Installation guide
Lab el Specifies the quorum disk label created by the
mkqdisk
utility. If this field
contains an entry, the label overrides the Device field. If this field is used,
the quorum daemon reads
/proc/partitions
and checks for qdisk
signatures on every block device found, comparing the label against the
specified label. This is useful in configurations where the quorum device
name differs among nodes.
Q u o ru m Disk
Heu rist ics
Pro g ram — The program used to determine if this heuristic is alive. This
can be anything that can be executed by
/bin/sh -c
. A return value of
0 indicates success; anything else indicates failure. This field is required.
Sco re — The weight of this heuristic. Be careful when determining scores
for heuristics. The default score for each heuristic is 1.
In t erval — The frequency (in seconds) at which the heuristic is polled.
The default interval for every heuristic is 2 seconds.
Paramet er Descrip t io n
5.3. Configuring Clust er Propert ies
In addition to configuring cluster parameters in the preceding section (Section 5.2, “ Starting the
Clu st er Co n f ig u rat io n T o o l” ), you can configure the following cluster properties: Clu st er Alias
(optional), a C o n f ig Versio n (optional), and Fen ce D aemo n Pro p ert ies. To configure cluster
properties, follow these steps:
1. At the left frame, click Clu st er.
2. At the bottom of the right frame (labeled Pro p ert ies), click the Edit Cluster Properties
button. Clicking that button causes a Cluster Properties dialog box to be displayed.
The Cluster Properties dialog box presents text boxes for Clu st er Alias, Co n f ig
Versio n , and two Fen ce Daemon Pro p ert ies parameters: Po st - Jo in Delay and Po st -
Fail Delay.
3. (Optional) At the Clu st er Alias text box, specify a cluster alias for the cluster. The default
cluster alias is set to the true cluster name provided when the cluster is set up (refer to
Section 5.2, “ Starting the Clu st er Co n f ig u rat io n T o o l” ). The cluster alias should be
descriptive enough to distinguish it from other clusters and systems on your network (for
example, nfs_cluster or httpd_cluster). The cluster alias cannot exceed 15 characters.
4. (Optional) The Co n f ig Versio n value is set to 1 by default and is automatically incremented
each time you save your cluster configuration. However, if you need to set it to another value,
you can specify it at the Co n f ig Versio n text box.
5. Specify the Fen ce D aemo n Pro p ert ies parameters: Po st - Jo in Delay and Po st - Fail
Delay.
a. The Po st - Jo in D elay parameter is the number of seconds the fence daemon
(fenced) waits before fencing a node after the node joins the fence domain. The
Po st - Jo in Delay default value is 3. A typical setting for Po st - Jo in Delay is
between 20 and 30 seconds, but can vary according to cluster and network
performance.
b. The Po st - Fail D elay parameter is the number of seconds the fence daemon
(fenced) waits before fencing a node (a member of the fence domain) after the node
has failed.The Po st - Fail Delay default value is 0. Its value may be varied to suit
cluster and network performance.
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