nodetool netstats

Provides network information about the host.

Provides network information about the host.

Synopsis

nodetool <options> netstats -H
  • Options are:
    • ( -h | --host ) <host name> | <ip address>
    • ( -p | --port ) <port number>
    • ( -pw | --password ) <password >
    • ( -u | --username ) <user name>
    • ( -pwf <passwordFilePath | --password-file <passwordFilePath> )
  • H converts bytes to a human readable form: kilobytes (KB), megabytes (MB), gigabytes (GB), or terabytes (TB). (Cassandra 2.1.1)

Description

The default host is the connected host if the user does not include a host name or IP address in the command. The output includes the following information:
  • JVM settings
  • Mode

    The operational mode of the node: JOINING, LEAVING, NORMAL, DECOMMISSIONED, CLIENT

  • Read repair statistics
  • Attempted

    The number of successfully completed read repair operations

  • Mismatch (blocking)

    The number of read repair operations since server restart that blocked a query.

  • Mismatch (background)

    The number of read repair operations since server restart performed in the background.

  • Pool name

    Information about client read and write requests by thread pool.

  • Active, pending, and completed number of commands and responses

Example

Get the network information for a node 10.171.147.128:

nodetool -h 10.171.147.128 netstats

The output is:

Mode: NORMAL
Not sending any streams.
Read Repair Statistics:
Attempted: 0
Mismatch (Blocking): 0
Mismatch (Background): 0
Pool Name                    Active   Pending      Completed
Commands                        n/a         0           1156
Responses                       n/a         0           2750