Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Building an HA Cluster Configuration
Setting up the Quorum Server
Chapter 5 151
Setting up the Quorum Server
The quorum server software, which has to be running during cluster
configuration, must be installed on a system other than the nodes on
which your cluster will be running.
• Ideally the Quorum Server and the cluster or clusters it serves
should communicate over a subnet that does not handle other traffic.
This helps to ensure that the Quorum Server is available when it is
needed.
If this is not practical, or if the communication must cover a long
distance (for example, if the Quorum Server is serving an Extended
Distance cluster) heavy network traffic or network delays could
cause Quorum Server timeouts. You can reduce the likelihood of
timeouts by increasing the Quorum Server timeout interval; use the
QS_TIMEOUT_EXTENSION parameter in the cluster configuration file.
See “Specifying a Quorum Server” on page 180.
• If a subnet that connects the Quorum Server to a cluster is also used
for the cluster heartbeat, configure the heartbeat on at least one
other network, so that both Quorum Server and heartbeat
communication are not likely to fail at the same time.