Novell OPEN ENTERPRISE SERVER 2 SP 2 - CLUSTER SERVICES 1.8.7 FOR LINUX, Руководство пользователя

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168 OES 2 SP2: Novell Cluster Services 1.8.7 for Linux Administration Guide
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With the resource Failover mode set to AUTO, the resource automatically starts on the next server
in the Assigned Nodes list in the event of a hardware or software failure. If the resource Failover
mode is set to MANUAL, you can intervene after a failure occurs and before the resource is moved
to another node.
With the resource Failback mode set to DISABLE, the resource does not fail back to its most
preferred node when the most preferred node rejoins the cluster. If the resource Failback mode is set
to AUTO, the resource automatically fails back to its most preferred node when the most preferred
node rejoins the cluster. Set the resource
Failback mode to MANUAL to prevent the resource from
moving back to its preferred node when that node is brought back online, until you are ready to
allow it to happen.
The preferred node is the first server in the Assigned Nodes list for the resource.
IMPORTANT: Resources only fail back to the first node in their Assigned Nodes list. So if a
resource has failed over to three servers since it originally ran on its preferred node, and the second
server the resource was running on comes back up, the resource will not failback to that second
server.
Resources do not automatically move from node to node just because a node higher in the Assigned
Nodes list rejoins the cluster, unless the Failback mode is set to AUTO and the first node in the
Assigned Nodes list rejoins the cluster.
To continue configuring a new cluster resource:
1 (Conditional) Select the Resource Follows Master check box if you want to ensure that the
resource runs only on the master node in the cluster.
If the master node in the cluster fails, the resource fails over to whichever node becomes the
master.
2 (Conditional) Select the Ignore Quorum check box if you don't want the cluster-wide timeout
period and node number limit enforced.
The quorum default values were set when you installed Novell Cluster Services. You can
change the quorum default values by accessing the properties page for the Cluster object.
Selecting this box ensures that the resource is launched immediately on any server in the
Assigned Nodes list as soon as any server in the list is brought online.
3 Specify the Start , Failover , and Failback modes for this resource.
The default for both Start and Failover modes is AUTO, and the default for Failback mode is
DISABLE.
4 Click Next .
5 Assign nodes to the resource as described in Section 9.8, “Assigning Nodes to a Resource,” on
page 127 .
6
Configure resource priorities for load order as described in Section 9.9, “Configuring Resource
Priorities for Load Order,” on page 127 .
7 (Optional) Continue with Section 11.4, “Creating a Virtual Server Name for the Cluster
Resource,” on page 169 .