nodetool describecluster

Returns the name, snitch, partitioner, and schema version of a cluster.

Typically used to validate the schema after upgrading. If a schema disagreement occurs, see Handling schema disagreements and "Schema version mismatch detected" on node restart in the DataStax Support Knowledge Base.

Synopsis

nodetool [<connection_options>] describecluster
datacenter_name

Definition

The short- and long-form options are comma-separated.

Connection options

-h, --host hostname: The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.
-p, --port jmx_port: The JMX port number.
-pw, --password jmxpassword: The JMX password for authenticating with secure JMX. If a password is not provided, you are prompted to enter one.
-pwf, --password-file jmx_password_filepath: The filepath to the file that stores JMX authentication credentials.
-u, --username jmx_username: The username for authenticating with secure JMX.

Command arguments

datacenter_name: The datacenter name.

Examples

Get cluster name, snitch, partitioner, and schema version

nodetool describecluster dc1
Results without schema disagreement:
Cluster Information:
                Name: Test Cluster
                Snitch: com.datastax.bdp.snitch.DseDelegateSnitch
	         DynamicEndPointSnitch: enabled
                Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
                Schema versions:
                    d4f18346-f81f-3786-aed4-40e03558b299: [127.0.0.1]

Results when schema disagreement occurs:

Cluster Information:
                Name: Production Cluster
                Snitch: org.apache.cassandra.locator.DynamicEndpointSnitch
                Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
                Schema versions:
                UNREACHABLE: 1176b7ac-8993-395d-85fd-41b89ef49fbb: [10.202.205.203]

If schema disagreement occurs, the last line of the output includes information about unreachable nodes.