Managing Serviceguard Fifteenth Edition, reprinted May 2008

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4164
For information about changing the configuration
online, see “Changing the Cluster Networking
Configuration while the Cluster Is Running” on
page 367.
CLUSTER_LOCK_LUN
The path on this node for the LUN used for the cluster
lock. Used only if a lock LUN is used for tie-breaking
services.
Enter the path as it appears on each node in the cluster
(the same physical device may have a different name
on each node). The path must identify a block device.
You cannot create a dual cluster-lock configuration
using LUNs.
See “Setting Up a Lock LUN” on page 211 and
“Specifying a Lock LUN” on page 231 for more
information.
FIRST_CLUSTER_LOCK_PV, SECOND_CLUSTER_LOCK_PV
The name of the physical volume within the Lock
Volume Group that will have the cluster lock written
on it. Used on only if a lock disk is used for tie-breaking
services. This parameter is FIRST_CLUSTER_LOCK_PV
for the first physical lock volume and
SECOND_CLUSTER_LOCK_PV for the second physical lock
volume. If there is a second physical lock volume, the
parameter SECOND_CLUSTER_LOCK_PV is included in
the file on a separate line. These parameters are only
used when you employ a lock disk for tie-breaking
services in the cluster.
Enter the physical volume name as it appears on each
node in the cluster (the same physical volume may
have a different name on each node). If you are creating
two cluster locks, enter the physical volume names for
both locks. The physical volume group identifier can
contain up to 39 characters (bytes).
For information about changing the configuration
while the cluster is running, see “Updating the Cluster
Lock Disk Configuration Online” on page 361.