Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4 107
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.
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 not used if
CLUSTER_LOCK_LUN is used. The QS_HOST name can
contain up to 39 bytes.
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.