C OLSNODES Command Reference

This appendix describes the syntax and command options for the olsnodes command.

Note:

Starting with Oracle Grid Infrastructure 23ai, Domain Services Clusters (DSC), which is part of the Oracle Cluster Domain architecture, are desupported.

Oracle Cluster Domains consist of a Domain Services Cluster (DSC) and Member Clusters. Member Clusters were deprecated in Oracle Grid Infrastructure 19c. The DSC continues to be available to provide services to production clusters. However, with most of those services no longer requiring the DSC for hosting, installation of DSCs are desupported in Oracle Database 23ai. Oracle recommends that you use any cluster or system of your choice for services previously hosted on the DSC, if applicable. Oracle will continue to support the DSC for hosting shared services, until each service can be used on alternative systems.

Using OLSNODES

This section contains topics which relate to using the OLSNODES command.

Overview

The olsnodes command provides the list of nodes and other information for all nodes participating in the cluster.

You can use this command to check that your cluster is operational, and all nodes are registered as members of the cluster. This command also provides a method for obtaining the node numbers.

Operational Notes

This command is used by the Configuration Verification Utility (CLUVFY) to obtain a list of node names when the -allnodes option is used.

This command utility is located in the $ORA_CRS_HOME/bin directory. You can only use this command if the CRS daemon is started.

Privileges and Security

You can run this command as either the root user, the user who installed Oracle Clusterware, or the user who installed Oracle Database.

Summary of the OLSNODES Command

The olsnodes command does not use keywords, but accepts one or more options.

Syntax

olsnodes [[-n] [-s] [-t] [node_name | -l [-p]] | [-c]] [-a] [-g] [-v]

If you issue the olsnodes command without any command parameters, the command returns a listing of the nodes in the cluster:

[root@node1]# olsnodes
node1
node2
node3
node4

Table C-1 OLSNODES Command Options

Options	Description
-n	Lists all nodes participating in the cluster and includes the assigned node numbers.
-s	Displays the status of the node: active or inactive.
-t	Displays node type: pinned or unpinned.
node_name	Displays information for a particular node.
-l [-p]	Lists the local node and includes the private interconnect for the local node. The -p option is only valid when you specify along with the -l option.
-c	Displays the name of the cluster.
-a	Displays only active nodes in the cluster with no duplicates.
-g	Logs cluster verification information with more details.
-v	Logs cluster verification information in verbose mode. Use in debug mode and only at the direction of My Oracle Support.

Examples

Example 1: List all nodes currently in the cluster

To list the nodes that are currently members of the cluster, use the command:

[root@node1]# olsnodes
node1
node2
node3
node4

Example 2: List the node names and node numbers for cluster members

To list the node name and the node number for each node in the cluster, use the command:

[root@node1]# olsnodes -n
node1    1
node2    2
node3    3
node4    4