Managing Serviceguard 12th Edition, March 2006

Planning and Documenting an HA Cluster
Cluster Configuration Planning
Chapter 4 159
Enter the physical volume name as it appears on both
nodes 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.
SERIAL_DEVICE_FILE
The name of the device file that corresponds to serial
(RS232) port that you have chosen on each node.
Specify this parameter when you are using RS232 as a
heartbeat line.
In the ASCII cluster configuration file, this parameter
is SERIAL_DEVICE_FILE. The device file name can
contain up to 39 characters.
HEARTBEAT_INTERVAL
The normal interval between the transmission of
heartbeat messages from one node to the other in the
cluster.
In the ASCII cluster configuration file, this parameter
is HEARTBEAT_INTERVAL, and its value is entered in
microseconds.
Default value is 1,000,000 microseconds; setting the
parameter to a value less than the default is not
recommended.
The default should be used where possible. The
maximum value recommended is 15 seconds, and the
maximum value supported is 30 seconds. This value
should be at least half the value of
Node Timeout
(below).
NODE_TIMEOUT
The time after which a node may decide that the other
node has become unavailable and initiate cluster
reformation. This parameter is entered in
microseconds.
Default value is 2,000,000 microseconds in the ASCII
file. Minimum is 2 * (Heartbeat Interval). The
maximum recommended value for this parameter is