseconds) between attempts to
contact the quorum server to make sure it is running.
Default is 300,000,000 microseconds (5 minutes).This
parameter is not used if CLUSTER_LOCK_LUN is used.
QS_TIMEOUT_EXTENSION
The quorum server timeout is the time during which
the quorum server is not communicating with the
cluster. After this time, the cluster will mark the
quorum server DOWN. This time is calculated based on
Serviceguard parameters, but you can increase it by
adding an additional number of microseconds as an
extension.
The QS_TIMEOUT_EXTENSION is an optional parameter.
A value higher than NODE_TIMEOUT will increase the
failover time. This parameter is not used if
CLUSTER_LOCK_LUN is used.
NODE_NAME The hostname of each system that will be a node in the
cluster. A cluster may contain up to 16 nodes. The node
name can contain up to 31 bytes.
CLUSTER_LOCK_LUN
The pathname of the device file to be used for the lock
LUN on the previously specified node. This parameter
is not used if QS_HOST is used. The pathname can
contain up to 255 characters.
NETWORK_INTERFACE
The name of each LAN that will be used for heartbeats
or for user data. An example is ‘eth0’.
HEARTBEAT_IP
IP notation indicating the subnet that will carry the
cluster heartbeat. Note that heartbeat IP addresses
must be on the same subnet on each node.