Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004
Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5222
NOTE You should not configure a second lock volume group or physical volume
unless your configuration specifically requires it. See the discussion
“Dual Cluster Lock” in the section “Cluster Lock” in Chapter 3.
If your configuration requires you to configure a second cluster lock,
enter the following parameters in the cluster configuration file:
SECOND_CLUSTER_LOCK_VG /dev/volume-group
SECOND_CLUSTER_LOCK_PV /dev/dsk/block-special-file
where the /dev/volume-group is the name of the second volume group
and block-special-file is the physical volume name of a lock disk in the
chosen volume group. These lines should be added for each node.
Specifying a Quorum Server
To specify a quorum server instead of a lock disk, use the -q option of the
cmquerycl command, specifying a Quorum Server host server. Example:
# cmquerycl -n ftsys9 -n ftsys10 -q qshost
The cluster ASCII file that is generated in this case contains parameters
for defining the quorum server. This portion of the file is shown below:
# Quorum Server Parameters. Use the QS_HOST,
QS_POLLING_INTERVAL,
# and QS_TIMEOUT_EXTENSION parameters to define a quorum
server.
# The QS_HOST is the host name or IP address of the system
# that is running the quorum server process. The
# QS_POLLING_INTERVAL (microseconds) is the interval at which
# The optional QS_TIMEOUT_EXTENSION (microseconds) is used to
increase
# the time interval after which the quorum server is marked
DOWN.
#
# The default quorum server interval is calculated from the
# Serviceguard cluster parameters, including NODE_TIMEOUT and
# HEARTBEAT_INTERVAL. If you are experiencing quorum server
# timeouts, you can adjust these parameters, or you can include
# the QS_TIMEOUT_EXTENSION parameter.
#
# For example, to configure a quorum server running on node
# "qshost" with 120 seconds for the QS_POLLING_INTERVAL and to
# add 2 seconds to the system assigned value for the quorum