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Chapter 9Adding a Node to a ClusterFor a description of the options for adding a diskless node or dataless node to a cluster, see the following sections: Deciding How to Add a Node to a ClusterBefore adding a node to a cluster, ask the following questions:
To use the CMM API to add or remove a node from a cluster, see the cmm_config_reload(3CMM) man page. Determining Whether a Cluster Has Predefined NodesTo determine whether a cluster has predefined nodes, perform the following procedure.
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# nhcmmstat -c all |
This command returns information about the nodes that are up and running in the cluster, but does not return information about nodes that are physically present but down.
Determine how many nodes are defined in the cluster configuration.
Look at the cluster_nodes_table file.
The /etc/opt/SUNWcgha/cluster_nodes_table file contains a line for each node in the cluster definition. Count the number of nodes configured in this file.
If there is an /export/root directory on the master node, examine its contents.
There is one /diskless-node-name directory for each diskless node in the cluster.
Count the number of nodes physically present in the cluster.
Use the output of the nhcmmstat command and your knowledge of any nodes that are physically present but down. If a cluster has predefined nodes that are not diskless nodes, they are dataless nodes.
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