Managing Serviceguard Fifteenth Edition, reprinted May 2008

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4158
QS_ADDR An alternate fully-qualified hostname or IP address for
the quorum server. This parameter is used only if you
use a quorum server and want to specify an address on
an alternate subnet by which it can be reached. For
more information, see “Using a Quorum Server” on
page 146 and “Specifying a Quorum Server” on
page 232.
This parameter cannot be changed while the cluster is
running; see the QS_HOST discussion above for details.
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
The volume group containing the physical disk volume
on which a cluster lock is written. This parameter is
used only when you employ a lock disk for tie-breaking
services in the cluster. If you are creating two cluster
locks, enter the volume group name or names for both
locks.
Use FIRST_CLUSTER_LOCK_VG for the first lock volume
group. If there is a second lock volume group, specify
the SECOND_CLUSTER_LOCK_VG on a separate line in the
configuration file.