Warning

SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.

delete-node

Description

Completely removes a node and its data from the cluster.

Note that this action is only reversible by deploying a new leaf in the same location, attaching it, and rebalancing partitions.

This command removes the specified node from the cluster and deletes its data. If the node is a leaf node, this command will also rebalance the leaf node’s partitions into the remaining cluster.

A node must be stopped before it can be deleted. Use the stop-node command to perform this action.

If --memsql-id, or --memsql-cnf, or --all is not specified, memsqlctl will prompt the user to select a node from a table.

If --memsql-cnf is specified, memsqlctl will attempt to first delete the specifieddirectories in the config (datadir, plancachedir, tracelogsdir, etc.). Finally, memsqlctl will delete the memsql.cnf file itself and its record in the node metadata file, nodes.hcl.

To remove a leaf node from the cluster without deleting its data, and with the ability to add it back to the cluster, refer to the memsqlctl remove-leaf command.

Usage

Usage:
  memsqlctl delete-node [flags]

Flags:
  -a, --all                 Delete all nodes on the host
  -h, --help                Help for delete-node
      --memsql-id strings   the node ID of the node to delete
      --stop                Stop each node before deletion

Global Flags:
  -c, --config FILE_PATH                     Path to the memsqctl config file
      --default-install-dir DIRECTORY_PATH   Path to the default install directory
      --insecure-ssl                         Fall back to insecure SSL connections to local nodes if memsqlctl is unable to otherwise establish a connection (ADVANCED)
  -j, --json                                 Print output in JSON format
      --node-metadata-file FILE_PATH         Path to the node metadata file
      --parallelism POSITIVE_INTEGER         Maximum amount of operations to be run in parallel
      --ssl-ca FILE_PATH                     The path to the CA certificate file (in PEM format) to authenticate the database certificate
      --timeout duration                     Maximum time for operation to complete (e.g., 30s, 10m, 1.5h)
      --verbose-json                         Print output in JSON format, include some warnings and user messages
  -v, --verbosity count                      Increase logging verbosity
  -y, --yes                                  Enable non-interactive mode and assume the user would like to move forward with the proposed actions by default

Remarks

This command is interactive unless you use either --yes or --json flag to override interactive behavior.
The memsqlctl delete-node command is equivalent to the sdb-admin delete-node command.

Output

The following is the standard output for the delete-node command.

Shell

sudo memsqlctl delete-node

memsqlctl will perform the following actions:
  · Delete SingleStore node
    - Base directory and contents: /var/lib/memsql/61cbf018-4256-4c43-82a7-530220e5817b

Would you like to continue? [y/N]: y
✓ Deleted node defined by MemSQL config file /var/lib/memsql/61cbf018-4256-4c43-82a7-530220e5817b/memsql.cnf