Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual page 59

cluster service operation. To manage the cluster system further, choose the Cluster
Configuration tab.)
3. Clicking Create New Configuration causes the New Configuration dialog box to be displayed
Figure 5.2, "Creating A New
(refer to
a text box for a cluster name and group boxes for the following configuration options: Choose
Lock Method, Use Multicast (DLM clusters only), and Use a Quorum Disk (DLM clusters only).
In most circumstances you only need to configure a cluster name and a lock method. Distributed
Lock Manager (DLM) is the default lock method. To configure a GULM cluster, select Grand
Unified Lock Manager (GULM). (Selecting Grand Unified Lock Manager (GULM) disables Use
Multicast and Use a Quorum Disk, which are applicable only to DLM clusters). Use Multicast
specifies whether a multicast address is used for cluster management communication among
cluster nodes. Use Multicast is disabled (checkbox unchecked) by default. To use a multicast
address for cluster management communication among cluster nodes, click the Use Multicast
checkbox (enabled when checked). When Use Multicast is enabled, the Address text boxes are
enabled; enter the multicast address into the Address text boxes. To use a quorum disk, click
the Use a Quorum Disk checkbox and enter quorum disk parameters. The following quorum-
disk parameters are available in the dialog box if you enable Use a Quorum Disk: Interval, TKO,
Votes, Minimum Score, Device, Label, and Quorum Disk Heuristic.
Parameters"
describes the parameters.
Important
Quorum-disk parameters and heuristics depend on the site environment and special
requirements needed. To understand the use of quorum-disk parameters and
heuristics, refer to the qdisk(5) man page. If you require assistance understanding and
using quorum disk, contact an authorized Red Hat support representative.
Note
It is probable that configuring a quorum disk requires changing quorum-disk
parameters after the initial configuration. The Cluster Configuration Tool (system-
config-cluster) provides only the display of quorum-disk parameters after initial
configuration. If you need to configure quorum disk, consider using Conga instead;
Conga allows modification of quorum disk parameters.
Overall:
While system-config-cluster provides several convenient tools for configuring
and managing a Red Hat Cluster, the newer, more comprehensive tool, Conga,
provides more convenience and flexibility than system-config-cluster. You
may want to consider using Conga instead (refer to
Cluster With Conga
Configuration"). The New Configuration dialog box provides
Chapter 4, Managing Red Hat Cluster With
and
Starting the Cluster Configuration Tool
Table 5.1, "Quorum-Disk
Chapter 3, Configuring Red Hat
Conga).
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