Managing Serviceguard Fifteenth Edition, reprinted May 2008

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4156
Heartbeat Subnet and Re-formation Time
The speed of cluster re-formation is partially dependent on the type of
heartbeat network that is used. If two or more heartbeat subnets are
used, the one with the fastest failover time is used.
NOTE For heartbeat requirements, see the discussion of the HEARTBEAT_IP
parameter later in this chapter.
Cluster Configuration Parameters
You need to define a set of cluster parameters. These are stored in the
binary cluster configuration file, which is distributed to each node in the
cluster. You configure these parameters by editing the cluster
configuration template file created by means of the cmquerycl
command, as described under “Configuring the Cluster” on page 228.
The following parameters must be configured:
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
(*).
NOTE In addition, the following characters must not be used
in the cluster name if you are using the Quorum
Server: at-sign (@), equal-sign (=), or-sign (|), semicolon
(;).
These characters are deprecated, meaning that you
should not use them, even if you are not using the
Quorum Server, because they will be illegal in a future
Serviceguard release.