Managing Serviceguard 12th Edition, March 2006

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4156
Cluster Configuration Parameters
For the operation of the cluster manager, you need to define a set of
cluster parameters. These are stored in the binary cluster configuration
file, which is located on all nodes in the cluster. These parameters can be
entered by editing the cluster configuration template file created by
issuing the cmquerycl command, as described in the chapter “Building
an HA Cluster Configuration.” The parameter names given below are the
names that appear in the cluster ASCII configuration file.
The following parameters must be identified:
CLUSTER_NAME
The name of the cluster as it will appear in the output
of cmviewcl and other commands, and as it appears in
the cluster configuration file.
The cluster name must not contain any of the following
characters: space, slash (/), backslash (\), and asterisk
(*). All other characters are legal. The cluster name can
contain up to 39 characters.
QS_HOST The name or IP address of a host system outside the
current cluster that is providing quorum server
functionality. This parameter is only used when you
employ a quorum server for tie-breaking services in the
cluster.
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).
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.
FIRST_CLUSTER_LOCK_VG, SECOND_CLUSTER_LOCK_VG