Managing Serviceguard 14th Edition, June 2007

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5236
To display the failover times of disks, use the cmquerycl command,
specifying all the nodes in the cluster. The output of the command lists
the disks connected to each node together with the re-formation time
associated with each.
Do not include the node’s entire domain name; for example, specify
ftsys9, not ftsys9.cup.hp.com:
cmquerycl -v -n ftsys9 -n ftsys10
cmquerycl will not print out the re-formation time for a volume group
that currently belongs to a cluster. If you want cmquerycl to print the
re-formation time for a volume group, run vgchange -c n <vg name> to
clear the cluster ID from the volume group. After you are done, do not
forget to run vgchange -c y vgname to re-write the cluster ID back to
the volume group; for example:
vgchange -c y /dev/vglock
NOTE You should not configure a second lock volume group or physical volume
unless your configuration specifically requires it. See the discussion
“Dual Cluster Lock” in the section “Cluster Lock” in Chapter 3.
If your configuration requires you to configure a second cluster lock,
enter the following parameters in the cluster configuration file:
SECOND_CLUSTER_LOCK_VG /dev/volume-group
SECOND_CLUSTER_LOCK_PV /dev/dsk/block-special-file
where the /dev/volume-group is the name of the second volume group
and block-special-file is the physical volume name of a lock disk in
the chosen volume group. These lines should be added for each node; for
example:
SECOND_CLUSTER_LOCK_VG /dev/vglock
SECOND_CLUSTER_LOCK_PV /dev/dsk/c4t0d0
or (using agile addressing; see “About Device File Names (Device Special
Files)” on page 111):
SECOND_CLUSTER_LOCK_VG /dev/vglock
SECOND_CLUSTER_LOCK_PV /dev/disk/disk100
See also “Choosing Cluster Lock Disks” on page 213.