nodetool drain

Drains the node.

Synopsis

nodetool <options> drain

Table 1. Options
Short	Long	Description
`-h`	`--host`	Hostname or IP address
`-p`	`--port`	Port number
`-pwf`	`--password-file`	Password file path
`-pw`	`--password`	Password
`-u`	`--username`	User name
`--`	Separates an option from an argument that could be mistaken for a option.

Description

Flushes all memtables from the node to SSTables on disk. Cassandra stops listening for connections from the client and other nodes. You need to restart Cassandra after running nodetool drain. You typically use this command before upgrading a node to a new version of Cassandra. To simply flush memtables to disk, use nodetool flush.