This section explains the topologies used for single-node cluster operation:
It is an operation mode in which a cluster system consists of one node.
Advantages
This operation mode enables monitoring and control jobs on the node in a single node configuration.
If an error occurs in the resource to which the AUTORECOVER attribute is set, the availability can be improved by automatically restarting the system for restoration.
You can also use this mode as a development environment for creating and testing cluster applications.
Notes
Jobs will be suspended in the case of a hardware failure because a single-node cluster has no hardware to switch to. Build a cluster with multiple nodes if you need to switch hardware when a hardware failure occurs.
If multiple cluster systems exist in an environment in which the virtual machine function is used, build a single-node cluster on the highest priority node as the figure shown below.
Figure 2.11 Example: Single-node cluster configuration
In an environment in which the virtual machine environment is used, a guest OS on the single-node cluster is shut down under the following conditions (see the figure below):
Multiple cluster systems exist;
Priority is low for the node that includes the single-node cluster; and
The node is forcibly shutdown (due to an inter-node communication failure or other causes).
Figure 2.12 Example: Configuration for cluster interconnect failure
No failover occurs in the single-node cluster operation.
Note
You need at least one network interface card for cluster interconnect that is used in PRIMECLUSTER also in the single-node cluster operation.
